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My '95 Caprice Classic STW, "Sally" - Page 6
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Thread: My '95 Caprice Classic STW, "Sally"

  1. #101
    Lost and driftin' Arquemann's Avatar
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    I actually managed to achieve desirable results!

    First time I tried modifying the MPH shift points. No effect on shifts. The seemingly insanely high shift points are actually correct. I initially though the 3rd gear went up to ~100mph, it's actually the second gear that goes so far...

    Second time I reverted the shift point changes and only changed the WOT shift RPM thresholds, from 5344RPM to 5000RPM. That had the result I was looking for, it no longer jerks on WOT shift and goes straight into second gear.
    The shifts are still insanely hard, but that has a different cause. And I'll hopefully fix it aswell, not necessarily with software though.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  2. #102
    GMN Regular DerekTheGreat's Avatar
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    How does TunerPro connect & interface with the stock PCM? Seems like once you figure that out, you can rewrite what's there? That's neat, as I know for my older TBI equipped stuff I need to burn new PROM chips every time I want to change something.
    1985 LTD Crown Victoria - SOLD
    1988 Town Car Signature - Current Party Barge

  3. #103
    Lost and driftin' Arquemann's Avatar
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    I used a program called flashhack to load the tune file from the PCM. Changes to the tune file are done in Tunerpro. Modified tune file is then overwritten to the PCM with flashhack. No chips required, even though those "tune chips" are/were available for the LT1s.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  4. #104
    Lost and driftin' Arquemann's Avatar
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    Apparently this thing has an actual performace tune on it, not just some trans meddling. VE tables, spark advance and retard tables, MAF calibration almost everything is fiddled with.
    Fuckin' shiet... It complicates things.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  5. #105
    Lost and driftin' Arquemann's Avatar
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    Well, I ended up flashing a stock '95 Caprice tune to the PCM. Found it online, happened to be with the correct 2.56 gear ratio, doesn't hurt to try.
    The shifts got a wee bit smoother, I'd say it requires more fiddling to call it good. I'm a bit cautious on this since those hard shift can cause traction loss, especially during the winter...

    Now, I'm not 100% sure, I need to do more testing, but it seems that the jerkiness is gone. During my test drive it did not jerk or did very little during uphills and light acceleration at 80-110 kmh.
    My guess is that the tune might have too aggressive spark tables at that RPM/load/TPS% -area, for E10 fuel atleast, I haven't tried putting premium in this and I won't either.
    So, no wonder the slip value wasn't showing anything if the trans wasn't slipping. It seems it was just misfires causing the jerkiness.
    I still want to adjust the line pressure to try and smooth out the shifts and adjust the TCC engage speed in 4th so it'd engage around 80kmh. With the stock tune it now engages at 88 kmh (55mph). 80kmh is a very common limit here.


    Among other things, I fixed the passenger front window guides, removed the old speakers and a shitton of crappy speaker wiring. Why shorten wires when you can just stuff 2 meters of speaker wire between the door and moisture barrier? There were some cheapo 4" speakers and tweeters jammed in the stock speaker buckets. I installed new 4x6 (factory size) speakers in both front doors, cleaned up the wiring and installed new door panel clips.
    Drivers window mechanism probably hadn't seen grease since it was made in '95. Bone dry...

    Also installed a cheap 18W led work light under the rear bumper, used the old fog light wiring so I didn't have to wire anything really. The light is purely for reversing, being able to see anything at all during the dark winter is pretty handy.
    Gonna figure out some aux high beams with a friend at some point, the lights on this car are absolute garbage. This two ton land whale isn't stopping too fast in the winter, so I'd like to see well atleast.
    Either 3x 9" round halogens or a 55cm 180W led bar from a friend. The big round lights would fit the car better, but are way more of a hassle to mount.

    Click image for larger version. 

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    Ordered a pair of the most powerful 9004 halogen bulbs off RA, aswell as some service items such as air and fuel filters.
    The car is going to the shop on monday. The oil filter is in a shitty spot for my tools so they're doing an oil change. Snagged a 5l can of Genuine GM 5W30 on sale, only the best for the Chev
    The oil pan is also causing the biggest oil leak, they'll tighten it a bit more if possible. They'll also check on the transmission mount and why the trans crossmember is wet, output seal is dry.


    Loadsa stuff.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  6. #106
    Lost and driftin' Arquemann's Avatar
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    Cool, just blew a rear brake line.
    Add one more thing for the shop's to do list.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  7. #107
    The Brown Blob 87gtVIC's Avatar
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    Better than blowing it after. Like you said...add it to the list.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
    My 2004 Mercedes Benz E320:The Benz

    Quote Originally Posted by ootdega View Post
    My life is a long series of "nevermind" and "I guess not."
    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  8. #108
    Lost and driftin' Arquemann's Avatar
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    Quote Originally Posted by 87gtVIC View Post
    Better than blowing it after. Like you said...add it to the list.
    Yup, happened to blow it less than 5 minutes from home. Futzing around a parking lot, late at night with some friends.
    Sucks to spend more money again, but I'm very glad the line blew now and in a somewhat controlled situation. Going on a 500+km cottage trip next weekend, would suck to blow a line 25km from the nearest paved road or way further from anything resembling a repair shop.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  9. #109
    The Brown Blob 87gtVIC's Avatar
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    Blew two brake lines on my cv ages ago. Once while going onto the emissions machine (when that was still a thing) for inspection. The other in my driveway. Both happened in a very safe manner/area.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
    My 2004 Mercedes Benz E320:The Benz

    Quote Originally Posted by ootdega View Post
    My life is a long series of "nevermind" and "I guess not."
    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  10. #110
    I'm an air-conditioned gypsy gadget73's Avatar
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    had one pop in my old truck just around the corner from the house. Turned around and came straight back home. At no point had I gotten over 25, and it was only the back brakes so I could still stop. I lost a fuel pump in that truck in the driveway too. One morning it just wouldn't start. Things break, but its awful nice when they break with 'convenient' timing.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  11. #111
    Lost and driftin' Arquemann's Avatar
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    I fetched the car from the shop earlier this week, they did the oil change and replaced the busted brake line.
    Apparently the line itself was some weird thick-walled stuff, which they didn't have in stock and had to go get it from elsewhere.

    They also confirmed that the trans mount is completely shot and torn, and that the front shocks are kinda done. Checked some leaks aswell, guy said the engine oil leak is from the timing cover / dizzy and not the oil pan. Wet trans crossmember is most likely just from the engine oil and not the trans leaking. I ordered new front shocks and a trans mount. 11.98 per shock on closeout from RA, Gabriel ProGuard, police/taxi spec. Local shops didn't have any HD shockss, only overpriced cheapo tier Gabriels.

    Installed the aux high beam this week aswell. Ended up buying the 180W LED bar from a friend. Trying to mount it nicely proved to be quite hard, so I went the crude yet effective route. Two M8 bolts right through the top of the bumper and into the crash bar.
    Sure it's a clean install, but I got (more) holes in my bumper now. The front license plate mount decided to shatter among the process, I've got the plate ziptied for now. I ordered new single row plates without the EU-tags, should fit and look better.
    Also installed the new Philips Nightguard Platinum bulbs I bought, old ones were already XtremeVisions. Conclusion is that I won't see SHIT with these headlights.

    Illegal yellow tint because I find yellowish light wayy easier on the eyes and seems to help visibility in the white winter.
    Still need to aim the LED and adjust the headlights a bit aswell.

    Attached Thumbnails Attached Thumbnails 20220929_121603.jpg  
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  12. #112
    I'm an air-conditioned gypsy gadget73's Avatar
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    thick walled line? hm, I thought GM used standard 1/4", unless its the armored crap. That looks like its got a steel wire wrapped around it, and to splice it you have to un-wrap the wire which usually doesn't actually work.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  13. #113
    Lost and driftin' Arquemann's Avatar
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    Quote Originally Posted by gadget73 View Post
    thick walled line? hm, I thought GM used standard 1/4", unless its the armored crap. That looks like its got a steel wire wrapped around it, and to splice it you have to un-wrap the wire which usually doesn't actually work.
    Eh, dunno. That's what he said to me. I don't think I've seen the spiral guarded line on this car.


    Anyways, cottage trip (again)! This time in the Chevy. Really takes the washboarded dirt roads like a champ, except everything rattles...
    Friday was cruise night, then saturday morning off to a car show and to the cottage from there. A night of rock n roll, beer and booze, got home today afternoon.

    Now I'm really noticing the effects of the stock tune vs the tune that was on the car. It doesn't jerk anymore, but the MPG took a considerable hit. 570km this weekend and the tank is empty, mostly highway driving at 80 to 110 kmh.
    I don't like the jerking but I really don't like the fact that the highway MPG went down by like 5 mpg...
    First I'll reflash the jerky tune back in and fill it with premium fuel, see how it does. Looking at the original tune on TunerPro, the spark tables are super spicy compared to stock.

    Click image for larger version. 

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    In the middle of nowhere, old ass cottage, friends and good times. And a dog! with the newest favourite chew toy, a piece of firewood.

    Attached Thumbnails Attached Thumbnails 20221002_120358.jpg  
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  14. #114
    Lost and driftin' Arquemann's Avatar
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    Through the process of elimination I have come to the conclusion that the jerkiness is caused by: the converter lockup.
    The factory tune just happened to hide it pretty well.

    Oh well. I'm not replacing a torque converter anytime soon, if at all for this car, so it'll be what it is for now.
    I will probably play around with the TCC engage/release maps and such to maybe have it release earlier and with less TPS%.

    Also replaced the old ill-fitting license plates and put in a new air filter. New front shocks and trans mount came in, those plus the fuel filter on the to-do list for this year. The trans mount might be a thing for a shop to do, it seems like a proper PITA.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  15. #115
    I'm an air-conditioned gypsy gadget73's Avatar
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    if someone did work on this, its quite likely the pulse-modulated converter lockup has been deleted. It was a common thing, mostly because the PWM lockup roasts the lockup clutch. When that is deleted it engages and disengages the converter like an extra gear. Its done in the transmission, don't know the fine points but apparently its quite simple to do.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  16. #116
    Stow It! GM_Guy's Avatar
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    On shifts, without being able to feel what you are describing, it is something that is usually wanted on this side of the ocean when one builds up a trans. Firmer = faster shift & engagement. Unless its doing it under light throttle, don't worry about it for the winter. I've never had issues with any of my trans that shifted hard enough to snap your neck. Our golden yardstick in the old days was if it can't scratch the tires (squak the tires) during the 1-2 shift, its not firm enough. If you are scratching them on the 2-3, you've got everything you can out of it. =-)

  17. #117
    I'm an air-conditioned gypsy gadget73's Avatar
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    The 1-2 in my S10 was a bit too much, it would regularly bark the tires on a 1-2 on dry road at anything over about half throttle. Kind of a pain in the ass in the winter on snow.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  18. #118
    Lost and driftin' Arquemann's Avatar
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    Well, new front shocks installed, trans mount fixed. I did the fuel and air filters also.
    I utterly lost my patience last week trying to replace the shocks myself and took the car to the friend's shop last night.
    Canadian winters + Finnish winters = rust, a lot of it.

    Nevermind what I said about the trans mount previously, it is actually intact, but it wasn't exactly "attached" like it should. Or attached really at all...
    But now it is and it made a noticeable difference in low throttle upshifts, less of a slam and more of a firm shift now.

    New front shocks made a very satisfying improvement aswell. Absolutely not too firm even though being HD versions of already police spec shocks, just mint.
    I guess it really helps that the shock fluid is inside the shocks, not on the outside and around the general area


    A few things to do still:
    - Remove cluster and clean dash contacts
    - Remove bulb from "CHANGE OIL" -light (fkn annoying and reset procedure doesn't work)
    - Grease joints when it's time to change to winter tires

    Hopefully she'll serve me well for the winter. Inspection is in December and I really don't want any more surprises.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

  19. #119
    I'm an air-conditioned gypsy gadget73's Avatar
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    did the old mount have the rubber separate from the metal part? Thats usually how they fail, often mixed with a fluid leak so it turns the rubber into black mushy goo.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  20. #120
    Lost and driftin' Arquemann's Avatar
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    Quote Originally Posted by gadget73 View Post
    did the old mount have the rubber separate from the metal part? Thats usually how they fail, often mixed with a fluid leak so it turns the rubber into black mushy goo.
    No no, the mount was intact, like I said. The rubber is fine, bolts not so much. One was missing, bottom nut was tight, the other upper was loose.
    The old mount is still in there, now attached properly. The mechanic (friend) said that it was definitely good to reuse, also it'd be an absolute PITA to replace. The crossmember is basically a deeeeeep cradle and the mount is at the bottom, under the tail housing. He said it might be barely possible to replace it without dropping the crossmember. And to drop the crossmember, the exhaust has to be removed.
    1985 Mercury Grand Marquis LS, "Maisa"
    1995 Chevrolet Caprice Classic STW, "Sally"

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