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Thread: Happy to join this community! Mostly looking for help though...

  1. #101
    Wagon Addicted Tiggie's Avatar
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    It sounds like the mechanic is throwing parts at it, which is a good diet plan for your wallet as you have discovered.

    There are three threads in the Box Tech/Electrical forum with CFI to SEFI conversion posts. From what I gather, on the 84/85 it’s not that bad but you do need a donor. Donor cars here are getting hard to find, so I bet there it’s near impossible up there. You would probably need someone in the US to put together a conversion package for you and send it up your way.

    If the car is a daily driver, I would strongly consider the SEFI if we can figure out a way to get parts to you. I have been driving my 88 SEFI daily for 12 years and it has never failed to start, run nicely, and take me where I need to go.

    If the car is an occasional driver and you prefer the carb, run it.
    1988 Crown Vic Wagon - daily
    1990 Country Squire - weekend cruiser, former lawn ornament
    Other: 95 Ranger, 74 F250, 68 Mustang, 94 Mustang
    Sold: 1982 LTD and 1987 Crown Vic

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  2. #102
    Member Arquemann's Avatar
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    As is, the car seems to have two issues; breaking up / misfiring at idle and low throttle and the very rich fuel mixture.

    From the ignition side, plugs, plug wires, coil has been checked good, TFI module and distributor (all parts) changed, and the wiring has been gone through. Base timing adjusted to correct 10BTDC, should check timing chain for looseness. ECM left.
    Fuel: New injectors, pressure regulator, fuel pressure is good, new oxygen sensor, new ect sensor, act sensor checked good, thermactor system supposedly works good, egr probably too. (@kishy would you kindly?)

    Car was supposed to be a daily driver, I certainly wouldn't mind the new car -esque starting and throttle response, I'm guessing the EFI (mass-air?) ECM is programmable and won't go batshit crazy about a thermactor delete or such. The big plus for the carb is that it's simple, easily attainable and I somewhat know how to work on one. Then there's the cold starting, driveability, and (lack of) fuel economy... Not a fan of the EFI massive upper intake, but that's the least of my problems.
    I'm getting a ~500€ winter beater soon, since the MGM needs rustproofing and studded tires, which would cost at least as much

  3. #103
    Beater gonna beat sly's Avatar
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    A well tuned carb would probably work fine as a daily, even on colder days with a 10-15 minute warm up time. The only thing you would need to know is how much to adjust it for large changes in altitude. Wide band oxygen sensor would help loads with tuning... though a voltmeter on the stock sensor and a carb with the ability to adjust mixtures while running would also work well.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 88 MGM (SOLD), 93 Vic, 2000 Crown Vic, 2003 Expedition
    Quote Originally Posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
    Quote Originally Posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

  4. #104
    Member Arquemann's Avatar
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    What kind of symptoms does a loose timing chain emit in these cars? Or just same shit as with everything else?

    I've been discussing with the mechanic, he's been opening up the wire looming to check for faulty wiring, but nothing yet, there doesn't seem to be many possible culprits left, other than the wiring which so far seems "fine". A faulty ECM? That could fix both of the issues, if that's it. I'll also be discussing about all the parts he's gone through, since it's kinda absurd to charge me alot for things that didn't fix shit.

    I've been browsing local forums and marketplaces, I'm sure I could source an EFI intake manifold somewhat cheap, other things to find locally would probably be the headers and the throttle body, since they weight alot and private freight is expensive, unless it comes by ship, but that takes for bloody ever. Wiring, sensors and linkages would probably be easier and cheaper to get from the States.

    Quote Originally Posted by sly View Post
    A well tuned carb would probably work fine as a daily, even on colder days with a 10-15 minute warm up time.
    What does "colder days" mean when said by a texan? Where I live in Finland, mean temperature is below freezing for 3-4 months a year, the colder days last winter were around -20C/-4F, peaking at -30C/-22F. Not exactly the most carb-friendly climate eh? Considering my commute is about 20 minutes, 10-15 min warm up is a bit steep. I intended to winter drive it, but probably not if I go carb. I'm getting a winter beater for this winter, next summer I'll get the GMQ properly rust-proofed and get some winter tires (and a block heater probably too) for it.

    Altitude changes are a definite non-issue in Finland:
    Click image for larger version. 

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  5. #105
    Beater gonna beat sly's Avatar
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    Down to -40C with a block heater on it. I'd say down to at least -20C without a block heater as I've seen -4F here in Texas (yeah, sometimes it does actually get COLD here) when I had an 1985 Pontiac Parisienne (Chevy Caprice) with a 305 and quadrajet carb. Cranked right up, but didn't run well until the engine got above freezing. Stayed in high idle almost all the way to work. I did have to give it 10-15 minutes to warm up before it would not die going into gear though. That was about it.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 88 MGM (SOLD), 93 Vic, 2000 Crown Vic, 2003 Expedition
    Quote Originally Posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
    Quote Originally Posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

  6. #106
    Member Arquemann's Avatar
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    Oh boy, new ECM in and the misfire is still there, apparently the fuel mixture isn't as rich anymore, but still way too rich.
    For whatever reason, they still haven't checked the timing chain, but it'll be checked tomorrow.
    He also mentioned that there's a little bit of valve train noise when the oil is properly warmed up. Maybe a rocker adjustment is loosening up after 100k miles, I don't know and I just want my car back at this point. These things do have hydraulic lifters yes?

    All wiring has been thoroughly gone through and pretty much every ignition-related part has been changed or checked good...
    If it's the damn timing chain that's causing all this, I'll be demanding some sort of discount for all this damn time and parts thrown at the car, as it was one of the things on my to-check list when I originally dropped off the car.

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