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    #1

    1991 spark knock...

    OK, Got a slight problem with my 91... Want to see if anyone can give me a clue as to what is the problem...

    When it is under 70 degrees outside... my car spark knocks like a bitch... And gets worse if I idle for a few minutes... Or turn a right hand corner... Then it sounds like it is about to blow up! However, when it is warm outside... it drives perfectly normal...

    I have checked the computer for trouble codes... No codes in the computer, no warning lights... and the timing is right on the money... (And has less than 10,000 miles since the timing chain was replaced)

    Any ideas???


    Tom....


    Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
    Agent Tony DiNozzo… It only seems longer….

    http://www.tomspolicecars.com/
    Tags: None
    #2
    Did you get a code 11 when you pulled the codes? Code 11 means everything is okay and if you didn't get it, you either didn't pull the codes correctly or the computer (or wiring to it) is screwed.

    Otherwise, maybe the EGR valve?
    1990 Country Squire - under restoration
    1988 Crown Vic LTD Wagon - daily beater

    GMN Box Panther History
    Box Panther Horsepower and Torque Ratings
    Box Panther Production Numbers

    Comment

      #3
      i've been having the same problem lately.. Im almost convinced its the shitty gas they sell us.
      Give a man a fish and he will be fed for a day. Teach a man to fish and he will promptly forget that he once did not know, and proceed to call anyone who asks, a n00b and flame them on the boards for being stupid.

      Comment

        #4
        Join the club. I've been having the same damn problem for twoweeks now. I have adjusted the timing alot, and still have pinging. Its starting to piss me off...
        **2012 Ford Mustang Boss 302: 5.0/ 6 spd/ 3.73s, 20K Cruiser
        **2006 MGM,"Ultimate": 4.6/ 2.73/ Dark Tint, Magnaflows, 19s, 115K Daily Driver
        **2012 Harley Davidson Wide Glide (FXDWG):103/ Cobra Speedsters/ Cosmetics, 9K Poseur HD Rider
        **1976 Ford F-150 4WD: 360, 4 spd, 3.50s, factory A/C, 4" lift, Bilsteins, US Indy Mags, 35s Truck Duties

        Comment

          #5
          Is your EGR clogged? What about your cats (if you have them)?
          Originally posted by gadget73
          There is nothing more permanent than a temporary fix.
          91 Mercury CP, Lopo 302, AOD, 3.08LSD. 3g upgrade, Moog wagon coils up front, cc819s in the back. KYB GR-2 police shocks. Energy suspension control arm bushings. Smog deleted.
          93 F-150 XLT, 302, ZF 5-spd from 1-ton, 4wd.
          Daily--07 Civic Coupe. Bone stock with 25k miles
          Wife--14 Subaru Outback. 6-speed.
          95 Subaru Legacy Wagon--red--STOLEN 1/6/13

          Comment

            #6
            Originally posted by P72Ford View Post
            Join the club. I've been having the same damn problem for twoweeks now. I have adjusted the timing alot, and still have pinging. Its starting to piss me off...
            X3 mine is spark knocking like a whore to, it didint do it before but all of a sudden it is now for the past few weeks, but im getting a god awful smell comming from the engine compartment when it dose it

            Comment

              #7
              Like I said, no TROUBLE codes.. Do not know if the code 11 was there.. My mechanic did it with his Snap On code reader... and he said no trouble codes were set. As far as the cats they are ok as far as I know... I will be doing some more checking on this after I get the 84 in the shop for the four barrel conversion.. then when I get the car out, I will have something to drive while I check this out... I have tried putting super unleaded in the car... it still does it, but not as bad... I may replace the egr valve... it probably needs it. The one on the car is probably the original...


              Agent Caitlin Todd… You know Tony, Statistics show that married men live longer…
              Agent Tony DiNozzo… It only seems longer….

              http://www.tomspolicecars.com/

              Comment

                #8
                I have the EGR disconnected at this point. I don't think the cats are plugged...
                **2012 Ford Mustang Boss 302: 5.0/ 6 spd/ 3.73s, 20K Cruiser
                **2006 MGM,"Ultimate": 4.6/ 2.73/ Dark Tint, Magnaflows, 19s, 115K Daily Driver
                **2012 Harley Davidson Wide Glide (FXDWG):103/ Cobra Speedsters/ Cosmetics, 9K Poseur HD Rider
                **1976 Ford F-150 4WD: 360, 4 spd, 3.50s, factory A/C, 4" lift, Bilsteins, US Indy Mags, 35s Truck Duties

                Comment

                  #9
                  fuel filter? Fuel pressure ok?
                  Builder/Owner of Badass Panther Wagons

                  Busy maintaining a fleet of Fords

                  Comment

                    #10
                    Its bullshit, thats what it is. Three of my friends at school are all experiencing the same in there cars (none of which are Panthers; two are carbureted). Its the fucking dog piss the oil companies are selling us.
                    **2012 Ford Mustang Boss 302: 5.0/ 6 spd/ 3.73s, 20K Cruiser
                    **2006 MGM,"Ultimate": 4.6/ 2.73/ Dark Tint, Magnaflows, 19s, 115K Daily Driver
                    **2012 Harley Davidson Wide Glide (FXDWG):103/ Cobra Speedsters/ Cosmetics, 9K Poseur HD Rider
                    **1976 Ford F-150 4WD: 360, 4 spd, 3.50s, factory A/C, 4" lift, Bilsteins, US Indy Mags, 35s Truck Duties

                    Comment

                      #11
                      Be wary of the "octane booster" additives that are out there. Running those additives and the "fuel injector cleaner" additives plugged my cats up, no matter what they say on the back of the bottle about how it's safe for cats. Since this problem cropped up on my car a couple years ago, even though we fixed both the egr and the cats, I've been running premium. Although my dad, who's been driving it lately, says that it's running fine on regular. Costco gas FTW.
                      Originally posted by gadget73
                      There is nothing more permanent than a temporary fix.
                      91 Mercury CP, Lopo 302, AOD, 3.08LSD. 3g upgrade, Moog wagon coils up front, cc819s in the back. KYB GR-2 police shocks. Energy suspension control arm bushings. Smog deleted.
                      93 F-150 XLT, 302, ZF 5-spd from 1-ton, 4wd.
                      Daily--07 Civic Coupe. Bone stock with 25k miles
                      Wife--14 Subaru Outback. 6-speed.
                      95 Subaru Legacy Wagon--red--STOLEN 1/6/13

                      Comment

                        #12
                        Mine has pinged since I replaced the original engine. I've given up trying to understand why, there is no logical reason for it. It doesn't ping any worse now than it ever has though, and I filled up with 10% ethanol stuff last tank.
                        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 grandpa spec white and cranberry

                        1984 Lincoln Continental TurboDiesel - rolls coal

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

                        Everything looks like voodoo if you don't understand how it works

                        Comment

                          #13
                          Well, I will be playing with my car more next week, and maybe I can figure something out (I need to get a tuning kit, etc). I'm not interested in running premium though; I shouldn't have to with a whopping 8.3:1 CR.
                          **2012 Ford Mustang Boss 302: 5.0/ 6 spd/ 3.73s, 20K Cruiser
                          **2006 MGM,"Ultimate": 4.6/ 2.73/ Dark Tint, Magnaflows, 19s, 115K Daily Driver
                          **2012 Harley Davidson Wide Glide (FXDWG):103/ Cobra Speedsters/ Cosmetics, 9K Poseur HD Rider
                          **1976 Ford F-150 4WD: 360, 4 spd, 3.50s, factory A/C, 4" lift, Bilsteins, US Indy Mags, 35s Truck Duties

                          Comment

                            #14
                            Originally posted by P72Ford View Post
                            I'm not interested in running premium though; I shouldn't have to with a whopping 8.3:1 CR.
                            True dat. I'm no expert in this area, but a common cause of this is a combustion chamber temperature being too high, right? Could this be happening because a coolant passage to a head is blocked or something?
                            Last edited by 91waggin; 05-07-2008, 02:24 PM. Reason: I fail at typing
                            Originally posted by gadget73
                            There is nothing more permanent than a temporary fix.
                            91 Mercury CP, Lopo 302, AOD, 3.08LSD. 3g upgrade, Moog wagon coils up front, cc819s in the back. KYB GR-2 police shocks. Energy suspension control arm bushings. Smog deleted.
                            93 F-150 XLT, 302, ZF 5-spd from 1-ton, 4wd.
                            Daily--07 Civic Coupe. Bone stock with 25k miles
                            Wife--14 Subaru Outback. 6-speed.
                            95 Subaru Legacy Wagon--red--STOLEN 1/6/13

                            Comment

                              #15
                              High combustion temps can lead to this. Not if a blocked cooling passage would cause that, but I suppose its possible. But, I know none of my coolant passages are blocked; I just put this intake on last month.
                              **2012 Ford Mustang Boss 302: 5.0/ 6 spd/ 3.73s, 20K Cruiser
                              **2006 MGM,"Ultimate": 4.6/ 2.73/ Dark Tint, Magnaflows, 19s, 115K Daily Driver
                              **2012 Harley Davidson Wide Glide (FXDWG):103/ Cobra Speedsters/ Cosmetics, 9K Poseur HD Rider
                              **1976 Ford F-150 4WD: 360, 4 spd, 3.50s, factory A/C, 4" lift, Bilsteins, US Indy Mags, 35s Truck Duties

                              Comment

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