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  1. #31
    Community Manager White93z34's Avatar
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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    so here is a dumb question, did you replace the spark plugs when you did the headgaskets?

    as for the running hot, what does the actual gauge say? and are you getting a SES light?
    -Chris D. - Your Community Manager

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  2. #32

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    It does not run hot any more and has never thrown a code. (It took awhile to get the coolant purged). Yes i did. I am on the 3rd set of plugs. I was asked this before

    Quote Originally Posted by R Dubya
    So without me having to search through everything you wrote could you please enlighten me of whether or not you changed the spark plugs? Black means rich, which means you had a vac leak or some other catalyst for running rich.

    It's not gonna throw a code for a misfire because its a '94 (I think, never dealt with one yet). If they were black I would suggest replacement of all 6 if you didn't do it before.
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  3. #33
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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    I had the exact same problem happen to me on a 95 supreme coupe search my posts.



  4. #34

    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    Quote Originally Posted by KCFITZ78
    It does not run hot any more and has never thrown a code. (It took awhile to get the coolant purged). Yes i did. I am on the 3rd set of plugs. I was asked this before

    Quote Originally Posted by R Dubya
    So without me having to search through everything you wrote could you please enlighten me of whether or not you changed the spark plugs? Black means rich, which means you had a vac leak or some other catalyst for running rich.

    It's not gonna throw a code for a misfire because its a '94 (I think, never dealt with one yet). If they were black I would suggest replacement of all 6 if you didn't do it before.
    So you mean to tell me that your overheating was because of purging the coolant? So even after I told you that, and you gave me the attitude, that I was right?


    Quote Originally Posted by KCFITZ78
    THE COOLANT IS CYCLING, WATER PUMP SPINS, AND THERMOSTAT OPENS. ALL WAS REPLACED WITHIN THE LAST 4 MONTHS TOO. I AM MORE WORIED ABOUT THE SOMETIMES HARD START UP, ROUGH IDLE, AND THE FACT ONCE I PUT IT IN GEAR IT WILL STALL. THE FACT THAT ENGINE GETS HOT IS NOT A COOLING PROBLEM, IT GETS HOT BECAUSE IT IS NOT RUNNING AS IT SHOULD.
    Yeah, it's still on the road. 219,982 mi


  5. #35

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    Possible title name? Having trouble finding any post for you.

    Quote Originally Posted by IRONDOG442
    I had the exact same problem happen to me on a 95 supreme coupe search my posts.


    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  6. #36

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    It wasn't an attitude. I use all caps at work on blueprint drawings so it was a mistake. (I am human) And as far a i knew the coolant was purged. I left the radiator cap off over night and other opening hoping any air to rise out of the coolant lines.
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  7. #37

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    sounds like my cars. all 4 of 'MY' cars.


    what brand of plugs? boschs foul out immediately in our cars.

    To ensure no air exists in you eninge coolant passages. the best(easiest) place to see the highest point of coolant on the 3100 motor is where the engine temperature sensor is located, angling up towards the front right next to the thermostat. Pull that out and make sure you have coolant visible through the port. If in doubt about the reliablility or age of the temp sensor, replace it.


    I had one 3.1 car that would not start after a LIM change. I think I left the kleenexs I used to block the ports in the engine. smoked like $#!+ for a bit once it started. They were sucked into the enigine and had to be burned out :P


    BUILDER AND DESTROYER OF FINE(?) AMERICAN CARS.

  8. #38
    Forum Moderator digitaloutsider's Avatar
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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    Did you replace the wires? Try a known ICM/coilpack set?
    2006 Nissan Altima SE-R 3.5L 214ci VQ35DE DOHC 60 V6 | 6MT
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  9. #39

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    For plugs, 2 sets of copper ac delcos burnt up and now I have regular copper champions in.

    Also as a side note, I did replace the temp sensor. I broke the wires off while working on it. When i had the overheating problem way back in the summer I bought one when I put a new radiator and water pump in. I never replaced it because i lost it. Good thing I found it even if the car runs like crap.
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  10. #40

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    a way to find intake leaks, if that might be the current probelm is to spray...uhh starting fluid? ... around teh intake gaskets while your engine is running. If you engine reacts, it shows you do have a leak. sort of the same with a busted vaccum line.


    I'm itching to say you have a vac leak somewhere.


    BUILDER AND DESTROYER OF FINE(?) AMERICAN CARS.

  11. #41

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    Why replace wires when the deliver spark, and why replace coils when they produce spark? Wires and coils were replaced 2 1/2 yrs ago. Maybe my multi meter needs replaced because it could be giving fasle values. <-----now thats attitude
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  12. #42

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    Hope this helps so i don't have to answer the same questions that i have asked myself. Sorry i know this is a long read but i think everything has been done that can be without pulling the engine and doing a rebuild.

    Quote Originally Posted by KCFITZ78
    I have no idea and I give up on this engine. I am junking the car. I don't have a place to store and work on the car so there is no reason for me to keep it. I have been all over this and only thing left to do is pull the engine and do a rebuild because something must be broke. Will never know!!!

    Checklist
    -no visable leaks, good
    -sprayed ether and no vaccum leaks, good
    -vaccum tested and was fine, 17", good
    -pulled valve covers and checked bent rods, good
    -blocked off egr in case egr was stuck open, good
    -dissconnected cat in case cat was pluged, good
    -compression tested 150 to 160 psi throughout all cylinders, good
    -checked coils, good
    -checked wires for spark, good
    -rechecked firing order, good
    -black plugs, put in new plugs

    Car will idle, but rough. Also there is a knock in the engine but it is not consitant. Was able to drive bout 250 yards, but was down a cylinder or two.

    Anyone want to make any offers? Will make a post by end of week w/ pics, car options, replaced parts, and any history as long as I had it.
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  13. #43

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    This is what I have left to try to get it running:

    -check fuel injectors? (use multimeter)
    -check fuel injector fuse?
    -idle relearn? (if mine can do that)
    -clean and check IAC?
    -check any other fuses?
    -look for pinched or bad wires?
    -use seafoam and watch it die and never restart…..hahahahahahahaha
    ..............If i do i'll be sure to get video so you can see the engine blow, that would be good for it to blow so i know its past the point of no return
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

  14. #44
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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    Quote Originally Posted by KCFITZ78
    Possible title name? Having trouble finding any post for you.

    Quote Originally Posted by IRONDOG442
    I had the exact same problem happen to me on a 95 supreme coupe search my posts.



    FOUND IT !!!! http://www.w-body.com/forum/index.ph...html#msg544741

  15. #45

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    Re: I GIVE UP,'94 GP SE 3100 SFI LIM Repair, I GIVE UP!!!!

    So your mechanic said bad fuel injector or bad pigtail. Did you ever dig into it? I have't checked that becuase my plugs where black so I felt I was getting fuel. I have it on the check list to check injectors but will also check the pigtail to the injectors too. Thanks, this wil be the last thing I check and then its gone if that doesn't work!
    1994 Pontiac Grand Prix SE<br />-3100 SFI V6 191ci, Code M, 4T60-E, Cold air intake, Custom coil overs and Red <br />2004 Chevy Monte Carlo LS<br />-3400 SFI V6, Blue<br />

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