engine stutter on 1994 fwb
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, engine stutter on 1994 fwb in Past Cadillac Vehicle Discussion; hi all, i'm having an intermittent engine stutter on my 94 fwb. it usually starts around 45 and up, and ...
  1. #1
    newside is offline Cadillac Owners Fanatic
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    engine stutter on 1994 fwb

    hi all, i'm having an intermittent engine stutter on my 94 fwb. it usually starts around 45 and up, and on hills. when i accelerate from cruising it will stutter. what i have done to the vehicle is, change the tranny fluid and filter, change the fuel filter, replaced the intake gasket, replace air filter and engine oil. i checked the engine at night for arching around the plug wires. i was thinking about the torue converter lock-up as a possiblity. any impute would be appreachiated. thanks

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  3. #2
    sven914 is offline Cadillac Owners Connoisseur
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    Re: engine stutter on 1994 fwb

    Try replacing the plugs and wires.

  4. #3
    Stingroo's Avatar
    Stingroo is offline Wagon/Audio Enthusiast
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    Re: engine stutter on 1994 fwb

    Check your EGR valve.

  5. #4
    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: engine stutter on 1994 fwb

    Replace coil wire only, first. Inspect, clean, lube connections for the coil/ICM.

  6. #5
    newside is offline Cadillac Owners Fanatic
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    Re: engine stutter on 1994 fwb

    Quote Originally Posted by jayoldschool View Post
    Replace coil wire only, first. Inspect, clean, lube connections for the coil/ICM.
    ok, thanks guys. i'll try these suggestions. i just got the carburator done on my 79 deville. it's one thing after another. lol, thanks again

  7. #6
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: engine stutter on 1994 fwb

    Quote Originally Posted by newside View Post
    ok, thanks guys. i'll try these suggestions. i just got the carburator done on my 79 deville. it's one thing after another. lol, thanks again
    Keep us updated. I have had exactly the same issue for two years. Still looking for possible cause...

  8. #7
    Wheelman322's Avatar
    Wheelman322 is offline Cadillac Owners Enthusiast
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    Re: engine stutter on 1994 fwb

    Possibly a bad Optispark...I know the LT1 engine was known for that.

  9. #8
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: engine stutter on 1994 fwb

    Quote Originally Posted by jayoldschool View Post
    Replace coil wire only, first. Inspect, clean, lube connections for the coil/ICM.
    I have checked the coil wire on my 95 LT1 and it was super clean. The resistance was 2.5 kOhm, which is normal for a 12" plug wire. The ICM area was superclean as well. Probably the wire is not MY problem. Will keep investigating.

  10. #9
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: engine stutter on 1994 fwb

    Can you power through it? For example, will it stop "stuttering" when you give it more gas? If so, it's probably the TCC solenoid.

    If it's not missing/stuttering under any other circumstances, it's probably the solenoid not holding and thus allowing the converter to lock/unlock rapidly until the PCM calls for a TCC unlock.

  11. #10
    newside is offline Cadillac Owners Fanatic
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    Re: engine stutter on 1994 fwb

    turbojimmy, i can power through the stutter. i checked the wires and they have been replaced, the icm is clean, no corrostion. i think it is the tcc solenoid as the car runs excellent throughout it's operating ranges.

  12. #11
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: engine stutter on 1994 fwb

    Quote Originally Posted by newside View Post
    turbojimmy, i can power through the stutter. i checked the wires and they have been replaced, the icm is clean, no corrostion. i think it is the tcc solenoid as the car runs excellent throughout it's operating ranges.
    Do not jump to conclusion yet... Have you ever checked your exhaust manifold bolts and studs? If you have not done it , the chances are you will find some of them loose, missing or snapped/sheared off... A very common problem of all LT1 engines. I have recently tightened only two bolts on the driver side because I saw small exhaust leak - bubbles coming from the edge of the gasket when some water was sprayed over it. That leak is gone and believe it or not he throttle response is better now. I cannot say for sire that my stutter is history, but it has not occurred today under conditions it usually would do. Check the bolts. Replace them with grade 8 flange hex bolts black finish. You need 3/8"-16 x 1.000" and 3/8"-16 x 1.500" bolts. See if it helps.

  13. #12
    newside is offline Cadillac Owners Fanatic
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    Re: engine stutter on 1994 fwb

    ok guys, been awhile since i've got back to this problem. i replaced the tcc lockout solinoid with no luck. i tightened the exaust manifold bolts with no results so now i'm going after the plugs and wires

  14. #13
    thefleetwoodguy is offline Cadillac Owners Enthusiast
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    Re: engine stutter on 1994 fwb

    wires

  15. #14
    drmenard is offline Cadillac Owners Enthusiast
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    Re: engine stutter on 1994 fwb

    If it's not the wires its the cap and rotor... But more than likley it will take plugs, wires ,cap and rotor...

  16. #15
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: engine stutter on 1994 fwb

    Quote Originally Posted by newside View Post
    ok guys, been awhile since i've got back to this problem. i replaced the tcc lockout solinoid with no luck. i tightened the exaust manifold bolts with no results so now i'm going after the plugs and wires
    I believe it is in human nature... starting with the most difficult part! lol

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