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Thread: This just hasn't been my year with this thing...More problems.

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    Senior Member SexySilhouette's Avatar
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    Default This just hasn't been my year with this thing...More problems.

    After 6 years of mostly solid reliability, the van -1995 Olds Silhouette L27 3.8 - may be parked permanently...The transmission has been rebuilt, the A/C system has been completely replaced, new LIM, new plenum, new ICM, new brakes all the way around, new front hubs, new tires and more.

    Lately I've been having a bad hesitation. I've put in new plugs, wires, coils, ICM, crank sensor, cam sensor, related wiring, done a compression test, fuel pressure test, checked it on TunerPro RT, and it's still there.

    It also "pounds" at cruising speed. Like the TCC is stuck, It goes away if I tap the brake pedal or accelerate, but gets worse at deceleration.

    Plus the A/C is still leaking, it takes about 2 weeks for it all to leak out. I've put dye in and nothing shows up.

    So I guess I'll ask here before giving up.
    Jay



  2. #2
    Senior Member Duke George V's Avatar
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    Have you cleaned the MAF recently? What kind of gas do you use?

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    Senior Member 85_Ciera_Rebuild's Avatar
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    Quote Originally Posted by SexySilhouette View Post
    bad hesitation...."pounds" at cruising speed.
    Hook vacuum gauge up to a true intake vacuum....drive around, and notate vacuum readings at idle, light load, heavy load, and deacceleration.

    Unplug brake booster's vacuum-line, and plug it off....here where stopped at home, check vacuum at idle, and at a higher RPM....then unplug brake booster's vacuum-line and plug it. Then recheck vacuum readings at idle and higher rpm. Also, drive it, but check to make sure you can stop it with your foot before going faster.

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    Senior Member SexySilhouette's Avatar
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    Quote Originally Posted by Duke George V View Post
    Have you cleaned the MAF recently? What kind of gas do you use?
    Yes...I run 89.
    Jay

  5. #5
    Senior Member 85_Ciera_Rebuild's Avatar
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    Intermittent Hesitation While Accelerating or While Cruising

    An intermittent chuggle or hesitation that can be felt during light acceleration or while cruising at highway speeds with no Check Engine light or no fault codes set may be caused by intermittent operation of the automatic transmission torque converter clutch (TCC). The problem is not the torque converter clutch or clutch solenoid, but a faulty input to the powertrain control module computer from the engine's throttle position (TPS) sensor. The fix for this problem is to replace the TPS sensor.

    Vehicles that may be affected by this include the following:
    1995-1999 Buick Riviera
    1995-2004 Buick Regal
    1995-2005 Buick LeSabre, Park Avenue
    1997-2005 Buick Century
    1995-2001 Chevrolet Lumina
    1995-2002 Chevrolet Camaro
    1995-2005 Chevrolet Monte Carlo
    2000-2005 Chevrolet Impala
    1995-1997 Oldsmobile Cutlass Supreme, Ninety Eight
    1995-1999 Oldsmobile Eighty Eight
    1998-2002 Oldsmobile Intrigue
    1995-2002 Pontiac Firebird
    1995-2003 Pontiac Grand Prix
    1995-2005 Pontiac Bonneville
    with 3800 V6 Engine (VIN K - RPO L36)

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    Senior Member 85_Ciera_Rebuild's Avatar
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    Quote Originally Posted by sexysilhouette View Post
    i've put in new ...

    tps....yes?

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    Senior Member SilentWing's Avatar
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    As far as the AC goes did you check your evaporator/evaporator drain to see if that's where it's leaking from? That's a common place to check if you can't find the dye...

  8. #8
    Senior Member SexySilhouette's Avatar
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    Quote Originally Posted by 85_Ciera_Rebuild View Post
    Intermittent Hesitation While Accelerating or While Cruising

    An intermittent chuggle or hesitation that can be felt during light acceleration or while cruising at highway speeds with no Check Engine light or no fault codes set may be caused by intermittent operation of the automatic transmission torque converter clutch (TCC). The problem is not the torque converter clutch or clutch solenoid, but a faulty input to the powertrain control module computer from the engine's throttle position (TPS) sensor. The fix for this problem is to replace the TPS sensor.

    Vehicles that may be affected by this include the following:
    1995-1999 Buick Riviera
    1995-2004 Buick Regal
    1995-2005 Buick LeSabre, Park Avenue
    1997-2005 Buick Century
    1995-2001 Chevrolet Lumina
    1995-2002 Chevrolet Camaro
    1995-2005 Chevrolet Monte Carlo
    2000-2005 Chevrolet Impala
    1995-1997 Oldsmobile Cutlass Supreme, Ninety Eight
    1995-1999 Oldsmobile Eighty Eight
    1998-2002 Oldsmobile Intrigue
    1995-2002 Pontiac Firebird
    1995-2003 Pontiac Grand Prix
    1995-2005 Pontiac Bonneville
    with 3800 V6 Engine (VIN K - RPO L36)
    Quote Originally Posted by 85_Ciera_Rebuild View Post
    tps....yes?
    Mine is a VIN L Series I 3.8 but yes, that was the first thing I checked and it tested fine.

    Quote Originally Posted by SilentWing View Post
    As far as the AC goes did you check your evaporator/evaporator drain to see if that's where it's leaking from? That's a common place to check if you can't find the dye...
    I did and nothing there.
    Jay

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    Senior Member 85_Ciera_Rebuild's Avatar
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    Quote Originally Posted by SexySilhouette View Post
    Mine is a VIN L Series I 3.8 but yes, that was the first thing I checked and it tested fine.
    Well replace it....

    For a transmission shop that has Snap-On tester, they could do a check ride, and see what's happening.

  10. #10
    Senior Member Duke George V's Avatar
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    Quote Originally Posted by SexySilhouette View Post
    Yes...I run 89.
    Octane doesn't really factor in to it. If you're running unbranded stuff from the local Gas 'N Go or whatever, it's probably clogging up your injectors. Chevron and Shell have really good detergent additives. You could also throw a "21 gallon" bottle of Techron into the tank next time you fill up (before you put gas in). How about your fuel filter?

  11. #11
    Senior Member 85_Ciera_Rebuild's Avatar
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    Quote Originally Posted by SexySilhouette View Post
    Mine is a VIN L Series I 3.8...
    Info U get on internet is not complete....I would buy a new TPS, and install it.

    Also, have you disconnected battery for say 24 hours? Assuming your ECM dumps datapoints.

  12. #12
    Senior Member 85_Ciera_Rebuild's Avatar
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    Quote Originally Posted by SexySilhouette View Post
    Like the TCC is stuck, It goes away if I tap the brake pedal or accelerate
    In this diagram located here, I would disconnect wire going to TCC solenoid, if this is the case for your vehicle...I don't know how ECM in your vehicle gets signal to turn off TCC solenoid, so look at vehicle's wiring diagram.

  13. #13
    Senior Member SexySilhouette's Avatar
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    Quote Originally Posted by Duke George V View Post
    Octane doesn't really factor in to it. If you're running unbranded stuff from the local Gas 'N Go or whatever, it's probably clogging up your injectors. Chevron and Shell have really good detergent additives. You could also throw a "21 gallon" bottle of Techron into the tank next time you fill up (before you put gas in). How about your fuel filter?
    Ah, I run Valero usually. Chevron if I'm around there. Just changed the filter 2 weeks ago.
    Jay

  14. #14
    Senior Member SexySilhouette's Avatar
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    New TPS and it is just as bad. Anyone else?
    Jay

  15. #15
    Senior Member 85_Ciera_Rebuild's Avatar
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    Quote Originally Posted by SexySilhouette View Post
    New TPS and it is just as bad. Anyone else?
    Brake Switch...are there dual wires there? One for brake lights, and one to let transmission know to kick out lockup torque converter?

    Disconnect or Connect it, which ever it is...so transmission does not engage lockup.

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