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#1
08-14-2009, 09:16 PM
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I have a miss I can't figure out
My '02 Grand Prix, 196K miles. Driving the car under load, it hesitates. Classic feel that you get when spark plugs start going bad. I installed new double platinum plugs, and got a replacement set of GM wires under warranty, and put everything in, it was looking great. Unfortunately, I didn't fix anything.
I can easily reproduce it doing 20mph up a steep hill near my house. Going pretty slow up the hill, low rpms, the engine feels like it misses a few times. As soon as you give it some gas it just takes off and all's well. The next thing I would think to check are the coil packs, but I din't have a simple way of checking those, other than buying one & swapping them around. And as I read in a similar thread, I suppose a fuel injector could be at fault. Someone recommend me a game plan. -Dave FOR THE SOLUTION TO THIS DILEMMA, SEE POST 31 OF THIS THREAD
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000 Last edited by guitarfish; 01-27-2010 at 10:57 PM. 
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#2
08-15-2009, 12:26 AM
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Re: I have a miss I can't figure out
Is everything on this engine stock?
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  2000 Pontiac Grand Prix GTP 3.8L SII V6 S/C 2000 Jeep Grand Cherokee Limited 4.7L V8 ---------------------------------------------------- 1996 Chevrolet Camaro Z28 5.7L V8 1993 Chevrolet Suburban K1500 5.7L V8 1991 Ford Probe LX 3.0 V6 1986 Ford Tempo GL 2.3L 4 cyl.
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#3
08-15-2009, 08:27 AM
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Re: I have a miss I can't figure out
Quote:
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#4
08-15-2009, 11:05 AM
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Re: I have a miss I can't figure out
Dave, Obviously the issue here is the fact that you used this car more heavily while your 08 was in the shop due the subframe and thats what caused your problem. Bring it to the body shop and tell them its their fault and make them fix it! (sorry couldn't resist, I'll stop now!)
First, unplug all the ignition wires at the coil packs and have an aissistant crank the motor over for a few seconds. You should observe sparks jumping across the two consecutive towers on each coil pack. If one coil cannot make the spark jump across, swap them around and see if your issue is with the coil itelf of the ignition module. My next plan of attack would be to remove the ICM and bring it in to oreilley's for testing. If it tests good, Have them do it again to get it nice and hot. I have seen beginning stages of ICM failure where the car will start and idle just fine, but as soon as you give it gas, it stubled and died. Let us know what you find out!
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-2000 Grand Prix GTP 170,000mi (daily driver) -2000 Olds Alero 100,000mi (soon to be DD with gas at $3.45/gal) -1997 Chev K1500 4x4 115,000mi (Natalie's truck [nans_grandprix]) AF "2.0" Community Guidelines Conservative Victory 2012!!! "I'll Keep my Guns, Freedom, and Money. You can Keep the Change!" ----->>>>> Did You Know? <<<<<-----
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#5
08-15-2009, 03:17 PM
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Re: I have a miss I can't figure out
Quote:
 
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#6
08-16-2009, 02:22 AM
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Re: I have a miss I can't figure out
Sorry!
Any luck on the coil packs?
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-2000 Grand Prix GTP 170,000mi (daily driver) -2000 Olds Alero 100,000mi (soon to be DD with gas at $3.45/gal) -1997 Chev K1500 4x4 115,000mi (Natalie's truck [nans_grandprix]) AF "2.0" Community Guidelines Conservative Victory 2012!!! "I'll Keep my Guns, Freedom, and Money. You can Keep the Change!" ----->>>>> Did You Know? <<<<<-----
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#7
08-16-2009, 10:20 AM
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Re: I have a miss I can't figure out
I won't get a chance to mess with it for a couple days, but I'll post back.
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#8
08-18-2009, 09:45 AM
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Re: I have a miss I can't figure out
Since it's a miss under load on an '02, have the converter checked as they are a known issue on 01-02 GP's and GM has an extended warranty on them due to this issue. If the cat has already been changed, then we need to start looking elsewhere.
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 Still waiting for the "good old days" I'll get to bore my future grandchildren with!
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#9
08-24-2009, 05:48 PM
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Re: I have a miss I can't figure out
Well I pulled the plug wires off tonight and did the coil pack test. Having never done this before, I put black electrical tape on coil tips for 2 of the packs at a time and had someone crank the engine. The tape didn't matter, I could see spark jumping across the tips according to firing order.
My next step will probably be my friendly neighborhood repair tech. It's my wife's car, I need to get it fixed, and I don't have the ability to test fuel injectors, etc. Thanks for all the help fellas. I'll let you all know what it ends up being.
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#10
08-31-2009, 04:44 PM
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Re: I have a miss I can't figure out
Quote:
__________________
Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#11
09-01-2009, 02:48 PM
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Re: I have a miss I can't figure out
The car is fixed. I'm not going to say what it is, you're gonna have to guess. In addition to my initial post, I'll add that when climbing hills even at high speed, 60mph for example, the car kinda lunges forward, falls back, repeatedly.
I dropped it off at my trusted local shop, they had it diagnosed & fixed in under an hour. OK, GO!
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#12
09-01-2009, 03:06 PM
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Re: I have a miss I can't figure out
They found that you like to text while driving!
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2000 Pontiac Grand Prix GTP 3.8L SII V6 S/C 2000 Jeep Grand Cherokee Limited 4.7L V8 ---------------------------------------------------- 1996 Chevrolet Camaro Z28 5.7L V8 1993 Chevrolet Suburban K1500 5.7L V8 1991 Ford Probe LX 3.0 V6 1986 Ford Tempo GL 2.3L 4 cyl.
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#13
09-01-2009, 03:20 PM
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Re: I have a miss I can't figure out
That was pretty funny. NO SOUP FOR YOU!
C'mon guys...
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Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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#14
09-01-2009, 03:32 PM
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Re: I have a miss I can't figure out
How much was the repair bill?
__________________
2000 Pontiac Grand Prix GTP 3.8L SII V6 S/C 2000 Jeep Grand Cherokee Limited 4.7L V8 ---------------------------------------------------- 1996 Chevrolet Camaro Z28 5.7L V8 1993 Chevrolet Suburban K1500 5.7L V8 1991 Ford Probe LX 3.0 V6 1986 Ford Tempo GL 2.3L 4 cyl.
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#15
09-01-2009, 03:36 PM
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Re: I have a miss I can't figure out
Quote:
__________________
Current Grand Prix 2008 GP - 174,000 Former Grand Prix's 1994 GP SE - 231,000 1997 GP GT - 134,000 1998 GP GT - 225,000 2002 GP GT - 222,000
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