A Miss - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-24-2007, 10:11 AM   #1
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Default A Miss

Okay guys, I really need your help on this one!! Ill try and explain the problem the best I can! My bonne has had a miss when I go from a stop! Now, If I go easy on it from a stop it will be fine! If I put the gas half way down to the floor, it misses. Once the car gets going its fine. Now the problem comes and goes. Its not a fuel problem because if I put it in drive with my foot on the brake and give it gas, it misses every time! Now I know its not a fuel problem because I can smell gas like crazy. I replaced the spark plugs, AC delco, I changed the wires 8 months ago (10000 km) with AC delco. I also got a used ignition module and three coil packs from the 96 Grand Prix GTP from the wreckers, still didnt change anything. I have no clue where to go next! Anyone had a simular problem like this????
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Old 10-24-2007, 11:48 AM   #2
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Well, you haven't really convinced me that it'* not a fuel problem, or for that matter, that it isn't a spark problem, but before you go there, get the cheap and easy stuff out of the way.

First, have you checked every vacuum line and vacuum connector under the hood, including those going to the evap cannister?

Have you checked your PCV valve?
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Old 10-24-2007, 12:05 PM   #3
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oKAY, taking everything apart I noticed something wierd. The wiring harness going to the ignition module has 7 wires on the right side, and only 6 wires on the left going into the harness that goes to the ICM. Now, the ICE male ends have 7 and 7, 14 total. The female ends on the harness only have 7 and six, but it looks like one is missing! Does anyone know if it came like that?? Or could this be the problem im looking for!?!?

I have pixs on my computer, I just dont know how to post them!!!

[img][/img]
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Old 10-24-2007, 12:05 PM   #4
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Missing under load or up a hill is usually ignition related like a bad wire or intermitten bad plug. As lash stated don't rule out fuel problems also. If you are smelling gas, pull the vac hose off the regulator and see if thats where its coming from.
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Old 10-24-2007, 12:09 PM   #5
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sorry, stupid question, where is the regulator!! If someone is online right now, id like it if I could email you these pics just to get a second opinion!!
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Old 10-24-2007, 12:15 PM   #6
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Well, you could email the pics to me, but you would get better help and response if you post them here. It'* not hard, here'* how:

Picture Posting - Step by Step Guidlines(updated 5-1-07)
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Old 10-26-2007, 04:29 PM   #7
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The regulator is a round unit that is attached to the fuel rail on top of the motor.
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