LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Engine light comes on then goes off-vac leak?

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Old 04-26-2010 | 10:14 PM
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Default Engine light comes on then goes off-vac leak?

As title states, my check engine light comes on when I am at anything more than idle, then goes out when it is just idleing at a light in gear. Had it scanned with a tech 2 when I worked at our local gm dealership bout 2 years ago. Only a couple of codes showed up with my map sensor reading low voltage, and my air pump non functional, it is seized up. l Also when it is cold and your going down the road it kinda surges when just coasting in 3rd or 4th gear, but seems to disappear when it get warm. i did notice that there seems to be a small amount of oil around the little plate that goes over the throttle body, and I do seem to have oil coming out the back of the intake dripping on the ground. Is it a possible that this is causing a pretty good vaccume leak. had a vaccume gauge on awhile ago seemed pretty steady around 19 or so, but does seem to shake more than I remember at idle in gear. The dealership seems to be the only place you can get the throttle body top gasket and they were very expensive, thought about just rtv sealant but one of the tech guys didnt recomend it, any thoughts?

Oh passenger side bank of injectors seem to be noisier (like louder ticking)than the driver side too. Got 152,000 on her.




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