noisy lifters.

[Fox Slaughter]

So any idea why my car would just flat out die when the MAF is unplugged?

If your tune was never messed with , sensors related to speed density.
Engine Coolant Temp, intake air temp, ect.

[hoogiesngrinderz]

Try starting it with it unplugged. If it doesn't fire, there is a sensor telling the PCM some bad info. TJ laid it out:

If your tune was never messed with , sensors related to speed density.
Engine Coolant Temp, intake air temp, ect.

Speed Density requires RPM, CTS, IAT, MAP, and TPS.

Car is running. That means the PCM is getting RPM signal.

Coolant Temp sensor will swing the fuel the most out of any other sensor. They typically short out (PCM thinks the engine is cold all the time) or become and open circuit (PCM thinks the engine is warm all the time). From my experience, in normal +60° weather, the engine will start with an open CTS and continue to run all day. It will usually start hard in the winter weather though. On the other hand, a shorted CTS will start when cold then run terribly with a warm engine - and fail to restart when warm.

Intake air temp sensor has a more minimal affect on fueling. This shouldn't cause and engine to shut off or cause a no start to start if the sensors fails.

Manifold absolute pressure sensor is mainly used to calculate load on the engine. It can and will cause odd fueling issues, but in my experience the issues present themselves and RPMs above idle.

The throttle position sensor will mess with the idle if it is adjusted too high, .7v or more usually.


There is more to it all, but that is a simple run down of issues I've encountered.

[nascarnate326]

Has your car been tuned at all?

[Steves94Z28]

Has your car been tuned at all?

As far as i know, it has never been tuned. it is a 94 camaro that came with the v6 but it was swapped out for a 95 lt1 that was supposedly just rebuilt when i got the car.

[zeeman]

well I did a compression test on it today (for the record, that sucked), all cylinders are 140 -145. so its not the rocker arm adjustment. Plugs look rich to me but I didnt do more than let it idle last time it ran. I am going to test the plug wires for resistance next.

[zeeman]

Ok.I've had enough. The car still shakes, its better but still not right. I spoke to my hookup at Advanced. Ill get full credit on the Rich Porter towards an MSD optispark. $500.00 but at least Ill have confidence in it.
So Sunday Ill be pulling the water pump and opti.....again.....

[nascarnate326]

Sorry to hear. Don't get discouraged like me and get a ls1....or should you..

[popo8]

Sorry to hear. Don't get discouraged like me and get a ls1....or should you..

ur goin LS?

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[nascarnate326]

ur goin LS?

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lol I did last year.

[popo8]

Really?

LTXtech.com is my DRUG!

[zeeman]

Sorry to hear. Don't get discouraged like me and get a ls1....or should you..

Damnit! Stop reading my thoughts!
I'd ove to but It'll have wait till later.

[nascarnate326]

As crazy as it sounds "is all in your head" was exactly my problem.

See if you can get a different set of eyes/ears on it.

[zeeman]

I did, I've had several people look at it, everyone says, "yeah, that ain't right". Like I said before, it ran fine with the ebay opti Nick put in it, until it died. No shaking, smooth to about 6k rpms. So Ill throw a new quality opti at It.

[SOPES]

And a new water pump while doing the surgery ??

[nascarnate326]

I had great luck with a chandler opti. Recently sold it to Brian as a backup. Hopefully a opti will get you back on the road cruising.