95z28 hey guys my car turns on when the maf sersor is disconnected, when i connect the sensor the car starts but then it turns off, i went to thelocal junk yardand i found three maf sensorsand i bought them all ,none of them work i dont think is a quincidance but i will try a new one in case is not the maf sensor what else can it be.

 

it might the plugs try replacing those also, o and just because they look the same even iff all the numbers are the same doesnt meant that they are the same so get one exactly from your year and engine

 

Unplugging the MAF is just going to force the car to run in open loop mode, it could be a different sensor. I doubt it's the plugs because it sounds like the issue only occurs when the car is running in closed loop mode. Do you have an SES light on?

 

agreed. plugs wont be the issue if the car runs in SD. im sure you have a code, but the 95 is OBD1 correct?

 

The 95 is an OBDI car with an OBDII diagnostic port, so you can't read any codes with a regular code reader like they have at autozone etc. You have to get the codes read from a dealer or jimmy it around (see LT1 sticky...)

 

thats correct silver i have the check engine light, the plugs are new, all the sensors are connected and the vacuum hoses, i ran out of choices here. also about reading codes how can i make the chech engine light to start blinking and get the code someone told me about this but im not really sure how to do it.

 

have u checked to see if your egr valve pintle is stuck

 

When you disconnect the MAF the engine runs in open loop, and the PCM ignores many of the sensors. This is an indication that a sensor is bad, and not necessarily the MAF. You need to get the engine scanned & find out the DTC, otherwise you will be throwing parts at the car and acoomplish nothing.

 

thanks for the advice i still havent found the problem o2s are connected but the left side exhust is hangin still not connected but i dont think thats the problem..i try to scan the engine but it failed it couldnt read any codes like one of you guys said is an obI with and obII port and i still havent found an adapter for the scanner none of thelocal autoparts have an adapter for it.

 

Like I said before, check out the sticky at the top of the LT1 section and there's a section with a few links about reading the OBDI codes from the OBDII port.