I have a 1995 Z28 automatic, when im driving the car stumbles and the check engine light comes on..then turns off after a few seconds and i continue to drive then after a while the stumbling process repeats. I recently was in an accident and had to replace my MAF connector and splice the wiring because the old one had the wiring cut near the connector. Im thinking the wiring is not tightly connected or maybe the connector i got from the junkyard is bad. Also im not running any intake tubes just straight MAF on the throttle body because of lack of room, and the vacuum hose that connects to the intake tube is not hooked up to anything, could this be the problem? the car has turned off on me when the rpm starts becoming really low and goes to 0.the car did not stumble before the accident? any suggestions?

 

Have you scanned it for codes? Would seem like the first logical step, since the stumble correlates directly to the SES light coming on. The code should tell you exactly what the problem is.

The only thing that would connect to the rubber elbow between the MAF sensor and the throttle body would be the air supply line for the Opti vent system. It's not a vacuum line. If its not connected, you will be pulling unfiltered air through the Opti, which isn't doing it any good, but at this point won't affect the way the engine runs.

 

thanks for responding, no i haven't scanned it yet because the auto parts stores where i live only do 1996 and up vehicles and i dont know anyone with an obd 1 scanner. would the codes still show up if the SES light is not permanently on, but just comes on and off when it wants to?
any ideas on how to check my SES?

 

The codes are stored, and can be retrieved with an OBD-I scanner (not the type that simply shorts the pins and flashes the codes on the SES light). SES light does not have to be on. Or you can get free scanning software, a cable, and scan for codes and monitor many sensors and PCM parameters in real time. The codes will "self-clear" after a specific number of "drive cycles" have accured without the problem returning.

http://www.ttspowersystems.com/DataMaster.html

http://andywhittaker.com/ECU/FreeSca...0/Default.aspx

http://www.akmcables.com/

Your 95 has a minor problem as far as scanning. Although it has basically the same OBD-I PCM as the 94's, it has a 16-pin OBD-II style ALDL connector. You need a laptop cable with the correct 16-pin end, or a scanner with the adapter to adapt the 12-pin OBD-I connector to your 95's 16-pin connector. Or, use Shoebox's "jumper" method:

http://shbox.com/1/xraycable.jpg