Troublesome CEL Light

[jpacetti]

I have a 95 XLT with a Check Engine Light that comes on and goes off when it wants to. I tried hooking up up my code reader to the OBDII connector which gets power and shows its connected. But when I try to download any codes it just gives me an interface error and tells me to make sure the car is switched to on. I have the same problem if I try to clear the code.

My next thing I will do is to ring out the wiring between the ECM and the reader connector. It has been like this ever since I changed out a fuel injector. But the light remains intermittant and it runs great.

Has anyone had a similar problem with their ECM? Or any other ideas about what to check? Btw I did go back and recheck my injector installation and all the connectors I could shoot some electrical cleaner through.

 

[ErnieX]

Aren't 95's OBD1? My old 95X had the OBDII connector inside but it was only part of the transistion to OBDII and the connector was basically a dummy. The codes had to be read from the OBD1 connector under the hood on the driver's side fender next to the master cylinder.

Hope this helps

EE

 

[Cobraguy]

Ernie, you are exactly right. You can't pull codes from the ALDL connector. That's not what it's there for. You need to connect to the connector on the driver's fenderwell. It's a trapezoid looking affair with a separate wire for the fuel pump relay. Your OBDII reader will not work.

 

[jpacetti]

Thanks for all your help. I never knew where the OBDII jack was. I figured due to the other connector I had OBDII. I never would have found it due to the fact it was covered. Well I pulled codes 377 and 376 both for the EGR. Going to get a new solenoid tommorow. Glad I found this forrum.