So I went to scan my 95 z28 and the plug is the OBD2 style. I used the OBD2 adapter and it wont read the car. The 95 plug wont fit. ANy suggestions? thanks
Trev

 

It's an obd2 style connector with an obd1 pcm....make sure whatever you're scanning with is obd1 compatible. What are you using to scan, a scan tool or computer software?

 

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

i assume ur using an obd1 scanner cuz u said ur using an obd2 adapter, so that diagram shows how to connect it

 

Wow! Awesome, and it worked. So it came up with the following : 29, 48 and 84. One was maf flow problem, one was 3 to 2nd gear downshift and one was an electrical fault. Off to research. . .
Thanks for the help

 

DTC 29 is usually a blown fuse for the AIR pump. If you replace the fuse and it continues to blow, thepump is probably siezing up from corrosion. Pull the harness connector off the AIR pump, then replace the fuse. The pump won't work, but it will get rid of the code and SES light.

DTC 48 can either be a faulty harness or a faulty MAF sensor. With key on/engine off, check the voltage between the pink and black/white wires in the harness connector. Should get 12V. If you have 12V, its a faulty sensor.

DTC 84 is for the 3 to 2 downshift solenoid only if your car has an automatic trans. If you have the manual trans, DTC 84 indicates the skip shift solenoid has been disconnected, or if its still connected, check the fuse.

You need to add a "Signature" with basic info about your car - year, model, engine, trans and any major mods. That way people have most of the info they need to help you.

 

Thanks for the info man! Signature updated.

 

ny eh? queens here! don't see too many lt1's runnin aroundd

 

I wonder if the big rip in the intake boot has anything to do with the Mass Air code? LOL
Anyone know where I can get one. I had about 3 laying around from the various caprice and impalas that I have had, but cant find any.

 

Yea that rip would have something to do with it since there is that unmetered air going into the engine which the MAF can't compensate for. I would go for an aluminum elbow that's what I did after mine ripped.

 

The OBD-I code for the MAF sensor is based only on the electrical circuit being complete or not complete. Only OBD-II has codes for rationality of the MAF sensor reading.

The tear in the inlet elbow is probably causing it to run worse than it should though. Why would you drive it like that?

 

I drove the car less than ten miles from where I bought it. I am trying to handle all of the issues before I put it on the road. thanks

 

I easily repaired my boot with black rtv and some patience. I used a plastic bag to keep the rtv from sticking where it shouldn't until the rtv setup, usually 18-24 hours. The screw clamp band hides most of the work and it looks fine.