Wow, its been a while since I've been here... been nearly 5 years since I've had an operational LT1

Well I decided to buy a new car(new to me)

1995 Camaro z28 m6 lt4 magna-flow exhaust
150k miles on it(police interceptor), but the motor is an lt4 out of a vet (68,000 miles)
any way, I've will be getting the car in my possession on thursday, and its throwing an egr code because its got the steel plate covering it, and the egr valve has been removed. Anyone know how I can clear the code without sending off for new software, and if that is my only option, perhaps some advice on cheapest alternatives?

 

also, anyone that can point me to a walk through on skip-shift delete, I would appreciate it (my first manual, my previous f-bodies were both autos)

 

The EGR code will have to be programmed out. Madtuner.com and others can do that for you or you can buy a cable and program (like Tunercat) to do your own programming with a laptop or PC.

Skip shift resistor.

 

ohh friendly face, I remember you well shoebox, been a long time gone...

Thank you for the information, I'm sure it wont be the last. As I am in germany and away from a common radio shack i'll probably have trouble finding those items, but thanks.

 

Can anyone confirm or deny whether a simple resistor can be used in the EGR circuit to make it so the code doesn't show up? I vaguely remember someone saying you can do this but I've never seen the specifics.

 

The computer monitors for changes in MAP when the EGR is fuctioning, so you cannot get away with a simple resistor for all EGR trouble codes.

 

Ah, didn't know that. I thought it was just checking the EGR circuit itself for voltage. Thanks for the info!

 

meissenation:
I've got a 95 and use a 560 ohm resistor in the plug to the EGR switch ... no codes thrown. (ISTR that the Corvettes with LT4 motors didn't have EGR hardware installed) Supposedly the resistor is hit or miss for OBDI cars but doesn't usually work under OBDII.

 

thats my problem, its a 95 with a corvette LT4(no EGR) in it, I dont know which computer it has though...

 

Thanks!

 

What people need to remember is that in OBD-I there are two different codes for EGR - one for the EGR vacuum solenoid (can be eliminated with a resistor), and another for no EGR flow (as measured by the MAP sensor response). The latter can not be eliminated with a resistor. Some people have eliminated it by using the EGR solenoid signal to activate a resistor in the MAP circuit, but I don't know the details.

However, the OBD-I diagnostic for EGR flow is not anywhere near as sensitive as the OBD-II diagnostic, and usually does not pick up the missing EGR valve/flow.

 

Since yours is a 95 you can use this:

http://www.bfranker.badz28.com/96SS/skipshift.htm

Free, and gets rid of the light altogether. Best way to do it on a 94-95 car.

 

awesome...

 

KISS - simply unplug the harness connector from the skip shift solenoid. You get a code, but it doesn't turn on the SES light (OBD-I only).

http://www.injuneer.com/images/photo...n/T56Conns.jpg

 

How can I be certain if my car is OBD-I or OBD-II?

I am under the impression that OBD-I would have been standard in my 95, but from what I was told from the guy I bought it from, all mechanical portions of the car are from a 96 vette, I neglected to ask if the wiring harness came with the LT4. But wouldnt a 96 vette have a OBD-II setup?

I was just going to buy the tunercat program and usb cable, but I dont know which one to buy.