Looking to buy some used shorty headers, and just wondering if a set off of a 94 fit my 93 lt1?

-Max

 

Should work with no problems since both years are OBDI cars and have single cats.

 

AIR/EGR fittings are different from 93 to 94.

 

93 was a chip i thought
94-95 OBD1
96+ OBD2

 

They are both, chip and OBDI cars.

 

Incorrect, yes they are both OBDI granted, but 93 is only the chip car. 93 is an ECM, the comp controls the engine and thats it. 94 is PCM, Comp controls engine and auto trans, thus the 4L60E. 1994 The Chip is sodered so the entire PCM has to be reprogramed.

 

Thats exactly what I said. They are both. Meaning they are OBDI cars and have a chip.

 

my main concern is the egr and air things, must they be hooked up? or what is the deal wiht them?

93's are Chip cars, have to reprogram the chip, and yes, ODB1

 

Taken directly from my 93 specifics list (listed in my sig) -


Headers/manifolds are different. EGR gasses are only taken from right above #8 cylinder. The tube above #1 is for air injection. (94+ have an extra hole on the passenger side for a 2nd A.I.R. input.)

 

I have '94-'95 headers on my '93.
If you get a plate to block off the AIR it they will bolt up fine.

 

I actually just went through this about 2 weeks ago. I got 94 JBA headers to go on my 93. I got a plug to fit in the AIR on the driver side headers. On the passanger side, it was plugged up. The Y pipe fits fine. I had almost no problems putting them in and since then, I have had absolutely no problems with driving other that it throwing SES at me all the time.


John

 

So essentually, just need to get a blockoff plate for one of the holes? any place where to get and cost?

 

I should have been more specific. Yes you can use them, but they are slightly different. All you will need is a plug for the extra hole on the passenger side or add another plug and a block-off plate to that and delete those inputs all together.

 

Check you AIR pump fuse. After doing Headers, !AIR, and !EGR They always seems to blow the fuse which causes the SES light to trip