LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Codes and Exhaust

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Old 03-21-2011, 09:40 AM
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Default Codes and Exhaust

Alright i have googled for literally days. If I was to put RACE headers on my car (95 lt1 6 speed) With a true dual set up. Will it throw a code? If so will it hurt how the car performs?

Im sorry if this subject has been beat to death with a bat wrapped in barbed wire, just cant find it.
Old 03-21-2011, 09:49 AM
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Ideally, you'd want to tune out the EGR since you'd be disabling part of what it does. You could do that yourself with an aldl cable and software available at aldlcable.com. You'd need this one; it accomodates the OBDI PCM with a OBDII connector:

http://www.obd2allinone.com/sc/detai...?item=aldlobd2

I'm essentially doing a stock rebuild + bolt-ons project right now and I opted for a mail order tune to maximize the benefits of headers, true duals, tweak the trans performance, etc. However, it's good to gain the experience of self-tuning although that should be approached with caution and lots of research beforehand. The temptation to overreach may be irresistable.

The AIR does not necessarily need to be tuned out as long as the fuse for it is left in place in the fusebox on the driver's fender block under the hood.

Last edited by Gojira94; 03-21-2011 at 09:55 AM.
Old 03-21-2011, 09:54 AM
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i got rid of egr and air pump and put headers on mine and have 0 codes. you need to run 02s and i would probably get a tune to tune out the egr and air. i have only noticed it runs a little richer but not retarted. good luck! and dont buy ebay headers!!
Old 03-21-2011, 10:12 AM
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Well since I want to go full bolt ons too, what would be better tune it myself or go with a mail order tune later down the line when a few extras have been added?
Old 03-21-2011, 10:16 AM
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There are quite a few people running the ebay headers for how cheap they are who cares if it takes some creativity to get them in
Old 03-21-2011, 10:45 AM
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Originally Posted by Dustyv8
Well since I want to go full bolt ons too, what would be better tune it myself or go with a mail order tune later down the line when a few extras have been added?
I'm dealing with PCMFORLESS, and they allow you to tweak your tune for moderate changes for $75.00 after an initial mail order tune cost of $175.00. Bryan & Kevin are very good at these cars and have tuned just about any combo you can think of over the years. As close to perfect as you can get without going to the dyno, according to a few members here. That's why I went with them. If you wanted to do the emissions deletes yourself now, you'd be in for an initial cost of about $110.00 between the cable, shipping and decent low cost software.
Old 03-21-2011, 11:00 AM
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That way seems a bit more bang for your buck. That way at least I know the tune will be alot more efficient then what I can do.
Old 03-21-2011, 11:04 AM
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Solomon had my bolt on car trapping 107 with no RRs or EWP might want to look at hom also and 50 bucks cheaper with 2 free retunes




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