bloodyslayer42

I just got a 95 z28. It was a project car when I bought it. The Guy had put a 6speed swap in it. He also did a cc306 cam. Its got ported heads and a ported intake all new arp head studs and bolts. The car also has Hooker long tube headers and flow master exhaust that will be changed out with a borla. When I got the car it would hardley run it would back fire and had no power. I replace the computer and wiring harness with one from a 95 six speed car. I then replaced the optispark with a OEM one and all new plugs and wires. I replaced the coil and icm the o2s and the coolant temp sensor. The car fired up and holds idle now. The problem is as soon as the car fires the cooling fans come on and it Burns way to rich. It is back firing between 1 and 2 thousand rpms under load. The car is stuck in a open loop and will not go into a closed loop. I am waiting for software and cables to get here so I can tune and data log. I could really use some input on this though.

gregrob

iTrader: (8)

See what codes it is throwing... also unplug MAF sensor and see if I changes

quik95lt1

iTrader: (7)

was the car tuned at all???

bloodyslayer42

No car has not been tuned. I will be tuning it tomorrow. I just ordered tunercat.

ahritchie

iTrader: (1)

Lol, don't run it anymore untuned...LT1 modding 101 stuff right here....cam and heads swap always requires tuning. Do you know what your doing as far as tuning goes or do you have someone helping you on this?

quik95lt1

iTrader: (7)

yea theres ur issue......heads and decent agressive cam and no tune......what did you expect to happen lol?

bloodyslayer42

I have some one helping me tune I just wanted to make sure that would make it run a open loop

bloodyslayer42

Anyone have advice on tuning. I am always willing to listen.

bloodyslayer42

Does anyone have a base tune I could work off of

ahritchie

iTrader: (1)

My advice: Leave the tuning to the professionals....either get a mail order or email tune from somebody who does it for a living or better yet; find a competent local dyno tuner who is familiar with LT1's....they will definitely pick up more HP than a mail order tune and more importantly can improve driveability and even gas mileage.

bloodyslayer42

I am going to do it myself. I am just asking if anyone has anything I can work with.

gregrob

iTrader: (8)

Professionals don't usually post their work for others to scavenge. Most of the files I've seen posted up are pretty ugly hack guesswork. I would start with a known STOCK calibration.

Search my recent posts in the last couple weeks. I spelled out the basics of a proper tuning method.

bloodyslayer42

Thanks man. I will check that out.

bloodyslayer42

Can you send me the link to your post.

gregrob

iTrader: (8)

In this thread https://ls1tech.com/forums/lt1-lt4-m...open-loop.html

quik95lt1

iTrader: (7)

thats a nice simple write up greg........

bloodyslayer42

Thanks that should help