DIY PROMDo It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
I'm looking for any suggestions on fuel and spark timing near idle.
For a little back ground the engine I have came from a 87 suburban, it is a TBI 5.7, it is stock as far as I now, but I also know the heads have been removed before. I am running 2.5 in true dual exhaust with shorty headers.
I am using a 16144288 ECU with the A0 mask and an Ostrich 2.0 emulator. I have been playing with it longer than I care to admit, but have re-inforced the leson of ensuring it runs properly before you try to tune.
I have made a lot of progress, but it still idles rough and smells rich near idle. I have tried to lean it out, but the idle gets worse. I am concerned that I am adjusting the fuel to make up for a lack of timing.
Fuel tables look like this:
Spark tables look like this: (main spark bias is set to 10 degrees)
Looking for any input on the fuel and spark. I really don't have a clue what these are supposed to look like other than I have tried to make the BLM values reasonably close to 128
This ad is not displayed to registered members. Register your free account today and become a member on ThirdGen!
Sponsored Links
Registered users do not see this ad. Click here to register for free!
