Thread: Any EFI masters out there?

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I have a Street & Permformance Tunnel Ram EFI unit on an LT1 383 Chevrolet. The chip which S&P originally burned (as well as the following 5 adjustments) have resulted in a very rich operation.

After trying several times to get this resolved, I have taken matters into my own hands. I just bought a "AutoProm" from Craig Moates http://www.moates.net
and he has been very helpful explaining how to set up the real-time monitoring and chip burning.

The reason I am seeking some expert advice, is I now need to know what to look for. Again, I now have access to the data, but am too new at this to know if the information I am seeing is good...bad...or indifferent.

If you know where I can get started, I would appreciate any help you can offer. I simply dont want to lean this out too much and melt the engine.

Thanks in advance,

Troy

Troy,

The expert I went to for my LS1 is John Spear at Speartech(http://www.speartech.com/). He is one of the most helpful people I have ever worked with and his knowledge has been spot on every time. His Web site says he does LT1 stuff too. Might be worth a phone call or email.

Pat

Thanks Stu Cool for the response. But I am hoping someone out there knows enough about this to get me started. If I only call the guys who charge $350-$400 per burn, I run the risk of only adding to the already very expensive tab I have invested. Again, this is why I spent the $400 to purchase my own analyzer and chip burner.

I did check out your link on your Studebaker. And it is quite the deal! My compliments on such a blastin rod!

If anyone else knows about the LTI TPI EPROM programming world, please dont hesitate to give me advice. I am new at this but as with everything else with Hot Rods, I have no doubt with some help...I will learn my way!

Thanks again,

Troy

What ecm are you using?

I have the 1227730 ECM.

Thanks,

Troy

Once you get the autoprom work log some data based block learn and itegrator (long and short term fuel control) 128 is perfect so you some where
around 122 to 134 on your block learn reading. In your data is it going closed loop where the o2 sensor crosses over stoich or high to low. What o2 sensor are you using, is it heated or not.Are using Tunerpro for your edit software.
What kind of vaccum do have at idle.
If you want send me some data and I can get you to a starting point.
Terry
rosesandwrenches.com

Thanks DennyW for the links. I am learning from them, but this is a slow process for me.

tl34ru...you sound like you have done this a few times. I truly appreciate your expertise. I will check the vacumm tonight and let you know what it is. I just replaced the cam and haven't re-checked it since.

Craig Moates suggested I adjust the Injector Flow Rate from 22 to 28 and now the BLM is reading 108. Since it is 108 and everything I have read says I should want 128, does this mean I am running too rich?

Yes I am using AutoProm and I can send you a file I recorded today after the IFR was adjusted if you like.

Thanks again to both of you for all your help!

Yes it is running rich, is this at idle, if so then need you to need to lower that
point in the ve table.
Terry