WOT Lean condition .dat files attached

[don86T]

Hi,
I made a couple passes today and the car continues to runs lean at wot. I had to lift before the 8th with EGTs at 1725 and climbing. I've been dealing with this lean condtion for a while now. I've replaced the pump and have installed a gen II translator and a TT 5.7 chip do to the stock Maf failing. I plan to go with an extreme G chip but would like to get a couple clean runs first on a plug and play chip first.

Thanks for any help.
Don

 

[TurboBuRick]

What fuel? Running alky?

Have you tried adding fuel with the chip? Have you tried turning boost down?

Could really use a wideband and a G chip to take full advantage of the Gen2.

 

[don86T]

Fuel is a 50 50 mix of 93 and 110. Yes, also using a progressive alky kit. In th past I had been using that combo at up to 26 lb of boost with a fairly high timing race chip. I did try lowering the boost and added about 6% fuel at WOT. The alky cause some stumble at lower rpm but still leaned out at about 5,000 rpm at lower boost levels.

 

[Eric Stage I]

How old is the alky pump?

Was the chip made for your setup? If you have the chip# I can look it up.

 

[don86T]

Fuel is a 50 50 mix of 93 and 110. Yes, also using a progressive alky kit. In th past I had been using that combo at up to 26 lb of boost with a fairly high timing race chip. I did try lowering the boost and added about 6% fuel at WOT. The alky cause some stumble at lower rpm but still leaned out at about 5,000 rpm at lower boost levels.

 

[don86T]

The pump is about six years old (Sure flow pump). the chip was new in April, order number 11526. I hadn't thought about the alky pump getting weak, I'll get a tee for the line and hook up a gauge or get another sender for PL to record.

Thank you

 

[Eric Stage I]

Most of my alcohol chip programs assume a certain amount of alcohol will be spraying. Since 90% of guys use the Alkycontrol kit, I use that as the baseline. It will be lean if the alky amount is less than expected. In general, with these alky pumps, anything after 2 years, and they should be looked at.