I did a 3.4 swap into my '88 Formula knowing it would need a revamped chip. After a bit of break-in I really need to update that chip. I know there is a Pennock's guy who does them but I have lost the info I need to contact him. Can anyone help me? Thanks.

I am fairly certain that you are looking for Darth Fiero of Sinister Performance

If you're going to get a reprogrammed chip, Darth would be the one, but you don't necessarily need it. Why do you feel you do? I'm running a 3.4 in mine on a stock ECM, and I personally know of 3 others doing the same. The only thing you would need do is replace the Fiero injectors or the original 3.4 injectors with a pintle or modified pintle style injector rated at 17#.

http://www.gafiero.org/bbs/...20.msg17004#msg17004

quote Originally posted by fierofool: If you're going to get a reprogrammed chip, Darth would be the one, but you don't necessarily need it. Why do you feel you do? I'm running a 3.4 in mine on a stock ECM, and I personally know of 3 others doing the same. The only thing you would need do is replace the Fiero injectors or the original 3.4 injectors with a pintle or modified pintle style injector rated at 17#. http://www.gafiero.org/bbs/...20.msg17004#msg17004

The stock fiero ECM will run a 3.4L . For optimum results though, I recommend that the base Pulsewidth Constant be adjusted in the program as well as the fueling above 3000 rpm. Depending on the plenum you use the fueling needs will change. The Fiero plenum really chokes this engine of air at the top end. You can adjust for it but porting the plenum and adjusting the program yields better results.

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Thanks for the help. Darth Fiero was the member I had in mind. I installed the 17 lb. injectors with the rebuild; it has a mild cam and headers with the Borla exhaust. I think it needs the reprogrammed chip because upon first start-up of the day it will not idle and I have to keep the engine running at 2,700 rpm for about a minute. After that it will cough and hesitate for another minute or two of running. Then it idles and runs OK but certainly doesn't have the power it should considering the modifications. Once it has been started, it will restart easily the remainder of the day. Because of that I haven't considered a vacuum leak. I'm now hoping that the reprogrammed chip will help me. Thanks again, those of you who responded.