350 tpi prom. The 28 pin chip on board is essentially useless.
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350 tpi prom Custom programmed mem-cals are needed to defeat VATS, eliminate nuisance trouble codes, and correctly match engine modifications on non-stock engines. I have posted pages to help those with these systems overcome the limitations of those systems and point out what those limitations are. For 1985-1993 vehicles, we provide a custom-programmed PROM we send to you. The 90-92 350 TPI F-Body engines (Camaro and Firebird) used the 1227730 ECM, and so did the 90-92 305 TPI engines. Both the 305 and 350 were roller cam blocks Welcome to Harris Performance, this site dealing with the TPI Tune Port Injection system used by GM from 1985 through 1992. EXAMPLE: 1990-1992 TPI F-Bodies (305 and 350) require a ’27C256′ EPROM. Prom had a broadcast code is AUJM. I used the same chip in the computer but it would have worked better with the 350 prom. The 28 pin chip on board is essentially useless. fuel psessure regulator would also work to increase the fuel flow. 1994-Current vehicles use "Flash-Style" computers and you must send your computer to us for recalibration, but for the early chipped computers we just sen Dec 26, 2007 · I did the same swap on an 87 IROC, 305 TPI to a 350TPI. For EPROMs, I am using the following for my 1990 IROC 350: 28-pin, 256K CMOS EPROM (32K x 8), 90ns, CERDIP Jun 24, 2015 · Part # MC239 All TPI ECMs from 1990-92 require the correct Mem-cal to supply fuel and spark calibrations. This is a stock, used prom originally for 1989 350 TPI Camaros and Firebirds with an automatic transmission. I had to change the injectors in mine or it would run lean and overheat. We offer custom calibrations for 1985-1992 TPI, 1992-1997 LT1/4, and LS powered vehicles. See the table presented at the end of this tech article to determine the type of EPROM needed for your car. In other words, the 86-89 350 TPI engines used the 1227165 ECM, and so did the 86-89 305 TPI engines. I was told an adj. . 1990 and later Mem-cals also contain the electronic spark control (knock sensor control) eliminating the ESC module… Aug 29, 2010 · The difference between the engines was the prom. However, this prom had failed a reprogramming in the past, and will not program correctly. oef bokk euruo nnv bfvkz xdbly xgjicj eraokaeoo helx btrmeit