Have several DTC's looking for some input on as to why. Runing dhp on ecu 16227797 3.4 dohc turbo
P0103- Maf circuit high frequency
P0112- iat sensor circuit low frequency
P0113- iat sensor circuit high frequency
P0117- Ect sensor circuit low frequency
P0118- Ect sensor circuit high frequency
P0122- Tps sensor circuit low frequency
P0125- Ect insufficient for closed loop fuel control
P0218- Transmission Fluid over Temperature
P0325- Pcm knock sensor circuit
P0506- Idle speed low
P0507- Idle speed high
P0602- control module not programmed
P0705- Trans range switch circuit
p0716- input speed sensor circuit intermittent
P0717- input speed sensor circuit low input
P0719- brake switch circuit low input
P0724- brake switch circuit high input
P0730- incorrect gear ratio
P1200- injector control circuit

quote Originally posted by 3.1 88FieroGT: Have several DTC's looking for some input on as to why. Runing dhp on ecu 16227797 3.4 dohc turbo P0103- Maf circuit high frequency P0112- iat sensor circuit low frequency P0113- iat sensor circuit high frequency P0117- Ect sensor circuit low frequency P0118- Ect sensor circuit high frequency P0122- Tps sensor circuit low frequency P0125- Ect insufficient for closed loop fuel control P0218- Transmission Fluid over Temperature P0325- Pcm knock sensor circuit P0506- Idle speed low P0507- Idle speed high P0602- control module not programmed P0705- Trans range switch circuit p0716- input speed sensor circuit intermittent P0717- input speed sensor circuit low input P0719- brake switch circuit low input P0724- brake switch circuit high input P0730- incorrect gear ratio P1200- injector control circuit

some of the codes you may need to turn off, but with as many sensor related codes are shown, I would suspect your missing a ground somewhere in the wiring. What transmission are you running?

The 97 Monte 4t65-e

does the engine run right now? or are you just doing a test before you try and run it?

I cannot see this many DTC's showing up without a serious error somewhere. The PCM is reporting that many sensor readings are askew. Would tend to agree with ericjon that you have a ground problem but did you get these codes after the engine was fired up? If you are testing before running the engine the PCM may not monitor dynamic conditions.

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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
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yeah car runs and drives pretty good havent gone over 25% throttle yet. turns out removing battery cables wouldnt clear my codes i had to do it with a scanner. after i clear them and run the car they stay away. but they do come back every time i upload a tune to the ecu, and then have to clear them every time i upload a tune.

hmm, that's odd. are you running the 2002 bin file we talked about?

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No still undecided if I wanna try a newer ecu I'm using the stock 97 ecu