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01-04-2021, 04:07 PM | #40 |
Registered User
Join Date: Aug 2012
Location: vista,CA
Posts: 46
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Re: 75 GMC sierra classic face lift and conversion to short bed
Despite having the DBC chip in blue green ECM, its was not easy to convert from DBW
the harness repair had its own challenges because we had to change the TPS and IAC and their socket changed respectively. I made mistake and bought those chines 90MM throttle body with spacer to 85mm after repaid the wire completely I tried to start the engine, I was able to turn it on and keep it on idle smooth the only issue here was insanely loud whistling from TB but the main issue is the engine wont rev at all and drops the power I noticed the TB does not send any signal to the ECM double checked the TPS and wiring again, no issue I replaced the TB with factory Corvette LS1 TB, no result fuel pressure is good Injector needles are clean and tested under pressure; works great tried with airflow meter and without, but same MAF and MAP sensors are placed in their own slots have new spark plugs not sure why ECM does not read from TPS PLEASE FEEL FREE TO HELP here is the video : LS1 Whistling here is the parameters reading: Last edited by sam in vista; 01-04-2021 at 04:32 PM. |
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