Here's what the dealer "invoice" says:
Heard no engine nooise, engine and valvetrain are quiet. 8 DTC's. 6 O2 DTCs as rear sensors are missing. P0300 and P1482. Diagnosed P1482 and found that customer had spliced into cooling fan signal wire from ECM. Reconnected wire and still cannot command fan. ECM may have been damaged due to splicing. Vehicle is equipped with full length headers without catalytic converters, aftermarket exhaust system, cold air induction system w/ relocated IAT. Modified transmission with 3200 RPM stall converter. Test drove vehicle with customer and took snapshot of IGN data showing knock at hard accel. found tha tpassenger side header and Y-pipe are contacting the frame. Provided clearance for header per customer direction and took another snapshot. no knock detected, but still breaks up at high RPM. Customer has NGK plugs installed. Replaced plugs and wires. Performed static and running compressoin checks as well as cylinder leakdown with all values good. Removed valve cover and checked springs, rockers, and pushrods: GOOD. Checked fuel pressure and vacuum at WOT: GOOD. No fluctuation in vacuum gauge . Removed fuel rail to check for contaminants / debris : good. Checked injector pulse to injectors: GOOD. Took fuel sample and checked ethanol content: 10.4% - GOOD.
NOTE = 195 psi static compression
90-93 psi running compression
2-3% leakdown.
SVC manager spoke with GM(general manager) and we respectfully decline to continue any further diagnosis and/or repairs on this vehicle. Customer is not being charged for any services, vehicle put back to same condition as when it arrived.
I never told them about the trans/converter, they must have gathered that intel from this forum.
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