SSR Pit Crew
Join Date: Oct 2003
Location: Summerland, B.C.
Silver on Black TVS2300 supercharged FPR 6 speed 4:10 #23387
1 - Pulleys and belts installed
2 - Fuel pressure sender installed on rear fuel crossover.
3 - Fuel pressure gauge installed
4 - Closer to completion
The remote bleeder sure made it easy to get the clutch system filled with fluid and purged of air.
First firing up the engine is a very nervous moment. It fired up, ran smoothly, oil pressure came up quickly, no engine light.
Ran it a few minutes with the coolant cap off, topped the system off, then checked for coolant leaks - all good.
Closed the cap, ran it till it reached operating temperature. Damn - slight coolant dribble. Found one heater hose that might not have been clamped tightly enough.
Ran it to operating temperature again, and all looks good. Truck is still on jackstands, so used the opportunity to test the clutch. Seems to operate smoothly.
Hooked up the laptop to check all functions, and found a problem with the mass airflow sensor not showing on the laptop. Traced the wiring from the maf sensor to one of the ECM harnesses. Wiring is fine.
No DTCs so far, so fair to assume MAF signal is getting to the ECM. Disconnected the MAF harness, restarted the engine. After about a minute, engine light came on, and had a DTC on the laptop. Seems to confirm there is a good MAF signal to the ECM.
So...........it looks like we're down to either a laptop/software issue, or loss of signal from the ECM to the OBD port. Downloaded the latest HP Tuner software, tried again. Problem persists.
I have the GM tech who installed the clutch coming tomorrow with his Tech II. I'm hoping he sees is a MAF signal at the OBD port. If he doesn't, looks like some tearing down needs to happen to trace the problem.
If the signal is there, problem is either software, laptop or proprietary HP Tuner cable. Unfortunately, that would make it difficult to modify the programming to take advantage of the improved components.
If anyone can offer suggestions where else to look for the MAF problem, I'd appreciate any help.
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