cygnusx1 Posted November 2, 2003 Share Posted November 2, 2003 My turbo Z conversion ran well from day one but now its developing a really bad power drop off under load. It pulls nice and hard with 1/4 to 1/2 throttle and builds boost to 7psi if if I creep up the gas pedal a bit. After 1/2 throttle it falls flat on its face and coughs, pops, and sputters and has no power. It is a BONE STOCK '83 turbo setup in a 76 Z with 100K miles on the motor. NEW-> CAP, ROTOR, WIRES, PLUGS, INJECTORS, FUEL FILTER, O2 SENS. Timing tried at 20 and 23 BTDC, Tried running with Knock Sensor Disconnected, Disconnected and reconnected cleaned all EFI Plugs. Compression 135 to 140 all cylinders, Head Temp sensor reads 1750ohm @ about 80degF., smells rich and bumpy idle (always did) ANY IDEAS? It is making me nutZ. Quote Link to comment Share on other sites More sharing options...
240hoke Posted November 2, 2003 Share Posted November 2, 2003 Sounds like it might be a TPS issue, check all your wires there. -Austin Quote Link to comment Share on other sites More sharing options...
Cody 82 ZXT Posted November 2, 2003 Share Posted November 2, 2003 I always look for a vacum leak first. I once had one similar to what you are describing. Turned out the outlet pipe from the turbo was raising up just slightly under boost. Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted November 2, 2003 Author Share Posted November 2, 2003 WOOHOO!!!!!!! Burning Rubber Again!!!!!!!!! I got it! The EFI wiring harness was routed too close to the clutch pedal so when I pressed in the pedal, it would nudge the wires. This caused the ECU plugs to loosen up a little everytime I pushed in the clutch! I pushed the plugs in good-n-tight on the ECU and re-routed the harness and WOW it runs great!!!!!!! AWESOME. I got my baby back. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 2, 2003 Share Posted November 2, 2003 nice... always nice when it's something easy like that Quote Link to comment Share on other sites More sharing options...
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