bubbleguinea Posted February 14, 2008 Share Posted February 14, 2008 timing my car recently, at 3k rpm, the engine revs up and down...anything about 2.7k rpm actually... checked sds systems, my duty cycle is constant, then when the car sputters, it goes to 0 percent. what would cause this? im leaning towards bad ground...all other sensors are GREEN and good... i was thinking bad spark, but my tach signle is good to go too.... anythoughts? ive got everything grounded to two different grounds...and im talking 5 different things... i might run a seperate ground and try to isoloate it..if that doesnt work, im going to borrow a friends injector/cap/rotor/wires and see if that fixes it, but i dont think it will... the only thing that messes with injector pulse width is power, and the numbers plugged in....and the numbers are all good too... any help guys? Quote Link to comment Share on other sites More sharing options...
pallnet Posted February 16, 2008 Share Posted February 16, 2008 Andrew If you're talking about a little "surging/searching". I had seen TPS's do this on factory EFI systems on other cars. Quote Link to comment Share on other sites More sharing options...
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