Odd Surging Issue
#1
Odd Surging Issue
I'm going to break my own rules and post a desperate plea for help without a lot of data. I've got a track event booked for next weekend and went to the dyno today. I thought the car felt weak and noticed it surging a bit at WOT. I replaced the plugs and COP coils thinking that was it and hit the the road this morning. On the dyno the car was a hot mess, surging and generally not pulling smoothly and sure enough the dyno graph looked like a seismic readout and only 200whp at 15psi. AFR'S are rock solid at 11.6ish and 15 degrees of timing.
Question is this, could a bad crank or cam sensor cause spark issues without showing up as missed sync counts? I grabbed some logs so I'll post those soon.
I've ordered the sensors and they'll be here Tuesday but I'm running out of time to order parts ahead of traveling Friday, anything else you can think of to try? Just throwing money at it at this point.
Question is this, could a bad crank or cam sensor cause spark issues without showing up as missed sync counts? I grabbed some logs so I'll post those soon.
I've ordered the sensors and they'll be here Tuesday but I'm running out of time to order parts ahead of traveling Friday, anything else you can think of to try? Just throwing money at it at this point.
#7
I've had my crank sensor fail once on my car. It feels exactly as you describe as a surging. I never logged it though so I'm not gonna be much help in that respect. Im assuming you've checked the crank sensor Gap already. Is the timing wheel and crank pulley tight? Those 4 m6 bolts that hold it on have been known to shear.
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09-16-2010 02:39 PM