Help...Engine revving out of control :(
#1
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Help...Engine revving out of control :(
Well after a night of probably a few too many nitrous runs, my car is freaking out. At the end of the last run the engine "stuck" at about 3k at though the throttle was stuck. I threw it in neutral and it started revving like crazy, climbing toword the rev limiter so I shut the car down, shut off all the switches, and closed the valve on the bottle. I popped the hood and check for anything out of the ordinary. After disconecting my MAF translator and checking for a sticking throttle blade or anything else out of the ordinary, I started the car back up and it was fine. Then on the way home I was on the highway and this riced out probe tried to race me so I got on the throttle and it did the same thing...acting like it was stuck. With my foot completely off the throttle it would stay at about 2k, and when I put it in neutral it would rev sky high. Pulled over to the side of the road, shut it off and waited for a few minutes. This time it revved to about 3-4k then settled back down after a few seconds. It was fine all the way home, but I was very very very easy on it. When idling on the way home it threw a code...when I checked it, it came up 0420: Catalyst efficiency below threshold (bank 1).
Did I F up one of the cats or O2 sensors with my night of hedonistic over-spraying? Anyone ever see anything like this before? Any help is greatly apprecitated. If this would be better suited in a different forum, let me know.
P.S. My setup is SLP lid, true dual catback with stock cats, stock MAF de-screened, NGK TR6s, MSD wires, NOS 5177 style dry kit.
Thanks
Did I F up one of the cats or O2 sensors with my night of hedonistic over-spraying? Anyone ever see anything like this before? Any help is greatly apprecitated. If this would be better suited in a different forum, let me know.
P.S. My setup is SLP lid, true dual catback with stock cats, stock MAF de-screened, NGK TR6s, MSD wires, NOS 5177 style dry kit.
Thanks
#3
At the end of the last run the engine "stuck" at about 3k at though the throttle was stuck. I threw it in neutral and it started revving like crazy, climbing toword the rev limiter so I shut the car down, shut off all the switches, and closed the valve on the bottle.
Altho, if it does it with the bottle closed, that cant be the case....HMMMMM.
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Originally Posted by Deckhand
sounds kinda like your TPS or IAC came unplugged?
Jim C.
PS- My Turbo Buick would fry an O2 sensor every now and then when I had the gas on it.
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Well I pulled the intake apart and cleaned the MAF, the IAC and the TPS with contact cleaner, then cleaned everything I could in the intake with carb cleaner. It seems to be ok so far but I haven't had the bawls to bring it to WOT yet Tomorrow I'll climb underneath it and check out the O2s and see if it will behave at WOT *crosses fingers*
Thanks everyone
Thanks everyone
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When the car does this, close the bottle and watch the pressure. If the car calms down when the pressure hits zero, you have a leaky solenoid. Crap can get stuck under the plunger of a solenoid and cause it to leak nitrous.