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engine feel shutting off

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Old Aug 1, 2004
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Unhappy engine feel shutting off
omg... ok... here's the problem..
I have an OBX header in my car and a HKS rear section on my car, and recently I installed the O2 sim in it, then took it for an oil change. Next thing I noticed that when I start the engine idle... the RPM is dropping constantly and when I'm running with my car at around maybe.. 30 mph. RPM cant go up any higher than 3000 and sometimes it comes back normal... and sometimes I feel like engine is shutting off on me when idle... I feel like I cant push over 3000 RPM... (the engine check light is not on, since O2 sim)
my car is pretty new... only has 24000 miles on it... I DONT know what to do... help me........
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Old Aug 2, 2004
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your ecu needs to calibrate, take the ecu fuse out and put it back on after a couple of mins.... that should fix it... and also clean your air filter
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Old Aug 2, 2004
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Can I reset my ECU by reconnecting battery... that's what I've been hearing...
Thanks a lot...>_<
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Old Aug 3, 2004
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^^ yes. disconnect the negative terminal for a few min ... turn it back on ... wait for another few min with engine idling (don't press the gas), turn it off, turn it on again
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Old Aug 3, 2004
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^^^ yea I think so .
what's up with ur car lately richard?
I saw ur car at AMC16 last night
what did you see? I saw the whitecastle ****..It was pretty funny hehe
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Old Aug 3, 2004
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alright... I tried reset ECU by reconnecting battery... and the problem still remains...
Where can I find the ECU fuses? HOW...? >_<
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Old Aug 3, 2004
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spark plugs?
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Old Aug 3, 2004
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Originally Posted by HELP_ME
alright... I tried reset ECU by reconnecting battery... and the problem still remains...
Where can I find the ECU fuses? HOW...? >_<

above the gas pedal I think
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Old Aug 3, 2004
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anyone knows that which wire im suppose to unplug?
so many wires under it...
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Old Aug 3, 2004
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ecu fuses are in the fuse box. the big back one and the other one pretty big one ... it says on the fuse box cover
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Old Aug 3, 2004
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i removed the fuse box cover... so now im looking for the big black wire now? and unplug it?
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Old Aug 3, 2004
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wire? ... it's fuse, not a wire. Look at the fuse box cover.

fyi, disconnecting your negative terminal on your battery works fine to reset your ecu. I would check your spark plugs as they may be busted
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Old Aug 3, 2004
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hmm... interesting point... well i checked those as well... but I cant really tell if they are still ok... if they gone bad... what kind of spark plugs I should get? The Denso Iridium?
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Old Aug 3, 2004
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well, you want to make sure they're tightened enough ... I believe it's 18 foot pounds of torque. Make sure they're gapped all the same. Goto www.densoiridium.com ... their website is very informative about checking plug condition
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Old Aug 3, 2004
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get rid of ur obx headers..they are cheap...perhaps thats the problem..
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Old Aug 5, 2004
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Just take off the header. The ecu is very picky about calculating the correct air/fuel ratio. The O2 sim is probably messing it up.
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Old Aug 17, 2004
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ever find out what was causing the idle problem cause i'm havin the same problem but i don't have a header on mine right now.
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