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12-22-2006, 11:12 AM
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#1 | |
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AF Enthusiast
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'86 bouncing idle
A friends '89 300zx likes to rev up and down when idleing, but it doesn't do it all the time, what could possibly cause this
Thanks
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1994 Honda Civic - D15B7 W/5 spd 2000 Olds Intrigue - 3.5 Cory |
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12-23-2006, 03:03 PM
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#2 | |
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Re: '86 bouncing idle
try unplugging your FCID or AAC unit and see if that levels out the idle... also look for vacuum leaks... usually they just cause high idle but if it's an intermittant leak then it could cause fluctuating... this is a map of all of the vacuum lines in the engine bay minus the stuff for climate control...
it's also a good idea to do a tune up, it probably won't help the idle issue, but it's always a good idea... if that doesn't solve it, i'd go after the cylinder head temp sensor (CHTS) as they go bad it seems every time you look at them.
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 ZedEx Crew Member #61988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc. blown turbo, under construction.. gt35 coming. |
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12-23-2006, 07:31 PM
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#3 | |
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Re: '86 bouncing idle
Im not quite sure what the FCID or AAC units are, im sure there could be a vacume leak, the motor has 106k from an 87 and the body has 166k on it, but my friend doesnt really care about it
Thanks
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1994 Honda Civic - D15B7 W/5 spd 2000 Olds Intrigue - 3.5 Cory |
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12-23-2006, 07:50 PM
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#4 | |
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Re: '86 bouncing idle
the idle control thing on the drivers side of the intake plenum, right in the middle of it
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ZedEx Crew Member #61988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc. blown turbo, under construction.. gt35 coming. |
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12-26-2006, 09:49 PM
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#5 | |
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Re: '86 bouncing idle
So just umplug them when its bouncing? it doesnt do it all the time, usually when cold, but i will try, thanks
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1994 Honda Civic - D15B7 W/5 spd 2000 Olds Intrigue - 3.5 Cory |
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