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  #1  
Old 07-17-2007, 04:21 PM
dgreif
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Cool 01 Altima idle prob

Bought an 01 Altima, 90k mi, history unknown. Engine and trans quiet. Idles at 950+ rpm, A/C on or off. Have done lots of internet mining on this prob. Did the ignition on/off re-learn procedure. Can get 700 rpm idle sometimes but turning the A/C on/off still leaves it stuck at 950-1000. Sprayed the intake manifold, no changes. CEL is not, has not come on. Spoke to a Mazda mechanic (friend) who conferred w. a Nissan guy about it. Nissan mech. says they sell lots of IACV's and that's probably the issue. Since that's a big labor cost job I'd like to hear about ANY other possible causes I can investigate. thx----D
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  #2  
Old 07-17-2007, 04:28 PM
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Try removing and cleaning the Iacv brfore you replace it.
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Old 07-17-2007, 06:58 PM
dgreif
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I think I looked at that in my Haynes manual. Can't check it again right now cuz I'm at work. I didn't do it cuz I think it describes removing the intake first. Does that sound correct? This is my only car so it's an issue. Also, I'm in Mesa, AZ and it's 110 degrees.
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Old 07-17-2007, 07:02 PM
dgreif
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Do you have an opinion about my poor fuel economy problem?
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Old 07-18-2007, 02:18 AM
chrisg74
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check the intake gasket( big $ job ) and check your Mass Air Flow meter. I have done them all myself, the intake is not a fun job. I have heard alot of problems w/ intakes and MAF sensors going bad. You can remove the IAC w/out removing the intake
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Old 07-18-2007, 12:04 PM
dgreif
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Yes, I was wrong about having to remove the intake to get at the IACV. Haynes manual just showed it that way for illustration purposes. I sprayed the manifold once and noticed nothing but may do it again. I considered the MAF issue so I got some CRC MAF cleaner this AM and will do that tmro. Will also clean the throttle body since I'll have the airbox out. THEN I'll decide on the IACV.
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