Question about 2001 Isuzu Rodeo

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2001 Rodeo rough idle in drive, and sometimes on the highway

Have a 2001 isuzu rodeo with 142K. Now idling rough in drive. No check engine light or any other failure light lit. Have had the throttle body cleaned and the egr valve replaced. Where there is no CEL on, I am lost for now.
Any ideas...
Thanks,
--Lou

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  • randyrust3 May 11, 2010

    I'm seriously looking to buy a '04 ISUZU RODEO 4x4 with 164,000 miles on it. Engine is the optional 3.5 L v-6.  It is sooo clean everywhere, you would think it only had 20,000 miles on it. The fluids look great. Under the oil fill cap shows no blow by residue. Problem....  the EXHAUST PIPE IS VERY BLACK. Upon starting when cold, it shows faint black smoke for about 30 seconds, then seems to clear with a little bit of revving. Then it looks good.No lights come on, and it drives just fine.  What do you think?  Thanks...  Randy   in  Ocala, Florida

  • Anonymous Mar 29, 2014

    battery replaced and battery light and brake light come on while driving

  • Anonymous Mar 30, 2014

    Replaced AIC valve, TPS,rebuilt Throttle body,cleaned&tested injectors,set timing 10deg btdc

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Check the overdrive accumulator cover on the transmission for any leaks. This can cause some rough idle situations and minor slipping but if caught early enough isn't bad to fix.

Posted on Mar 27, 2009

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Listen for a hissing sound.......plastic intake gaskets are your likely problem....u can lremove bolds and tilt common chamber to one side and slip gasket in and then tilt the otherway for other gasket.
hope it helps

Posted on Feb 15, 2009

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