Surging idle.

msggunny

Well-known member
Aug 3, 2007
2,948
2
Holly Ridge, NC
So my 2008 LR3 w/4.4v8 surges at idle when you first start it up. It usually lasts a few min, and then evens out. No codes, 140K on the clock.

I am thinking MAF, any ideas?

Thanks,
 

JUKE179r

Well-known member
Sep 14, 2016
456
36
Suffolk, UK
Hey Gunny...
I don't know if an LR3 has an IAC valve but if it does take it off and clean it out with carb cleaner. That is what controls your idle speed.
 
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OttoSmyth

Member
Jan 21, 2020
10
2
Truckee, CA
Clean your throttle body. Be very careful to move the throttle plate gently when you open it by hand. Don't allow it to slam shut. Not sure why, but I've seen throttle motors fail with rough handling.
 

Stocksuspension66

Well-known member
Mar 26, 2020
66
3
California
I unplug the throttle body and use a small piece of scotch brute with a little wd40 and scrub away the carbon deposits. Don’t spray carb cleaner. It will remove the Teflon grease in the throttle plates in the throttle body and cause a failure