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Old 02-21-2011, 07:02 PM
range0rover range0rover is offline
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Join Date: Nov 2010
Posts: 20
Default throttle body/intake gook

In my quest find vacuum leaks (the CEL on my 2.5/4 is on with a P0171 code) I removed my throttle body to check the small hose from the evap return on the bottom side. When I removed the body I noticed alot of black gook on the inside of the throttle body (up to the blade) and inside the intake (see pic).

Is this normal? This stuff is pretty thick and simi-wet. It dissolves with spray carb cleaner but since it's so thick I am soaking the bottom of the throttle body tonight in cleaner to ease the process.

Another question.....should I worry about taking the intake off and cleaning it or should I just let it be? I'm thinking it should'nt be there.

Also, any thoughts on if this is related to the P0171 code? I dont think it is the cause of the lean code, but could this be the symptom from all the extra fuel the system is injecting to "equalize" the detected lean condition? If so, any thoughts on a specific fix other than the usuals for a P0171 code?

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File Type: jpg throttlebody_intake.jpg (96.9 KB, 24 views)
2000 Ranger XLT, Ext Cab, 4x2, 2.5L 4 cyl, 5spd man

no modifications

Last edited by range0rover; 02-21-2011 at 08:43 PM.
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Old 02-22-2011, 06:48 AM
4b316 4b316 is offline
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Join Date: Nov 2010
Posts: 293
Default Re: throttle body/intake gook

Just a byproduct of sucking the crankcase flumes out and reburning.
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Old 02-23-2011, 10:45 PM
mariom676 mariom676 is offline
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Join Date: Dec 2009
Posts: 14
Default Re: throttle body/intake gook

Just throwing it out there, but I was throwing the same code for a while.
I replaced the pcv and the upstream O2 (the one on the manifold) and it went away. It can't hurt to check your pcv valve and see if its still good considering they are like less then $3. My code never came back, but again its just an idea.
'99 Ranger 2.5L 5sp 2wd
Explorer goodies inside
32's and bags, pre runner inspired
Almost an 06 wannabe.
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