4runner 7MGE swap idle problem

grabber · 06-25-2008, 06:50 AM

I just swapped a 7MGE into my 4runner. pretty sure i've got everything hooked up right and it runs great... only problem is at low rpm it idles up to around 2000 rpm and then drops off to 500 rpm and back up. it does this consistently. 3 seconds at 2000 rpm and 1 at 500 rpm. I'm lost on this... any ideas? the CEL is not coming on...

Chambers · 06-25-2008, 02:15 PM

Make sure there is no vac leaks. Check all of the vac lines running around the throttle body and intake manifold, also your intake behind the MAF sensor.

supramacist · 06-25-2008, 02:34 PM

The tps dashpot may need to be replaced.

Ofcourse you would probably be throwing a code 51.

7M-ERIK · 06-26-2008, 11:45 PM

It might also be the idle speed control valve. Test the plug or listen to see if it makes a noise when you shut the car off.

06-25-2008, 06:50 AM	#1
grabber Stock Join Date: Jun 2008 Location: waiparous Posts: 7	4runner 7MGE swap idle problem I just swapped a 7MGE into my 4runner. pretty sure i've got everything hooked up right and it runs great... only problem is at low rpm it idles up to around 2000 rpm and then drops off to 500 rpm and back up. it does this consistently. 3 seconds at 2000 rpm and 1 at 500 rpm. I'm lost on this... any ideas? the CEL is not coming on...

06-25-2008, 02:15 PM	#2
Chambers walbro fp Join Date: May 2007 Location: USA - Harford County, Maryland Posts: 481	Make sure there is no vac leaks. Check all of the vac lines running around the throttle body and intake manifold, also your intake behind the MAF sensor. __________________ Whats in the garage, well.... in the yard. 1986.5 Toyota Supra - NA - 5 spd 1986 Ford Ranger Lowrider - 5 spd 1984 Ford Ranger XLT - 7" Lift - 4X4 - Auto "Stuck in the 80's"

06-26-2008, 11:45 PM	#4
7M-ERIK Stock Join Date: Jun 2008 Location: Connecticut Posts: 11	It might also be the idle speed control valve. Test the plug or listen to see if it makes a noise when you shut the car off. __________________ '89 Turbo 5spd Targa - 3" exhaust, RT Downpipe, Suprasport elbow, big fmic & pipes, Tein HR coilovers, NGK plugs/wires, Lexus AFM, Apexi SAFC, ARP head studs, TurboXS mbc, removed all A/C garbage, elec. fan, rebuilt CT26, mild port matched turbo hot side

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06-25-2008, 02:34 PM	#3
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	The tps dashpot may need to be replaced. Ofcourse you would probably be throwing a code 51.