Help! Check engine light after type "O" mod

george16 · 11-01-2003, 11:07 AM

My rig's check engine light came on after i installed the type "O" gasket on the throttle body. Any ideas on what's wrong with it? I rest the battery but it came back again after 10 miles of driving. Thanks.

George

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Dr. Zhivago · 11-01-2003, 12:34 PM

You have a vacuum leak. Check for proper orientation of the gasket, it only fits one way correctly. Check for proper torque of the bolts and nuts that hold the TB to the manifold.

Hope this helps.
G

george16 · 11-01-2003, 01:50 PM

Thanks a lot.

George

MTL_4runner · 11-01-2003, 02:11 PM

Yep, what he said.
Definately a vacum leak there or wrong gasket orientation.

Tacoma Dude · 11-01-2003, 03:06 PM

So should the gasket just go straight on? Or should I try to help the seal with something - kind of like how you use the motor oil on the oil filter before you screw it on?

george16 · 11-01-2003, 03:15 PM

The problem's solved. It was a vacuum leak due to one hose underneath the throttle body not being connected. I didn't see it when i reinstalled because it was directly underneath and i didn't disconnect it on purpose. It was disconnected when i was pulling out the throttle body. Here is a pic of the culprit.

Again, thanks a lot for all your help. Yotatech rocks!!!!

George

3.4v6 · 11-02-2003, 08:51 AM

when i installed the O gasket my rpm's jumped about 500, and from past experiences with making my truck idle higher i got a check engine light , the high idle tripped a sensor and threw a CEL. when i installed my O gasket i just adjusted the throttle cable to lower my idle.

midiwall · 11-02-2003, 09:49 AM

Quote:

Originally posted by george16
The problem's solved. It was a vacuum leak due to one hose underneath the throttle body not being connected. I didn't see it when i reinstalled because it was directly underneath and i didn't disconnect it on purpose. It was disconnected when i was pulling out the throttle body.

I did the same thing... Twice.

Once on my truck when I installed a trottle body adapter two years ago (and didn't find it until Dr. Z spotted it in a picture - ALMOST A YEAR LATER!). Then it happened again - this time by accident - when I installed an O gasket on FunRunner's truck.

Tacoma Dude · 11-03-2003, 01:06 AM

Quote:

Originally posted by midiwall
I did the same thing... Twice.

Once on my truck when I installed a trottle body adapter two years ago (and didn't find it until Dr. Z spotted it in a picture - ALMOST A YEAR LATER!). Then it happened again - this time by accident - when I installed an O gasket on FunRunner's truck.

ahhh.... so the first time you were just testing Dr. Z, right?

midiwall · 11-03-2003, 06:09 AM

Quote:

Originally posted by Tacoma Dude

ahhh.... so the first time you were just testing Dr. Z, right?

Yeup Yeup Yeup.... That's my story and I'm sticking to it.

11-01-2003, 01:50 PM	#3 (permalink)
george16 Registered User Personal Sales Rating: (0) [OP] Join Date: Sep 2002 Location: Florida Posts: 508	Thanks a lot. George __________________ *99 Desert Dune SR5 4WD 5spd, Extended diff breathers, Deck plate mod. Bilstein Shocks, Hella 500 fog lights mounted on TJM T-15, Stubbs sliders, Type "O" Throttle body gasket, Optima Redtop, ARB RD23 rear locker and air compressor, Shackle hangers, Custom catback exhaust with Magnaflow muffler.

11-01-2003, 02:11 PM	#4 (permalink)
MTL_4runner Contributing Member Personal Sales Rating: (0) Join Date: Jul 2003 Location: Montreal, QC Canada Posts: 8,807	Yep, what he said. Definately a vacum leak there or wrong gasket orientation. __________________ - Jamie 1996 4Runner SR5 4X4 Auto Deckplate Mod, Hayden Tranny Cooler, Amsoil Air Filter, OME 881/906 N86C/N91SC Lift Best OBD II scan tool I have used!. .....and I am AMERICAN!

11-01-2003, 03:06 PM	#5 (permalink)
Tacoma Dude Contributing Member Personal Sales Rating: (0) Join Date: Mar 2003 Location: Orange County, CA Posts: 8,345	So should the gasket just go straight on? Or should I try to help the seal with something - kind of like how you use the motor oil on the oil filter before you screw it on? __________________ Peter! 2002 Tacoma 1986 4Runner

11-01-2003, 03:15 PM	#6 (permalink)
george16 Registered User Personal Sales Rating: (0) [OP] Join Date: Sep 2002 Location: Florida Posts: 508	The problem's solved. It was a vacuum leak due to one hose underneath the throttle body not being connected. I didn't see it when i reinstalled because it was directly underneath and i didn't disconnect it on purpose. It was disconnected when i was pulling out the throttle body. Here is a pic of the culprit. Again, thanks a lot for all your help. Yotatech rocks!!!! George __________________ *99 Desert Dune SR5 4WD 5spd, Extended diff breathers, Deck plate mod. Bilstein Shocks, Hella 500 fog lights mounted on TJM T-15, Stubbs sliders, Type "O" Throttle body gasket, Optima Redtop, ARB RD23 rear locker and air compressor, Shackle hangers, Custom catback exhaust with Magnaflow muffler.

11-02-2003, 08:51 AM	#7 (permalink)
3.4v6 Registered User Personal Sales Rating: (0) Join Date: Jun 2003 Location: Daly City, CA Posts: 900	when i installed the O gasket my rpm's jumped about 500, and from past experiences with making my truck idle higher i got a check engine light , the high idle tripped a sensor and threw a CEL. when i installed my O gasket i just adjusted the throttle cable to lower my idle. __________________ =Jason= 2001 Tacoma DC PreReunner SR5 (looks stock to me) S/C and some other crap

11-01-2003, 12:34 PM	#2 (permalink)
Dr. Zhivago Away Personal Sales Rating: (0) Join Date: Oct 2002 Location: Beaverton, OR Posts: 1,588	You have a vacuum leak. Check for proper orientation of the gasket, it only fits one way correctly. Check for proper torque of the bolts and nuts that hold the TB to the manifold. Hope this helps. G

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