Fuel in Throttle Body
Thread Starter
Cruising
Joined: Nov 2014
Posts: 10
Likes: 2
From: California
Fuel in Throttle Body
Today I took a look at the throttle body and there was fuel in the throttle body and some in the hose from the MAF to the throttle body. I checked the vaccuum hoses from the fuel pressure regulator to the plenum there was no fuel.
Car has been having trouble cold starting, sometimes it will stall, then it will start rough and it'll blow black smoke, then after a few moments it'll clear up and run smooth.
Anyone have any insight? It's a 1989 L98.
Car has been having trouble cold starting, sometimes it will stall, then it will start rough and it'll blow black smoke, then after a few moments it'll clear up and run smooth.
Anyone have any insight? It's a 1989 L98.
Team Owner
Joined: Jul 2004
Posts: 28,475
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From: Hartford WI
First thing I would try is to run the car without the hose connected for a bit. Cap off that nipple. Under pressure, the fuel might come forth. If nothing else, wait till tomorrow and see if it is still wet without the fuel pressure regulator hose. It might be illuminating.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
Seriously, I agree with you however he has reported he didn't see any fuel so I'm not sure where else to go.
Instructor
Joined: Jun 2013
Posts: 116
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As Benny42 said in post #3, "Don't ignore or put off the repair."
That fuel you see in your throttle body and in the flexible connecting tube to your MAF indicates that you have fuel in your plenum, as well.
Gas + heat/sparks = fire
That fuel you see in your throttle body and in the flexible connecting tube to your MAF indicates that you have fuel in your plenum, as well.
Gas + heat/sparks = fire
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
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Thread Starter
Cruising
Joined: Nov 2014
Posts: 10
Likes: 2
From: California
First thing I would try is to run the car without the hose connected for a bit. Cap off that nipple. Under pressure, the fuel might come forth. If nothing else, wait till tomorrow and see if it is still wet without the fuel pressure regulator hose. It might be illuminating.
Thanks for the tip!
Team Owner
Joined: Jul 2004
Posts: 28,475
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From: Hartford WI
Burning Brakes
Joined: Jan 2015
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I recommend getting GM plenum/throttle body gaskets. They seem like to be a plastic type material that doesn't really leave a mess behind when you remove the parts in the future unlike the aftermarket paper gaskets. Also I've reused the GM gaskets since they don't get damaged when you take the parts apart later unlike the paper gaskets that rip and leave a mess behind.
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Team Owner
Joined: Jul 2004
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From: Hartford WI