[Temptme]

Hello everyone,

I am hoping that someone here can help me diagnose what may be wrong with my GT. Upon attempting to start the car this morning, the only way I can get it to run is if I step on the gas while turning the key in the ignition. As soon as I let my foot off the gas the car dies completely. As soon as the motor idles down, it dies. I am thinking a fuel delivery problem may be the issue, possibly the fuel pump. I would go with that instinct except that I always assumed if it was the fuel pump it wouldn't start in the first place.

Any input or suggestions?

 

[GP_Pimp]

Hey Joel,

Check your plugs for me would you? I know you've been a GT guy for awhile, but the ONLY time my L36 motor had that problem was when I let a leaky upper intake plenum go for too long.

 

[Temptme]

Lee,

I will go ahead and check the plugs. What exactly do you want me to be looking for? I have a suspicion that my intake manifold is leaking slightly since I am throwing a P0171 lean code when I let the car idle.

What about possibly the fuel pump resistor being faulty?

 

[GP_Pimp]

Joel,

Checking the plugs should tell you if your burning coolant at all through the combustion chamber. Just take a peek and see what they look like. Interesting to see your throwing a lean code at idle. That was never something I experianced.

As far as the fuel pump resistor, I do not think so, IIRC L36 equipped cars pumps run on "high speed" only, so there is no resistor, also I believe in 2001 or 2002 they quit putting those resistors in, and the pumps run on high speed all the time.

 

[Temptme]

Lee,

Thanks for the advice! I will look into this further tonight and get back with you.

 

[GP_Pimp]

No Problem Joel.

 

[BIG JEFF]

Joel'


I would search for vacuum leaks as well. I have seen plenum bolts come loose, and have seen brake booster hose
fittings crack. Also a poorly sealed intake insert can be the culprit.


BIG JEFF

 

[fast_redgt]

temptme, give me an e-mail address and i'll send you the diagnostic work sheet for p0171, I'd post it in here but copy and paste dosen't work properly in this forum

 

[Temptme]

Lee,

Plugs looked fine. Normal wear for the 10,000 miles since I had changed them. I'm currently running Autolite 605's.

Jeff,

I recently fixed my vacuum leak problem so that is not the culprit. There could be one elsewhere though.

The problem stopped occuring after I disconnected the MAF sensor and cleaned around it and reinstalled it. Hopefully that will be good enough!

Thanks for the assistance everyone!

 

[disturbedjoe]

Sounds like that car all of a sudden became carborated . I would have to do the same thing to my old 86 Century before it would start. Hope you get the problem fixed

 

[Fish]

I dont know, it really sounds like a vaccum leak. I forgot to plug in the vaccum line to the TB when my HVII came out and it wouldnt stay running until it got plugged back in. Make sure all the vaccum hoses are plugged in well with no leaks.