It's been several months and I"m still dealing with the same problem with car not getting gas after driving for about 30 to 45 minutes. I took the car out this weekend it stopped again cause the gas bowl is empty but I notice the gas pump is not pumping no gas and I changed the pump a couple months ago because I thought that was the problem. I dropped the tank yesterday and it was clean. Do you guys think the pump is loosing pressure or something. Help

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Comment by Phil Jakubowski on December 28, 2013 at 9:56am
Sorry a 1" fiberglass carb riser plate. We had thought that my fuel may be vaporizing in the carb from excessive underhood heat and the factory plate may not be high enough to keep the fuel from overheating inthe carb. Most plates are metal so radiant heat would still be an issue so I sourced a plastic one. Didn't work anyway but the car would start hesitating on drives and finally shut down altogether. After it cooled down it would restart so we figured a heat problem. It finally worked great last year with the factory riser plate, a new electric fuel pump and open fittings on the line. The fuel pump came with an anti drain back valve but with installing at the lowest point on the frame rail if have not had a problem with having to prime the fuel system after it sits. Hopefully it keeps working!
Comment by James jacques on December 27, 2013 at 10:07pm

hey phil what is a fiber 1 carb riser

Comment by Phil Jakubowski on December 27, 2013 at 5:22pm
It came with the new electric fuel pump
Comment by Tony and Ginny 429 on December 27, 2013 at 1:36pm
Where is there a one way fuel valve on your cars fuel system ?
This is new news to me
Comment by Phil Jakubowski on December 27, 2013 at 9:04am
I had a similar issue with my caddy. First thought it was a tank problem, tank was clean but I did install a new sending unit while it was down then I Thought it was a heat problem. I installed a fiber 1" carb riser with no success. Changed out to a new electric fuel pump mounted on the frame rail and it worked great...for a while. I then found the one way valve on the fuel line was getting jammed I removed it and installed a new fuel fitting without a valve in it and have not been stranded since
Comment by Tony and Ginny 429 on December 19, 2013 at 10:18am
When was the last complete tune up done on the car ?
Retarded timing can cause more heat to develope than should
If you have any holes in the gas lines from the tank to the fuel pump or the pump to the carb that would explain the lack of fuel
The fact that it runs for the time it does , has me looking at a heat issue as the car is warming
Comment by Russ Austin on December 16, 2013 at 7:48pm

Have you checked the rubber lines on the fuel line? there are 2 to check, possibly 3.

Do a fuel pump test. Its detailed in the service manual.  Engine heat can cause a bad diaphragm to not pump fuel.

Comment by Aaron Johnston on December 16, 2013 at 3:32pm

Check the temp on the intake as well, not just the heat riser.

Comment by Jason Edge on December 16, 2013 at 7:07am

I think Tony was referring to the heat riser on the left driver side. If it is staying closed or partially closed, it can cause excessive heat through intake under carb, and will affect performance with the back pressure on the left exhaust since most will be forced across the engine to exit the right side. This was a method in the day to speed up engine warm-up on cold cranking, and the heat riser butterfly opens pretty quickly as the engine heats up.

Comment by Tony and Ginny 429 on December 15, 2013 at 11:27pm

Be sure your exhaust heat damper in the passenger side exhaust is open and not causing very high heat to form under your carb ,in the intake manifold

Gas in carb will evapoate if heat gets to high

Do you have the correct gaskets and the carbs insulator in place , under the carb ?

I feel for you with that problem  UGGGG ! !

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