[Gmecm] TBI Fuel problem

[dgilbert78 at juno.com]

Hello: Try the test with the fuel filler cap loose??
Darryl...
On Sat, 12 Aug 2006 17:37:10 -0500 (GMT-05:00) Craig Smith
<kc5aeq at earthlink.net> writes:
> Everyone
> 
> I'm having a fuel pressure problem with a conversion we're 
> performing on my fathers MGB.  The fuel system is plumbed just as a 
> stock Chevy TBI system running at 16# With an external Carter fuel 
> pump mounted in the right hand battery box about three feet from the 
> tank.  The fuel return from the tbi is plumbed back to the tank 
> dumping about an inch from the tank bottom. 
> 
> After running for about 5 miles I'm loosing fuel pressure.  It acts 
> like a vapor lock condition.  After it sits a few minutes it cranks 
> and runs fine until it heats back up.  I figure I'm picking up heat 
> from the engine compartment.  Has anyone placed an aftermarket fuel 
> return regulator downstream of the pump returning to the tank and 
> blocked the return at the TBI?  Is the fuel return thru the TBI used 
> to cool the injectors, or does it have another purpose? 
> 
> Thanks
> Craig
> 
> 
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