TBI will only start if I pinch the return line?
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TBI will only start if I pinch the return line?
I put a TBI 350 from a 93 surburban in a Land Cruiser and installed it with a walbro gsl395 pump rated somehwhere between 30 and 40psi and the fuel fuel injectors are barely getting fuel? If I pinch the return line pressure builds immediatly and the engien will start. Any suggestions ? this is driving me crazy trying to figure this out. The store I bought the pump from said that i do not need an additional regulator , that the tbi regulator should be fine with this pump. Why will it only run if the return line is pinched?
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Joined: Jul 1999
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: TBI will only start if I pinch the return line?
TBI only needs 12-14 psi.
What kind of fuel pressure are you getting when cranking over the engine? Don't guess. Put a gauge on it somewhere.
What kind of fuel pressure are you getting when cranking over the engine? Don't guess. Put a gauge on it somewhere.
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Posts: 254
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From: Painesville, Ohio USA
Car: 1989 IROC Z28
Engine: 305 TBI (L03)
Transmission: 700R4 w/ Corvette servo
Axle/Gears: 4th Gen, 3.23, posi, PBR
Re: TBI will only start if I pinch the return line?
Most likely the diaphram on your fuel pressure regulator has failed. You can get the diaphram separately, but an entire TBI rebuild kit is only $25-35 and fairly easy to install.
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