I have replaced the electric fuel filter underneath the car also. If I disconnect hose at engine or underneath at electric pump I can get the gas to flow thru by inhaling on the hose. What else could cause the gas not to flow to the engine?
SOURCE: 95 Chevy Caprice won't start unless I disconnect the fuel line.
Liquid gasoline by itself won't burn in the presence of a spark -
unless ... Semi-related, but be on the lookout for failing fuel pumps
due to states ...
http://www.autoblog.com/2006/08/03/autoblog-maintenance-101-in-tank-fuel-pu...
http://www.2carpros.com/topics/stalls.htm
SOURCE: 1992 Pace Arrow Motor Home 454 Chevy...not getting fuel to start
After you dump the fuel in the throttle body it will continue to run on its own or die as soon as it burns up all the fuel you dump in? Do you have access to (Noid lights)? Are both plugs attached to the distributor?
SOURCE: 1990 Caprice Brougham turns over
the gas line ibeaten the filter and the pump is plugged or pump isn't getting pawer
SOURCE: Replaced bad fuel pump, installed
Hi, Ok you have confirmed that it's not a fuel problem. You need to check for spark. Pull the coil wire off of the coil(secondary lead-looks like a spark plug wire) Have some one crank it over and listen for a popping sound. IF yes, spark is at the coil, that means all ignition sensors are working. Next check for spark at ends of wires after cap. IF no replace cap and rotor. IF yes remove a couple spark plugs and check for fouling(wet, fuel etc...) IF yes replace or clean plugs and retest for starting. IF no spark is present at coil you need to scan computer and watch for rpm signal. IF no rpm signal, replace crankshaft sensor with OEM delco part. BIGGEST problem with these engines is Cap and Rotor burn out.
SOURCE: I can pour gas into
That should be a TBI (Throttle Body Injection) and not a carburetor. I think 85 was the last year for Carbs in S trucks (2.8L).
You should be able to hear the pump run for about 2 seconds when you first turn the key on (wait a few seconds when turning the key off and on to hear pump run). If you don't hear the pump run then there could be a bad relay or its circuit.
The relay should be on the firewall. Have a helper listen for a relay to click. A person can even feel a relay click when the key is turned on if its working.The computer sends a ground signal to the relay to activate it.
But the oil pressure switch also is part of the circuit. When the truck has oil pressure the switch will send power to the fuel pump.
So even if you had it running with gas being poured in the TB, that could have been long enough to build oil pressure (as long as the switch is good)
Then check your connections at the sender. There is also a ground wire on the frame. I think it is near the filler hose just about behind the bracket the bed sits on. Make sure there is a good ground.
You can look up free diagrams at autozone.com. All you have to do is register and that is free as well. That should help you follow the circuit for the pump.
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