Question about 1999 GMC Suburban

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Replaced fuel pump,fuel filter checked relay has good fuel pressure.Every once in while truck will not start.

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Two possibilities that stand out here are the throttle position switch or the crankshaft position sensor. Especially if this doesn't affect the running of the engine at highway speeds.

Posted on Sep 06, 2009

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How to troubleshoot a no fuel problem, no fuel at fuel rail in a 2000 olds sillhouette.


First check there is battery voltage to the pump and the pump starts when the ignition is switched on , if not check fuse and relay, check wiring from relay to pump. If ok and the pump is working , check for fuel blockage from the tank inlet to the pump , some have a sock type filter in the tank pick up tube, if all ok remove the fuel filter , switch on and fuel should flow at the filter, fit a new filter, if still no fuel at the rail fit a fuel pressure gauge an check for low pressure , if ok, the fuel pressure regulator may be stuck causing a air lock replace it.

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If the pump continued to run after shutting off the car you fuel pump relay was probably staying latched. I would replace the relay as well based on your info. Along with the pump the fuel filter should be replaced too and fuel pressure should be checked. Make sure your ground is good also.

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Starter switch, starter relay, or starter motor. If it cranks, but don't start, check fuel pressure. If pressure is not good, then replace fuel filter, fuel pump relay, and/or fuel pump (in that order) If fuel pressure is ok, then its ignition. check and/or replace coil or igniton module.

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Verify that you have fuel pressure the next time it does this, more than likely you don't. Cycle the key from off to on about 10 times before you actually attempt to crank it over. If it fires up after doing this then you have a bad fuel pump and your loosing system pressure over time beacuse its leaking down back through the fuel pump. Replace the fuel pump, fuel filter, and the fuel pump relay.

Aug 20, 2011 | 1998 Chevrolet C1500

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Im working on a 95 s10 blazer.It has the 4.3 engine.It will only start if it is sprayed with starting fluid.the fuel pump,fuel filter,and pressure regulator have all been replaced.Seems like the system...


It sounds like the fuel pump is not working. Perhaps the install was not completed correctly. Things to check, fuel pump relay, wiring, voltage to the pump.
The priming happens as soon as you put the key in and turn it to "acc" (you may hear a humming sound). Then once you turn it to "start" the injectors and spark plugs start firing.
Another possibility is that the fuel filter was installed backwards.

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96s10 starting problems replaced throdle position sensor,fuelpump relay,no start shot of starting fluid fires right up and runs


Check the fuel pressure at the shredder valve. You should have 60psi to 65psi with the fuel pump primed and engine not running. Once the engine has been started, there should be a 5psi drop. Make sure the fuel filter has been replaced and that the fuel pump is making at least 60psi. Anything less or more then 65psi will not activate the fuel injectors, the other thing to is that the spider injection system on the vortec are know to go bad and you may have to replace the system. Good luck and keep me posted, be glad to help you get your S-10 running 100% again. 

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Fuel Pump relay, Fuel Pressure Regulator may be faulty. A relay can be tested with multi-tester, and a pressure tester for regulator.

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92 dakota cranks and wont start


Possibly you have a porous sump in the fuel tank.

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The engine turns but the car won,t start.


You will need to check for fuel pressure or dirty filter. If you do not have fuel pressure; be sure to check fuses or any relay pertaining to fuel pump (if electric). If fuses and relays are good check or replace fuel filter. If the fuel pump is mechanical disregard fuses & relays and check or replace fuel filter. If this does not resolve the problem then the problem could be the fuel pump if mechanical, If its an electric fuel pump it could be a fuel pressure regulator, fuel pump, crimped fuel line or other wiring issue.

These are the most common things I run across, oh, a crimped fuel line can cause the problem in either case electric or mechanical. Hope this helps in some way, been awhile sense I worked with an older car.

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