Question about 1993 GMC Sierra

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My truck will not fire immediatly without ether. Once the ether gets it started it runs for a few seconds then dies. I just replaced the fuel pump and all the lines seem to be clear. What's keeping it from running?

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Fuel filter?..or vac acctivated fuel regulator..check w/ vac pump...is new pump running do you hear it relay clicking ????

Posted on Mar 25, 2011

  • aalata01 Mar 25, 2011

    The pump comes on we can hear it. We were thinking also that there might not be enough pressure building up in the system. so we're gonna pressure check it tomorrow. I kinda think the pump might be a dud.

  • Mot Smith
    Mot Smith Mar 25, 2011

    Good call even a new one can be bad.. good luck..

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3 Answers

Why does it start on ether but will not run without it?


Because it is not getting any fuel! as soon as the ether burns up if no fuel then it quits. check all fuses and relay for fuel pump. to check fuel pump to see if its running. have someone turn the key to start, while somebody is under car at fuel tank. hold hand on tank, if it works you will feel the vibration from pump. most relays for fuel pump are in under hood fuse box. a fuel pump if good, will only run a few seconds to build up pressure in line. when engine starts it runs continuously. so you may have to turn key on a few times. Good-Day!

May 17, 2014 | 1994 Land Rover Discovery

1 Answer

After replacing fuel pump car runs when idling but not while driving


change your fuel filter and check your pressure regulator

Mar 22, 2014 | Ford Escort Cars & Trucks

1 Answer

Why does my idi start and die after seconds? Could be because pumps turned down to low? HELp


A possibility is that the pump may have been turned up instead of down. And it is flooding the cylinders. Or your air and fuel ratio needs re adjusted. because, your getting to much air for less fuel.

Aug 29, 2013 | Cars & Trucks

1 Answer

Wont start, no spark anywhere


Check the spark, remove the fuse to the fuel pump and remove one of the spark plugs. Connect the plug to its lead and position it well away from the engine against the truck frame (do not hold it) and turn the engine over, check the spark. If no spark it most probably a faulty coil. Check the impedance of the spark plug leads and replace any that are much higher than the rest. My guess is that you have spark but no fuel, What?... OK this is what I think is wrong. Your pump is fine when at position 2 on the ignition switch however when you switch to position three to fire the engine the power to the fuel pump is momentarily disconnected. A leaking fuel pressure regulator or injector would drop the pressure in the fuel line and at the same time flood the engine making it impossible to start. Once you start the engine with ether the ignition is back to position 2 and the pump can make good any loss in pressure but because the intake mix is rich this will cause the engine to run rich too. A good fuel system is capable of delivering 40 - 50PSI of fuel pressure and when switched off up to 90% of this pressure should be maintained for about 5 minutes, if it cannot check out the fuel pressure regulator and injectors. The fuel pipe should be capable of filling a pint pot in about 15 seconds, if it cannot check out the fuel filter is clogged.
Hope the above gives you some pointers

May 21, 2010 | 1998 Chevrolet K3500

1 Answer

Engine starts but dies immediatly unless i keep pumping gas


Check the electrical for key on power to the fuel pump relay, it sounds like the pump will only run in the start position.

Jul 19, 2009 | 1988 Chevrolet C1500

1 Answer

My Mazda mx3 starts up idles for a couple seconds then dies.


Before you replace the fuel pump, I would check the cheaiper parts first. Such as fuel filter and injectors.

Jun 17, 2009 | 1992 Mazda MX-3

1 Answer

88 jeep cherokee turns over but won't start... as if its out of gas... its not!


Try spraying a little ether in the throttle body/carb and if it starts and runs for a little bit then dies then you have a fuel problem. Probably a pump or fitler. If you replace the pump also replace the filter. Note: if you are trying to start it with the ether in it and its not starting and you see a little fire keep turning it over to **** the fire into the engine, etherwise you will burn up your glaskets.

Apr 11, 2009 | 1988 Jeep Cherokee

1 Answer

No power to fuel pump, relay is good, engine cranks over but won't start.


You need to follow a detailed troubleshooting procedure in a repair manual.
Check for spark plug fire during cranking after it dies.
No spark = ignition problem= computer will not fire injectors, and possibly cut out pump also.
Good spark = pump wonky, or power to pump system.
Also, other quick tests... when the thing dies, and then you crank,
1) Thump the fuel pump in the tank, if you can. A bad fuel pump might start up again.
2) Shoot some ether carb cleaner in the TB. If it only fires off the ether, the ignition system is no longer suspect.

Oct 13, 2008 | 1992 Dodge Dakota

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