Question about 1999 Chevrolet Suburban

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Fuel system starts with starting fluid and runs. hesitates under load, if shut off will only start back up with starting fluid. Changed out fuel filter. pump seems to be running fine but not sure

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There is a "sock" filter on the pump inlet (on the pump, in the tank). You may want to take a look at it. ( aside from hearing the pump running, you did check pressure, right?) Your problem may not be fuel related though. A weak spark condition can give you similar symptoms. It's good that you have chosen one line of "attack" but if after exhausting your efforts in that direction, you still find you have a problem, this would be the next place to look.
good luck

Posted on Jan 16, 2009

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Turns over and over can hear fuel pump come on will start with starting fluid and runs great but when shut off for a little while wont start again only with starting fluid


If the starting fluid works then you have a fuel pump or a fuel pump relay issue. The fuel pump relay allows the pump to come on for about 2 secs and prime the fuel system. Once the engine starts then the power to the fuel pump runs through the oil pressure circuit.
If the car starts on starting fluid and then continues to run... I would lean toward a fuel pump relay issue. Hope this helps, Good Luck!

Aug 18, 2011 | 1996 Chevrolet Tahoe

1 Answer

I know the fluid needs to be changed. It has just started to hesitate to work when I start a turn, but then works fine for awhile. Will it help to have the fluid changed?


It never hurts to change fluids but, hesitation is a product of fuel and ignition, happening at the correct time and in sufficient quantity. Not sure what "hesitates to work" on your car as you were not specific, but any hesitating is generally a mechanical not a lubrication problem.

Mar 21, 2011 | Oldsmobile Aurora Cars & Trucks

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My 200 dodge caravan stumbles after it warms up..when you give it gas. it never shuts off on me, just hesitates and spits and sputters when i start giving it gas. and also just giving it normal gas going...


When was last tune up? Plugs, wires, all fluids & filters..especially fuel filter??? I'd start there and run a good fuel system cleaner through it.

Mar 17, 2011 | 2000 Dodge Caravan

1 Answer

Will not start only backfires and start dieseling.5.7 automatic. hear fuel pump running. ran fine last trip and parked overnight. few times in past week or two. little trouble starting. rough idle for few...


You need 3 things.
Compression
Good hot blue spark to all plugs.
Good gasoline and proper fuel pressure. 63-64 lbs.
If you have all 3 then move on to injector pulse to all injectors.
I think each injector is on a separate driver on that one.
Check for pulse to all of them.

You may be weak on fuel pressure . Even a couple of lbs low on a cold start will cause a no start. Double check cold start cranking fuel pressure. If under 63-62 lbs you have problems.one test is to give it a squirt of carb cleaner not starting fluid. If you get a intake or engine full of starting fluid it can blow things. Carb cleaner will start it if it is a fuel problem and lot safer. Also in the good old days when i was a kid, i used to get a couple of cans of starting fluid and get in the back and have a good starting fluid spraying contest. Good for a big blast if someone lights a match. If it starts then you have a fuel pressure problem. Run the full fuel pressure test and post back pressures.

Here is the guide lines on testing.
Hard to start cold.
Check cold start fuel pressure.
Check engine running fuel pressure.
Check engine running on the road fuel pressure.
Then shut it off and watch for fast leak down.
Pinch off at rubber part or block off return line and check full pressure.
V8 gm engines should have 60-66 fuel pressure.
Cold start should be 64-65 lbs of pressure.
If you do not have full fuel pressure on a cold start the injectors will not squirt fuel. Do not leave home without it.
Engine running should be 60-66 lbs pressure depending on engine load.
Full pressure with return pinched off should be 75-85 or more.
And if it has a fast leak down after shut off you have a leak.


The 75-85 is only a check on the capable full pressure of fuel pump.
If you can not find the rubber return line check full pressure by plugging return line or just or the true full pressure can be taken direct at the end fuel filter.
What are the pressure readings that you have done.
What are your cold start pressure readings?



Feb 01, 2010 | 1998 Chevrolet C1500

1 Answer

My ford v10 engines hesitates under load. It


1 Ignition system not operating properly
2 Dirtyor clogged fuel injector(s).
3 Low fuel pressure. Check for proper operation of the fuel pump and for restrictions in the fuel filter and lines.
4 Fuel injectionor engine control systems malfunction.
5 Vacuum leak at the intake manifold or vacuum hoses.
6 Restricted air filter.
7 Fuel pump or pressure regulator defective.

Dec 19, 2009 | 2000 Ford Excursion

1 Answer

1987 gmc jimmy wont start


yea you have no fuel and sound like a bad harness and the gm's are know for there fuel pump harness's! did you change it when you changed the pump? there is a lose connection somewhere in the fuel delivery system and it's pretty simply! i would check the fuel pump relay on the left hand side of the engine compartment and maybe even put power to the pump at the relay position "b" on the fuel pump relay harness and there should be a one pin connector to put power to also connected to the same position on the relay "b" the wire should be tan and white! good luck

Sep 18, 2009 | 1987 GMC Jimmy

2 Answers

1991 Geo Tracker only starts with starting fluid.


Check fuel filter on both vehicles...After that check fuel pressure ...Blocking off air flow to engine will change the fuel air mixture...air deprivation changes (lessens) air flow and fools engine into reading more fuel than is actually there. Mass air flow sensor should also be checked/cleaned if no results obtained by filter change if pressure is OK.

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1 Answer

1997 S10 pickup starts then shuts off in 2-4 seconds


when its in that not running stage or it dies you need to try and shoot a little starting fluid or gasoline into the throttle body or air cleaner and try and start it again .. If it starts then we know you have a fuel pump going out .. and its in the gas tank .. thanks Jerry and holler if you need more..

Feb 05, 2009 | 1998 Chevrolet S-10 Pickup

1 Answer

Hesitation, stalling like out of gas


Clogged Catalytic Converter. What happens is as you push down harder on the accelerator you force more gas into the system causing a slightly richer mixture and more exhaust flow is neccessary. The easiest way to look for a clogged cat is when it's dark out take it for a ride causing it perform it's problem look under the vehicle if the cat is literally glowing red hot you either have a clogged cat or an extremely rich fuel mixture.

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