Question about 1991 Chevrolet C1500

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1991 chervy 350cid has spark, but no fuel delivery

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Replace the electric fuel pump and the connector to it at the gas tank, the pump is inside the fuel tank

Posted on Jul 02, 2009

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Can you here the fuel pump run?
if not its the fuel pump if so its the fuel pressure regulator

Posted on Jul 05, 2009

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1 Answer

I have gas and spark. Why won't it start?


Hi Barry:
If you've checked and you have hot blue spark at the plugs then it has to be fuel or timing. Let's assume you havent done anything to change the timing.
That leaves fuel delivery. Check that the injectors are being triggered. Could be you have a faulty cps.

Jul 18, 2015 | 1991 Mazda 626

1 Answer

Toyota soarer twin turbo 1991 model running rough any ideas as to what may be causing my car to play up like this?


Hi Chris:
I'd start with standard maintenance procedures:
- Air Filter
- Spark plugs
- Fuel delivery system clean.

Depending on milage and maintenance history, a 1991 engine will be starting to display signs of age. Valves, timing linkages, rings, etc. age creeps up on them. "Rough" is usually associated with mis-firing. That leads it spark and fuel as the primary check, and then compression as the secondary diagnostic that I would be looking at.

Hope this helps.

Jun 22, 2015 | Toyota Cars & Trucks

1 Answer

Engine valve timing


This is a simple engine to work on. Check for compression in the dead cylinder. If low or none, you found your problem....likely burnt exhaust valve.
If compression good, check injector for fuel spay or fuel delivery head for fuel delivery. With engine idling, crack each line nut at the fuel distributor and see if any fuel squirts out.

If so, check spark delivery by pulling lead to dead cylinder and install used/spare spark plug into plug lead. lay this against engine and run engine watching for spark at plug tip. Do not touch the plug or wire while engine running.

If no spark, check distributor cap for cracks inside. The electronics are primative on these so the above should get you close to the reason cylinder is not firing.

Apr 06, 2014 | 1985 Volkswagen Golf

2 Answers

Engine cranks but will not start. Spark plugs changed, HEI distributorless ignition unit tested good.where do I go from here?


Spray some starting fluid into the intake, and see if it shows signs of life. If it does, then you have a fuel delivery problem.

Now, a 1991... That's fuel injected, yes? Throttle body injection or port injection?

Jul 07, 2010 | 1991 Plymouth Grand Voyager

1 Answer

1991 Honda Civic Problems car started ok. at stop sign died will not start getting gas turns over fine.seems like no spark


whaddya mean seems like no spark. There's no such thing as "seems like no spark. There either is or isn't and it's easy to tell. remove spark plug lay against good ground and crank. you'll see it for crissse sake.

Not getting gas is a fuel delivery problem, fuse, pump, or relay.

On sunday pray for it. all the other days cuss it out.

Jan 02, 2010 | 1991 Honda Civic

1 Answer

Why does my car downshift on the freeway?


I don't know what a filter change or tranny flush has to do with you car starting or not. I don't see any corilation between the two. I would bet it's either an electrical problem, spark problem or a lack of fuel delivery.

Oct 15, 2009 | 1991 Toyota Celica

1 Answer

Engine was running fine and shut it off 5 min. Tried restart and engine cranks but won't fire. Dual tanks 1 new fuel pump.Switch tanks still no start, tried next day, runs fine???????


Step #1 in any automobile diagnosis is "Isolate the system"
Switching fuel tanks may have seemed like a good idea, but it did not definitively determine whether the the fuel is getting to the fuel rails, so you are no closer to eliminating the fuel devery system than you were when the engine died.
If it does it again, you should do the easiest things first.
Pull a spark plug wire and check to see that you have good spark reaching the spark plugs. Good spark will eliminate the entire spark control system.
Only if you have good spark should you suspect a "part-time " fuel system problem. The Fuel delivery system can be eliminated if actual fuel pressure is checked at the fuel rail. (although you could still have injectors not firing for one reason or another)
You are losing one of these systems. (spark or fuel) only once you have determined which one, can you continue diagnosis to pinpiont the failure.

Oct 10, 2009 | 1991 Ford F150

1 Answer

I was driving my Toyota Camry home and just lost power and car wouldn't start again.


Have you tried testing to see what's not present, as in spark or fuel not getting to engine? Does it start for a second when you spray WD-40 into the front of throttle body for a second or 2.? If it does fire up for a second or so, then you've got a fuel delivery problem.

Sep 13, 2009 | 1991 Toyota Camry

2 Answers

No fuel coming out of fuel injector, 1992 gmc 1 ton van


check fuel filter.
check volts at fuel pump with test light, replace fuel pump

Sep 08, 2009 | 1991 GMC G3500

1 Answer

Fuel delivery problem


The fuel pump relay is under the felt panel on the front passenger side, under the felt panel, under the glovebox. It is a white relay, 6 pin. When it is plugged in, you can stick a 12v test light on the heavy red wire, this should be 12v supplied by the smaller wire/fuse located by the battery under the hood of the car. If you have voltage from that wire, stick your test light into the backside of the red/yellow heavy wire. It should light the light while cranking the car over. Another tip. you need to make sure you have spark before the fuel system will work. If no spark, possible engine rpm speed sensor or power stage/amplifier.

Oct 07, 2008 | 1991 Volvo 240

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