Question about 1991 GMC K1500

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1991 sierra 4wd 2500 pu replaced inline filter, and fuel pump

The engine fired up and was dependable the rest of that day.this morning, it would turn over, but no fuel to throttle body. thank you.stranded again

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Fuel pump

Posted on Nov 27, 2008

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Vehicle will not start. It will turn over. Power is good. It did this once before a couple weeks ago. The next morning it cranked right up. What do you think?


It takes three things for a gas combustion engine to start and operate---air, fuel and fire---air is usually okay, fire sounds okay, according to you having "power", and the fact that it is intermittent---but still, check for spark---have someone wearing insulated gloves, unless they don't mind small pulses of 12VDC at about 50mA, which is not that bad, and have them hold a spark plug while still plugged into the wire very close to, but not touching, chassis ground. Or, put the spark plug while in the plug wire in a dark area, like down into the engine somewhere, and look for a spark. Either way, if your buddy feels a pulse or sees a spark, then you have fire. If not, it would likely be either the ignition module, usually in the distributor housing (under the rotor), or the ignition coil---you can obtain a schematic and check voltages if you wish---more often than not, in Chevys, it is the ignition module.

If you have fire, then it would be fuel related...depending on the delivery system (fuel pump, electrical or mechanical, or injection)---for an intermittent problem like this, it is likely electrical for fuel delivery, so not a carburetor or mechanical fuel pump---I would bet you have either tuned-port or throttle body injection---throttle body injection is one big port, like 1/2 carb, 1/2 fuel injector. If you have fuel rail injectors, then either they're all bad, or the ECM that controls them is dead (very unlikely)---my guess, if you have fire, is the fuel pump. However, I did have a Chevy Corsica with a bad injector (throttle body), which had the same symptoms.

Aug 23, 2011 | Chevrolet Tahoe Cars & Trucks

1 Answer

I try starting my car this morning and the key would turn but it didn't start, the lights went on, the radio and windows all worked, after a couple of times turning the key, it started. After I start...


clean all the battery terminals, ( you don't say if it turns over and just doesn't fire up ) so check the cables first ,, you could have a number of things happening if it turns over and just doesn't fire, your fuel pump could be losing pressure during the night from bleed off, if thats the case replace it, change the filter, ( fuel) open the distributor cap and check the rotor and spark plug pins inside the cap, remove any build up on it,, a harder fix , remove the air system to the throttle body , and spray carb cleaner into those ports,, there is a sensor located in there, Its just a little bump , but use extreme care when cleaning that , wipe it off with a soft clean rag ,, that should correct your starting problems, how do I know this? I just did it to my 95 camry that had the same issues, I did the throttle body clean , and replaced my fuel pump and filter, starts like it was new, and it has 297k plus on it !!

Jul 25, 2011 | 1993 Toyota Camry V6

1 Answer

Truck will crank but not fire up. The problem started about two weeks ago. It would crank and crank but not turn over right away. Eventually it fired up after maybe 8-12 tries. Over the last several...


I think you may be on the right track with the fuel pump idea. Check your fuel pressure - it could be the pump or just the fiter screen in the tank. You don.t say what kind or year of truck you have - I am guessing the pump is in the tank. (Although you do mention a throttle body / fuel injector)

Dec 14, 2010 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

2003 GMC Sierra 5.3L (has 2004 engine) Drive by wire. Reduced engine power (Limp Mode). Following error codes - P1516, P2135, P0120. Checked all connections at throttle body(Wiggle tested the individual...


CODE PO120 - TP SENSOR 1 SIGNAL RANGE PERFORMANCE. CODE P1516 - TAC MODULE THROTTLE ACTUATOR POSITION PERFORMANCE. CODE P2135 - THROTTLE POSITION SENSOR 1 - 2 CORRELATION ERROR. THIS IS A DEALERSHIP FIX YOU HAVE PROBLEMS OR FAULTS IN THE THROTTLE POSITION SENSOR.

Oct 24, 2010 | 2004 GMC Sierra 1500 Crew Cab

1 Answer

Morning or when engine cools down I have to run it for about 15min then it stop dead. wait for 5-10 mins, turn it on and runs again for 2-5 mins than stop again. wait for few more mins and on again, It...


dear sir
this can be problem cause of o2 sensor(lamda sensor) . in cold condition if we start the car some quantity of water can also came out through silencer and can stay at point of 02 sensor it is paced at silencer, ECU(Engine Control Unit) receive data from 02 sensor for Engine Firing . so replace it and let me know. thanks.

Sep 13, 2010 | 1997 Jeep Grand Cherokee

1 Answer

'99 silverado will turn over but won't start. I have a new battery, 6 month old starter, new plugs, new distributor cap and rotary button. I used to be able to turn the ignition on and off real quick and...


I'd start with one of these and move on to the next.

Fuel
Spark.

Is it getting fuel? You should have an "in tank" electric fuel pump. When you turn the key halfway (just before turning the engine/starter over), you should hear the fuel pump prime. Easy way to check is to look in the throttle body while someone turns the key to the "on" position. You should see/smell the fuel. You can also listen to the gas tank while the key gets turned. You should hear the fuel pump run.

To check spark, pull a spark plug out, put it back on the plug wire and rest the electrode end of the plug up against the engine or exhaust manifold and have someone turn the engine over. You should see the spark plug firing. Don't hold the plug or wire while doing this. You'll get zapped if it's working ok.

If these both check out ok, then take a look at your firing order. If it's off by a significant amount, it may not fire. I've seen this happen when a cap/rotor/wires were changed and the wire/rotor was not positioned on the correct cylinder. (Most of the time they will at least fire or backfire, but either not stay running or run REALLY badly if the firing order is off.

Jan 18, 2010 | 1999 Chevrolet Silverado 1500

2 Answers

2001 dodge 5.9 diesel Cranks for 20 to 30 sec to start in morning


You have fuel runback.Replace the injector leak off pipes then try.If this does not work then have a non return valve fitted to your fuel supply pipe close as possible to the punp.Hope that was helpfull good luck.

Aug 01, 2009 | 2001 Dodge Ram 2500 Truck

1 Answer

Hard starts in the morning even though replaced most parts


Check the power to the cold start injector. (it's only going to have fire for a few sec. after the key is turned on). If the fire is good, replace the cold start injector. This injector is activated for a few seconds when the engen temp is low to add a little fuel lower down in the intake and closer to the pistons.

May 20, 2009 | 1994 GMC Jimmy

2 Answers

My 1995 Taurus wont fire in the morning


I agree i would change the fuel filter first its the least exspensive and can only do the car good anyways

Let us know how you get on

Regards
Steve

Dec 11, 2008 | 1995 Ford Taurus

1 Answer

2002 ford taurus won't start at first crank in the morning


remove the air filter housing from the throttle body, or if its mult-ported injection, remove the large air duct. Do this the night before. The next day, before cranking and having a spray can of carb. cleaner, spray a couple of shots of carb cleaner either into the large air duct, spray towards the engine, or if its single body injection, spray directly on to the throttle body.

Crank engine immediately, preferrably have some one else sitting in the car to start it after you spray.

If the car even tries to start, replace cold start relay.

Nov 22, 2008 | 2003 Ford Taurus

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