Question about 1995 GMC Suburban

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Won't start when hot

When the car gets hot it won't start, after an hour goes by it fires up no problems. I have replaced the plugs, distributer, fuel filter, fuel pump don't know what next?

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  • revsheets Nov 10, 2008

    I have a 94 GMC Suburban 2500 that will start fine when cool, but won't start when it's hot.

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Have you tried a new crankshaft sensor, not sure what engine you have,some are on front side and some are on rear. might check parts book ,

Posted on Jul 29, 2008

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98 jeep put new crank sensor ' coil pickup' and coil ' i have no power to the fuse block on finder no fire to plugs and dont here fuel pump


No power to fuse block? This may be the problem. Check all your maxi fuses in the power distribution block. I think all the maxi fuses are hot at all times-check if they are getting power, and fuses are good.

Also in the power distribution center is fuse F15- a 30amp fuse for fuel pump relay, and fuse F6- a 15amp fuse, also for the fuel pump wiring. Check that both are good, and have power-F15 is hot at all times. F6 is hot in run or start.
This is the 4.0L inline 6, right? That is the engine diagram I have. The coil signal is from the ECU. Does the check engine light come on with key on, so you know the ECU is powered?

Dec 09, 2013 | 1998 Jeep Cherokee

1 Answer

Why does my 1985 ford ranger keeps dying or stalling out


Based on your info you should be able to duplicate the problem on demand.
When the engine won't start, you need to figure out if it is fuel or ignition related to proceed.
Check to see if the plugs are firing, and if not check the coil, and see if the carb has fuel in it.
Ford products built in the 1980s had problems with the ignition module mounted on the side of the distributor but you may have replaced it already.

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2000 lincoln ls want start. replace fuel pump and fuel pump relay.


have you checked the fuel pressure regulater or the map sensor

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I have a rodeo/isuzu 4ze1-a recently replaced the MAF sensor and ended up with no spark.. Power to coil and out but no power to distributer.. Replaced distributer and still no luck... All relays and fuses...


you said your not getting spark..... double check that all of your plug wires are firmly attached ... you could possibly have a bad coil pack .

Feb 11, 2012 | 1995 Isuzu Rodeo

1 Answer

Cranks and then goes dead


First check your fuel pressure it should be 41-47 psi with key on and engine off if its below 32 psi replace the fuel pump and filter.If fuel pump checks out to be good then take ignition switch out and check for burned ignition switch wires and worn ignition key tumblers and ignition lock cylinder.These cars are known for faulty ignition switches and ignition lock cylinders.Ignition switch gets to hot then it won't start until it cools off.

Dec 30, 2011 | 1996 Pontiac Grand Am

1 Answer

What will make the truck not start up but its getting fire, it wants 2 start but not turn over


Three systems in engines:

Fuel delivery (fuel mixing with air to burn and making it to the spark plugs)

Ignition (lighting the fuel on fire)

Compression Building up pressure to fire the fuel
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It is possible your engine could have low compression if it has ever been run low on coolant or oil. The engine might spin or turn over but not have fire at the spark plugs. If you are correct that the spark plugs have fire but it will not "kick" or run then fuel delivery is where I would start. See if your fuel rail has fuel in it by pressing the fuel rail valve:
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If you have fuel there under a good amount of pressure see if one of the plugs smells like gas after cranking. If so the problem is not the fuel, move on.
If you don't have fuel at the Schrader valve the problem is in the fuel pump and system.
refer to a manual on how to remove the pump from the tank and replace it. This problem has signs before it goes bad. Hard starts and running rough when hot.

Good luck
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2 Answers

Turns over but won't fire the motor.Getting gas,new coil,new distributer,still won,t fire.o


Did you do a tune up on the vechicle? Does it sound like it wants to start? It could be the spark plugs.

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1997 Vauxhall Corsa - turns over but does not start when warm


It sounds like the pickup coil in the distributor, when it gets hot, it goes open circuit. Changing the plugs won,t help

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Car sometimes takes a long time to start


when a car's engine is heat-soaked from driving it can be harder to start. your spark plugs probably need to be replaced or at least re-gapped. when spark plugs age the gap gets larger and this can make the engine harder to start under these circumstances.

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make sure that the right cap goes to the right plug. they are specific to firing order.

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