STARTER SPINNING VERY FAST,HOWEVER ENGINE WILL NOT FIRE OR START 1998 GMC 1500

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truck will not start, engine turns, but does not fire ... - CarGurus

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CarGurusAsked by Travis Jan 02, 2014 at 04:34 PM about the 1998 Chevrolet C/K 1500 Reg. ....But if you have spark then even newer motors will fire up with starting fluid. ... go back to the basics.what are the basics you say you said you got spark number one. check all your fuses in the cab.in the fuse box .... Used GMC Sierra 1500".

check that the battery is spinning the engine fast enough . A slow starter seldom starts a diesel.. Check for air in the fuel system and bleed any air out . Check that the glo-plugs are working. check that the stop solenoid is operational and allowing the pump to supply fuel. check for water in the fliters / blocked fuel filter.

Check your fuel pressure it should be 60-66 psi with switch on and engine off.

You need to have fault scan to identify what sensor triggered light. Reduced Engine power is telling you that it's in LIMP mode.

i have a 1993 suburban gmc 1500. when i put the key in an turn it nothing happen at all.befor the car stop running it use to act crazy like start up in run great but when u turn it off it dont start back up. u wll have to wait than it will start..can u tell me what that can be..

Needs a valve adjustment. I assume its EFI, eliminating the possibility of the carb.

Check battery voltage should be 12v. Have battery load tested. If good recharge, then with a voltmeter across battery terminals try to start engine. If battery voltage drops below 9.5v starter has failed.

INJECTOR MAYBE?

Starter drive not engaging fully . Sticky or worn, but don't think changing thermostat had anything to do with it. Try having starter drive inspected & lubed if possible , but you may end up with new starter.

Does the starter crank the engine over? Saying your truck won't start could mean that the starter spins be the engine won't fire. If the starter is not spinning is it at least clicking?