Starting Issue -- truck sits A LOT

laidout98 · Feb 24, 2017

I am having an issue with getting my 98 C1500 started. I am thinking it is probably the fuel is bad and that I might need to replace the fuel filter as well. The truck sits for extreme periods of time with out a fuel stabilizer. When I do crank it up, it turns over smoothly and occasionally it will fire up and then die.
Any comments to help shed light or direct me down a different path to fix my issue are appreciated!

C30454 · Feb 24, 2017

I would check fuel pressure under the conditions where you experience the problem.

Tom

Biggershaft96 · Feb 25, 2017

Will it start off of starting fluid? If so then it is a fuel related problem. First check to make sure you hear the fuel pump running. If that checks out go ahead and check the fuel pressure. I think 50-55 psi is the norm for these. While you have the tester hooked up use the check valve to check the volume. I was always told a quart in 20 seconds is where you should be. If all of those things turn out good report back and well go from there.

laidout98 · Feb 26, 2017

Will do @Biggershaft96, thanks!

skylark · Feb 26, 2017

Do a Google search for "octane over time". I believe that you will find your problem.

laidout98 · Feb 27, 2017

Is it possible to siphon the fuel out of the tank? I seem to remember there being a mesh style guard that would prevent an individual from siphoning fuel (I may have been thinking of a different vehicle though). If this is the case, if I do not want to drop the tank or pull the bed (which is a huge pain) is my only option to pull the fuel line at the fuel filter and cycle the ignition key to drain the tank?
Also, being that the fuel has sat for so long, is it in my best interest to drop the tank and clean it? Has anyone had experience and had results? If so, what was the process and items that you used to achieve the best results.
Thanks in advance for all the help folks! I am trying to get this garage queen to be road ready so I can enjoy it again!

wheelman · Mar 25, 2017

look in to tbi with key on.should be pumping gas-if you got gas-spraying good-check coil-electronic module-cap and rotor button..you got to have fire at the plug.take number one out.ground number one.to manifold.you got to have gas and fire..

Breakdown · Mar 25, 2017

It's a 98- spider injector not tbi wheelman. I'd say dirty fuel could be causing it. Our ethanol fuels today absorb water like crazy if you let it sit for more than a couple weeks without putting fresh fuel in. Shelf life on modern ethanol fuel is only about three weeks before they start having water issues in a non-sealed enviroment like a gas can or fuel tank. Dump some heat gas line water remover in the tank and fill it up with non-ethanol mid grade and see if it helps

laidout98 · Mar 27, 2017

@Breakdown -- I haven't ever heard of "heet gas line water remover". Have you used this method before and had a positive experience? Being that the truck has sat so long would you or anyone here recommend pulling the tank and cleaning or resealing the fuel tank? I have not done any research on cleaning or resealing a fuel tank so any advice would greatly be appreciated!

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Breakdown · Mar 27, 2017

Same stuff. I've used it before on my last truck when it sat for nine months when I was on deployment and it helped

Starting Issue -- truck sits A LOT

laidout98

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