I just got an 88 GMC Sierra that belonged to my.

NWARREN72

MEMBER
1988 GMC SIERRA
138,000 MILES

I just got an 88 gmc sierra that belonged to my grandpa. The truck has been sitting for over an year and hasn't been started or anything. I replaced the battery and the truck started right up and was running great until I put gas in it. I had driven it approximately 12 miles.

Truck was running fine until gas was put in it. Replaced fuel filter thinking that might be the problem but did not fix it.

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NWARREN72

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4 POSTS

This is the only vehicle that I have to drive at this time so any help you can give me soon will be appriciated.

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Thursday, November 24th, 2011 AT 12:21 AM

JACOBANDNICKOLAS

MECHANIC
109,758 POSTS

IS the fuel pump running?

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Thursday, November 24th, 2011 AT 12:23 AM

NWARREN72

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4 POSTS

Yes the fuel pump is running. The engine is getting gas but doesnt seem to be a sufficient amount.

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Thursday, November 24th, 2011 AT 12:30 AM

JACOBANDNICKOLAS

MECHANIC
109,758 POSTS

Okay, you need to check fuel pump pressure. You will need a gauge. Most parts stores will lend them to you or rent them. Go to our homepage under the DIY section. There are detailed directions and a video that shows you how to do it. To that and let me know what you find. There is a good chance you are correct. The new gas may have caused dirt to damage the pump.

LEt me know what you find and I'll check pressure specs. I think it needs to be around 50psi, but I need to confirm that.

Have a good Thanksgiving day if I don't hear from you till after.

Joe

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Thursday, November 24th, 2011 AT 12:46 AM

JACOBANDNICKOLAS