Question about 2001 GMC Jimmy

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In morning dont start on the first but on the second it does 01 gmc jimmy

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On these trucks there are similar problems with all of them, we get it all the time, put better gas than 7-11 or race trac gas in it for a while let the system be cleaned, replace the fuel filter.
ethonol gas is tearing up the early 2000 cars and trucks the abs plastic manifold and plastic gaskets cant take it and they are starting to leak making it a nightmare to remedy the problem.

Posted on Sep 03, 2010

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The most likely cause of this is that the fuel pump pressure check valve is defective and allowing the fuel to bleed back to the fuel tank, then the system must purge before the engine starts, this usually takes a couple of cranking tries. The check valve is built into the fuel pump outlet port, so the pump must be replaced to correct this. to confirm this problem have a shop run run a fuel pressure bleed down test or buy a gage and do it yourself, the test port is on the top of the engine, it looks like a large tire fill valve

Posted on Sep 03, 2010

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Posted on Jan 02, 2017

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