Question about 1997 Chevrolet Blazer

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1998 s-10 blazer, 240,000 mi now, fuel pump was replaced a long time ago. no fuel pressure at intake manifold. is there a electrical check like a fuse, already swapped relay with another 1. thanks, Tim

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Try testing the power in and out to the relay take out the relay and check what you have going on there if you got nothing you got other issues if you do have power at the relay then your pump is probly shot.

Posted on Oct 15, 2010

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The Vortec engines were notorious for those kind of problems. The problem will be under the upper-intake manifold, and the fuel injector assembly will either have a cracked plastic fuel line running out to one or more of the fuel injectors, or the fuel pressure regulator that is located on the end of the fuel injector assembly is faulty or it has detached from the fuel injector assembly. Either way the lower intake manifold will be flooded with fuel anytime that the fuel pump runs.

There were two types made, the first type had fuel lines that connected to the lower intake manifold, and then from the metal fittings the fuel line turns into plastic and runs inside the lower intake manifold and under the upper-intake manifold where it runs over to the fuel injector assembly, and this type can really flood out an engine when it becomes faulty.

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The upper-intake manifold is not that difficult to remove, and after you remove the upper-intake manifold then (replace the fuel lines to the fuel injector assembly if it is the second type) turn the ignition to the "Run" position and when the fuel pump runs you should see where the fuel is leaking/spraying from, and it will most likely be a large high pressure leak from a ruptured plastic fuel line.

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Help


Sounds like it needs a new fuel pump. Get a Fuel Pressure Gauge and check it make sure it up to the Specs,What I think is about 35 to 40 psi without looking in my book. Also you would want to make sure the fuel filter was changed, Your getting spark and fuel, But You stated your able to start it with starting fluid so I would say it must be a fuel pump problem.. I hope that help you out. If not get back to me and we can try some more trouble shooting. Take Care, Bear

Jun 11, 2008 | 1993 Chevrolet S-10 Blazer

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