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Repair guides and support for cars, trucks, and SUVs manufactured by GMC.

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1994 jimmy won't start, getting fuel

1994 jimmy won't start, checked plugs,pump, filter, relay????

Update (04/19/2022)

4.3. 6cyl. 4wd. Auto. No turbo

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Heidi Edgmon what engine size is this? Do you have spark? does the engine crank over? did this just happen all off a sudden ro anything that preceded this? What and how did you check things out?

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Yes spark, yes on crank, ...no slowly ... Replaced fuel pump, checked relay... Spray starter into intake, start them die...

Diagnostic read CODE 5-4, fuel pump ...less than 2 volts???

Bench tested old pump ...worked...???

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Heidi Edgmon your Code 5-4 is the code for Fuel Pump Circuit Voltage Low which would explain your voltage being at 2V. I would start by trying to direct to wire the pump to a 12V line to see if it runs. After that I suggest you check the wiring for a possible bad connector/broken cable/poor ground.

Take a look on here for the fuel pump wiring test. Let us know what you find out.

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Ok let you know

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Heidi Edgmon crwdns2934231:0crwdne2934231:0
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