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Old 05-13-2012, 10:17 AM   #1
mikehurl16
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Default Fuel Injectors not Firing 1999 SC2

The car died while driving. Acted like a fuel pump had stopped. Towed it home and tested fuel prssure at the fuel rail and it passes. I checked the fuse for the fuel injectors and it was blown. I replaced the fuse and we tried to restart the engine. As soon as we tried to start the car the new fuse blew. What is the best way to find the source of the short?

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Old 05-13-2012, 10:23 AM   #2
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Default Re: Fuel Injectors not Firing 1999 SC2

Keep this in mind: fuel injectors are ground-switched: they have power all the time, and transistors inside the PCM connect them to ground, momentarily, to complete the circuit and fire them.

The first thing I would check is the somewhat exposed wiring near the injectors: look for any obvious damage (shorts). If everything looks good, it may be worthwhile to check the injectors with an ohmmeter to make sure none of them are shorted, but this isn't very likely. They should be 10-14 ohms.

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Old 05-13-2012, 03:19 PM   #3
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Default Re: Fuel Injectors not Firing 1999 SC2

Inspect where the wires go in between the intake runners,sometimes they chafe there and cause a short.

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Old 05-13-2012, 03:35 PM   #4
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Default Re: Fuel Injectors not Firing 1999 SC2

Does the fuse blow when you turn the key to RUN or when you turn the key to START?

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