1993 Dodge Dakota Won't start when eng at op temp

Tiny
STEVE7754
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  • 1993 DODGE DAKOTA
Electrical problem
1993 Dodge Dakota 6 cyl Four Wheel Drive Manual

will not start when warm the fuel pump does not wizz nor do you hear the relay click. Starts fine when cold you hear the fuel pump wizz and the relay click. I replaced both fuel pump relay and the auto stop relay regrounded everything still will not start till eng cools down takes between 10min and 1 hr befor it will restart depending on outside temp
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Sunday, May 2nd, 2010 AT 12:44 PM

4 Replies

Tiny
INTERNETMECHANIC
  • MEMBER
Hi, when the problem occurs, did you do any basic testing? Have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. You have to do testing when the problem is ongoing. Also, check for possible mil codes. You should be able to check mil codes by cycling the ignition switch. You just turn the key till the dash lites come on, no further. Cycle the key on--off, on--off, on, then the mil starts flashing, you count the flashes to get the codes, your looking for two digit codes.

Some of the national brand autostores used to loan out a fuel pressure gage if you don't have one. To visually test for spark at the plugs, you can pull a plug wire loose, stick known good plug or spark tester in the boot, ground metal part of plug/tester to metal part of engine, engine cranking, watch for spark.

Those relays you mentioned, we can check the wiring circuits if you want?


http://www.2carpros.com/forum/automotive_pictures/512072_dakota_fuel_pump_relay_1.jpg

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Sunday, May 2nd, 2010 AT 1:17 PM
Tiny
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Spark is not the problem, if you spray eather or gas in intake it will run on it. The problem is fuel pump will not kick in when hot.
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Sunday, May 2nd, 2010 AT 2:37 PM
Tiny
INTERNETMECHANIC
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With engine cranking, check fuel pump wiring connector at the rear. Dark green wire with black tracer is voltage for the pump, black wire is ground. If you have good voltage and ground at the pump when the problem occurs, and no pump action, suspect the pump.
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Sunday, May 2nd, 2010 AT 4:08 PM
Tiny
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Don't think its the pump as it will run fine if you jump it with hot wire. But thanks anyway.
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Sunday, May 2nd, 2010 AT 5:50 PM

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