02 ZR2 S-10 wont start

Tiny
LOURIAS
  • MEMBER
  • 2002 CHEVROLET S-10
One night i went to start my truck and it had power to every thing like normal but when i went to start it all power cut out. I just drive 20 minutes before that. A buddy of mine jumped my truck and it started right up. I got to were i was going turned it off and a few minutes later i go to start it up but all the power cut out in it. I found out that my fuel relay went bad so i replaced it. i went to start it and it would just sat there rolling over but never started. Have any suggestions?


http://www.2carpros.com/forum/automotive_pictures/93236_Image006_2_1.jpg

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Wednesday, August 15th, 2007 AT 10:22 PM

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Tiny
RASMATAZ
  • MEMBER
Does it have a security guard/immobilizer/auto theft detterent device? Your truck probably thinks you're stealing it and giving you a hard time.

If this is not the case: Check for spark at the plugwire while cranking it over-do you have spark.
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Thursday, August 16th, 2007 AT 7:39 AM
Tiny
RASMATAZ
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I would start with checking battery connections at both ends. How can you say that your fuel pump relay went bad with such a total lack of supplied information. The fuel pump relay only primes the fuel system for 5 seconds when you first turn the key on or off. It is the oil pressure switch that runs the fuel pump when the engine is running. Even with a bad fuel pump relay, you could crank it over for 20 seconds and the oil pressure switch would kick in the fuel pump from just the battery cranking making the oil pressure switch.[/quote:aea2823df2]

Techman

Reading it tells me you know your fuel system circuitry in/out damn good explanation right on the benjamins.

The fuel pump relay only primes the fuel system for 5 seconds when you first turn the key on or off. It is the oil pressure switch that runs the fuel pump when the engine is running. Even with a bad fuel pump relay, you could crank it over for 20 seconds and the oil pressure switch would kick in the fuel pump from just the battery cranking making the oil pressure switch.

In an accident the oil sending unit will kill the fuel pump-No oil pressure the contact opens in it. Here's the prove


http://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_1.gif

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Sunday, August 19th, 2007 AT 12:21 AM

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