IVE PUT A NEW FUEL PUMP A NEW FUEL PUMP AND IAC ...

  • Tiny
  • Zcolehouse
  • 1998 Ford F-150
  • 150,000 miles

I've put a new fuel pump a new fuel pump and Iac on it but when I try to start the truck it try's to start but then pops loud out of the throttle body and shuts off what could be wrong with it?

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Friday, April 5th, 2013 AT 2:02 AM

3 Replies

  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

I am giving you a walk through diagnostic for your issue. You might have a bad fuel pressure regulator or the crankshaft timing pickup may be bad.
Look through this diagnostic and get back to me with any questions.

http://www.2carpros.com/articles/engine-backfires-while-running

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Friday, April 5th, 2013 AT 2:13 AM
  • Tiny
  • Zcolehouse
  • Member

Is it possible I have bad spark plug wires? Because I put a different spark plug in the one wire and tried to start it but the spark plug wasn't even sparking?

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Thursday, April 11th, 2013 AT 1:32 AM
  • Tiny
  • DrCranknWrench
  • Expert
  • 3,458 posts

Yes. If other plugs have spark the plug wire could be bad. If you have a multi-meter you can test the wire for continuity. If you get new plug wires it is worth getting good ones as the good ones have less resistance and get more energy to the plug for a hotter spark.

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Sunday, April 14th, 2013 AT 8:17 PM

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