No fuel getting to throttle body

Tiny
KATSFIVE
  • 1989 DODGE RAM
  • 109,000 MILES

No fuel is getting to the throttle body, the fuel pump is working. Tested the fuel pump relay, ohms are low. Wanted to know if I can bypass the asd for testing and what am I missing here, What could cause the problem?

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Tuesday, May 21st, 2013 AT 1:42 PM

7 Replies

Tiny
HMAC300
  • EXPERT
  • 47,506 POSTS

Just replace the asd with a like relay test PRESSURE of fuel not whether it is getting there or not. TBI it should 13.5-15.5 psi if mpfi it should be 46-50 psi

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Wednesday, May 22nd, 2013 AT 8:01 AM
Tiny
KATSFIVE
  • MEMBER

How do I test the pressure? That is something I have never done.

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Wednesday, May 22nd, 2013 AT 2:02 PM
Tiny
HMAC300
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  • 47,506 POSTS

You need a gauge to do it it also may require adapters as well a lot of auto parts store rent them.

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Wednesday, May 22nd, 2013 AT 3:17 PM
Tiny
KATSFIVE
  • MEMBER

Replaced the asd relay, pressure is good, still no fuel. I can spray starter fluid in there and it fires right up. Could there be a problem with the gas lines or possible the injectors?

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Tuesday, June 4th, 2013 AT 11:31 AM
Tiny
HMAC300
  • EXPERT
  • 47,506 POSTS

If pressure is good what is it? If it's not 13.5- 15.5 psi then its' not ok, is the vacuum hooked up to pressure regulator? Are there any codes?

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Tuesday, June 4th, 2013 AT 12:02 PM
Tiny
KATSFIVE
  • MEMBER

Pressure is 15 psi. Vacuum is hooked up and I have no way of checking for codes.

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Tuesday, June 4th, 2013 AT 12:34 PM
Tiny
HMAC300
  • EXPERT
  • 47,506 POSTS

Check crank sensor for resistance it could also be the ecm or the crank sensor connector. We have not specson resistance so check against a known good one.

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Tuesday, June 4th, 2013 AT 12:43 PM

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