Join Date: Sep 2010
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These were my results:
- The pressure when up to about 10 psi on the first time we switched key to run.
- When the pressure began to fall (after 3 seconds) we turned key to off and then run again, it would jump another 13 psi or so.
- Now the combined psi from 1st and 2nd time were up to about 23 psi. We turned it off again and back to run and another increase of 16 psi. Now there is about 39 psi. We this this 5 times before we got a combined pressure of about 55 psi which is right around where the pressure should be.
- We then cranked the engine and it started fine because obviously there was enough pressure in the lines but it took cycling on and off 5 times before we got the pressure up to the required.
- When we turned off the engine the pressure dropped from 55 to about 5 psi in a matter of 5-7 seconds.
- Once it was at 5 psi, we tried cranking it and wouldn't start unless we cranked it a second time (or we cycled the key on and off 3-5 times)
From my testing what would you conclude. What is at fault? Is it my relay, fuel pump, fuel pressure regulator, or sending unit?
Thanks a lot for your help
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