what pressure reading should there be on a 1989 f150 high pressure fuel pump.

Asked by Jun 20, 2010 at 03:50 PM about the 1989 Ford F-150

Question type: Maintenance & Repair

What direct pressure readings should i be getting on a high pressure fuel pump (rail mounted)?  I am reading 17 psi.

What should the pressure reading be when hooked  up to the schrader valve on the fuel line just behing the engine up close to the firewall?  I read 10 psi

Are these within spec's for1989 F150 4.9 L EFI high pressure fuel pump?.

3 Answers

55

You should have 45-60 psi at the rail with engine running.

4 of 4 people found this helpful.

yes you are withen spec,s,if you are getting to much or not enought fuel,put a fuel regulator on it,you will be able to adjust the fuel pressure.

1 of 1 people found this helpful.
85

that sounds kinda low. i have an 05 f150 and my fuel rail pressure is at 40psi. but mine is the 5.4 triton. but that dose seem low.

3 of 3 people found this helpful.

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