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Troubleshooting the fuel pressure regulator - 1989 4.0


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Replaced some fuel lines today.  Upon reconnecting everything, I have a no start condition, with no fuel at the rail.  Everything stops at the fuel pressure regulator.  If I remove the FPR, and prime the pump, fuel shoots everywhere.  Replace the FPR (tested off of the rail and on the rail), I get nothing. 

Removing the hard line from the FPR results in, again, fuel spewing everywhere.

 

Are there troubleshooting options or is a new one simply needed?  If a new one is needed, what is recommended?  There just seems to be junk everywhere on Ebay.

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22 minutes ago, JMO413 said:

Not sure if I am reading your post correctly but I think you have the fuel lines reversed.

IMG_20210629_174657436.jpg.5294782a1a451e1eee7a3d1f77e89dfb.jpg

Pressure should come in the back of the rail and return out the regulator at the front.

 

I do.  I caught it just now.  Thanks for the help.  Embarrassment abound.

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So, to clear this up for future readers - took the FPR out of my parts jeep and it still didn't work. At that point, I retraced what I did and had the "doh!" moment.

Either way, all is good now. As always, thanks for the assistance.

Sent from my Pixel 4 XL using Tapatalk

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I do.  I caught it just now.  Thanks for the help.  Embarrassment abound.
You ain't the first or the last to do that. But I Bet you won't do it again.

89 Comanche
Eliminator
2wd
4.0L
5 speed PukeGoat
Factory Original


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