Been doing some searching on the stock FPR as I'm about to install a new FDP along cleaned injectors with new orings as part of a maintenance cycle (along with a long list of items!). I was thinking it might be a good idea just to change the FPR at the same time since it is already out. I really don't want to remove the rails a second time in case it ever leaks. Have not found any thread talking about the FPR in the same way as the FPD so maybe changing it would be overkill and it best to leave it alone. For the most part my car is stock. Just looking for opinions before I reassemble.

Thanks!

 

ive never heard of the fpr giving problems like that. it wouldnt hurt to replace the oring on it if youre right there. also replace the screws with allen head bolts. no need to reinstall what could potentially be a vice grip situation. those screws dont always come out easy. it would be better if you deleted the fpd though. even on a stock car, you would benefit from one less item in the bay

 

If the regulator fails, which is very rare, it doesn't create the same fire hazard that the damper does. Regulator diaphram would fail and fuel will get pushed into manifold pressure source on lower intake.

Car will either run really badly with that much fuel or not at all and will flood.

should be fine to reuse if it wasn't having any of those issues prior issues. But once you take it off yes you would need a new oring for sure at this point they are rock hard but should remain sealed as long as you dont remove it from the rail.

 

Thanks for the feedback. Since there are no issues with it I'll just put it back. Changing the oring and those screws is a good idea (every oring that I have checked so far is done!). I do however have an extra primary fuel rail that I'm going to set up to delete the FPD. I'm still undecided and will do some more reading before making up my mind. There's a ton of info on this subject so I don't want to bring it up in this thread. Wish it was easier to swap back and forth to compare

 

I'm not a fan of removing the pulsation dampener. Big thing is it helps quiet a harmonic that can cause a lean spot at certain loads and RPM's. Someone recently went nuts trying to figure out why a car with a full aftermarket fuel setup had an odd lean spot that couldn't be tuned out, put a pulsation dampener in and problem solved.

Get a new one, install it, worry about it in 20 years. It's not worth trying to remove something that's not in the way, heavy, or robbing you of power. They are also still available and not too pricey.

Dale

 

So...

I finally pulled out the rails and found a mangled primary injector grommet. I was suspecting a small fuel leak so this may have been the culprit. My guess this may have been done years ago as part of a recall... I was planning to change the grommets anyways but will be much more careful than my predecessor to drop it back in.



On another note I can see a bit of dirt that has fallen in the injector holes after removing them. I'm definitely going to leave the diffusers alone and just wanted to ask if it safe to vacuum the dirt the the holes without disturbing the diffusers. They seem too be wedged in there tight but just wanted to double check.

Also I'm going to get a new FPD and orings for all the other connections. As Dale mentioned it should be good for long time (probably will outlive the current and next engine!).

Thanks!

 

Don't touch the diffusers if you don't have to.

Yeah either vacuum out or blow out that dirt.

Messed up or missing diffusers can result in a fuel smell or high idle. Good that you found it!

Dale