Engine/Transmission (1998.5 - 2002) Product Engineering PE4100 installed

[Bill_L]

Scott,



This makes perfect sence to me.





Since this is a return style fuel system that sends unused fuel back to the tank this is normal.



The fuel being moved through the lines upto the injection pump and back slowly heats the fuel.



The warmer the fuel the easier it flows which will quiet the pump and slowly raise the pressure.



This is one of the reasons why I can not take my mustang on long trips. The tank is too small the the fuel would get heated more than it should by just cycling through the lines.



Forgive me if someone has already stated this information but I did not see it in any of the posts.



Bill

 

[cscott]

Another thought is the cold fuel being thicker would be more prone to cavitation which would give a lower pressure reading.



Just a wild guess.



Craig

 

[Herman8r]

weber fittings

Scott- I noticed that you mentioned "weber fittings" & "no banjos". I don't know what the weber fittings are. Do they replace the banjo fittings at the VP?

I have the carter lift pump in series with the stock lift pump & pushing about 22 psi while dirving. Seem to be too much pressure. Would you suggest bypassing the stock pump?



Also--does excess pressure put too much strain on the VP?



Thanks, Herman

 

[Bigsaint]

Herman, I think the jury is still out on the high pressure V. VP44 seals issue. I'm not a big fan of much over 16 at the inlet to the fuel filter, but it's hard to knock the guys running the pusher pump system. They are making ( as you know as a pusher user) 22+ psi's with no issues that I know of ( maybe hard starting for a few) and no failed VP44's. It wouldn't hurt your flow any to lose the banjo at the bottom of the fuel filter ( outlet) and the banjo at the inlet of the VP44. Swap them both out for -6AN Weber fittings, a short length of braided SS line and 2 hose ends ( 90 degree). That's a great place to start, do the rest when time permits.



For the rest... thanks again for the replies. There's no doubt in my mind as well that the pump likes the warmer fuel. Even after a short ten mile ride, the pump is more quite and the psi's slightly more consistent. Just hope I'm done with those 25 psi spikes :--) , they are a little scarey for me .



Scott W.

 

[Herman8r]

vp44

Thanks for the info Scott. Regarding to hard starts. I think I just fell victum to a mis-diagnosed vp44 by the Bosch tech at the local Bosch service center. The problem started back a few months ago. DC said the Banks sys. was the reason for hard start (& BTW--sorry about the wire tap-will not warranty the vp44). This went off & on for a while until I decided to have the Bosch Dealer test the system. He said the same thing "Banks does this to the pumps. They replaced the VP44. The problem of hard starts still happens on occasion. I have to say " I take responsibilty for my upgrades" I will have to go back to Bosch & discuss the issue so others will not fall into the same situation.

I am also going to ask the Bosch Rep to send the pump (or I will) to a facility that can analize the original pump as this service center does not have the "tooling" to do so.



While reading the latest TDR issue I realized that excess fuel psi may =hard start.



I feel that Banks may be getting a bad rap due to some of our own modifications--this includes some of my own doubts.



Thanks for all the reports on the lift pumps. The photos are great!!



Sorry for the long posts.



PS-- Does anyone know the process for retrieving "codes" by doing the "turn key off & on method? I tried but no luck. (check engine light is on)

 

[Bigsaint]

Here's the trick to get the codes... 1st, stand outside of your truck and yell " I love the smell of diesel in the morning" 5 times... .



okay, just kidding. .



cycle the key on/off(without starting) 3 times, on the last key on, leave it on and read the codes off the od.



Scott W.

 

[Bigsaint]

Oops, just saw you have a '99, won't work. You need a scanner to get the codes.



Scott W.

 

[Herman8r]

codes

Scott--Thanks--I thought that might be the case.



Regarding the uncontrollable display of aminalistic behavior--jumping up & down while beating my chest with my nose sucking the rich aroma of diesel exhaust (commando style) well--let's just leave it at that :--)



Herman

 

[Bigsaint]