Engine/Transmission (1998.5 - 2002) Fuel pressure

[RRuggles]

Unfortunately I had the loss of my lift pump and injection pump. Now, with the new, I have a fuel pressure gage and an showing about 7-8 psi at idle. Haven't driven it at highway speeds yet. I'm wondering what normal pressure is and at what pressure trouble might again be brewing. Thanks in advance. Oh, 2001.

 

[NevadaBackroader]

Do you have the new in the tank lift pump? If so, this is normal. If you have the original engine mounted lift pump, you should have 15 psi at idle.

 

[RRuggles]

Don't know if it's engine mounted or in the tank. I'm guessing it might be engine mounted. I was told the old one is no longer manufactured but that a repair kit was installed that is supposed to eliminate the problem.

 

[mhenon]

It sounds like you have the in-tank pump module and the pressure you're seeing is correct for that pump.

Mike

 

[NevadaBackroader]

I agree with Mike. If you had the dealer do the work, you probably have the in tank pump. My in tank pump has worked fine for 37K miles. I had it installed with a new injector pump at the dealer. It will pull all the way down to 3 psi under a load uphill. Scary, I know, but it is working fine. I ran it hard for the last 20K miles under warranty trying to break it (if it was going to break) before the warranty was up.

 

[cArNiVaLwOrKeR]

How much did it set you back???

 

[Bob4x4]

How much did it set you back???

Joe the intank conversion pkg retails for about $400.



Bob

 

[MHoverson]

Is the fuel pressure gauge new? I just got threw chasing my tail for a few days thinking I had a fuel pressure problem when after much head scratching it turned out to be an air pocket in my fuel gauge isolator.

I had just installed a new FASS high pressure fuel pump and it wasn't reading anywhere near what it should have and I was sure it was something major. Luckily it wasn't.

I followed this procedure I found online and now it works like a charm.



http://www.piersdiesel.com/TechIsolator.htm



Hope this helps.