Non Runner.
Veteran member
Joined: Mar 2007
Posts: 11,344
Likes: 1,163
From: Oak Ridge, TN
any access to live engine management data...fuel trims, mass air flow, fuel pressure? Have you tried any fuel additives like BG-44K through the system? Does it knock/ping when you're at that rpm range?
Junior Member
Joined: Mar 2013
Posts: 3
Likes: 0
From: Hungary
XKR 4.2 stalls
You can easily eliminate the pump as a possible culprit by unplugging it from the fuel pump modulator and applying 12 volts directly to the wires that go to the pump. That keeps the pump running continuously. Don't drive it like that, but run it long enough to verify that the problem isn't the pump. Another possibility could be the fuel pump modulator.
I have the same problem as described here - stalling/rough idle/hard to start - but with the difference that with 12V directly hooked up and continously running, the problem disappears.
New filter, new pump modulator, 2003 4.2 XKR
Any ideas?
Junior Member
Joined: Mar 2013
Posts: 3
Likes: 0
From: Hungary
OK, but how should i do that? I have read somewhere to check the
resistance between the feet of the regulator, or is there another way?
I have te P0191 code also.
resistance between the feet of the regulator, or is there another way?
I have te P0191 code also.
Thread Starter
|
Junior Member
Joined: Sep 2011
Posts: 25
Likes: 0
Correct Order
Hi Chaps,
The car is surging during power delivery. Max, do you have the old one you could take apart to confirm orientation of the spring?
The car is surging during power delivery. Max, do you have the old one you could take apart to confirm orientation of the spring?
Last edited by XKR; Dec 7, 2014 at 12:51 PM.
No problem man. I'd be happy to help. I still have the old pump assembly on my shelf in my shop. I just refamiliarized myself with the entire assembly so I'm ready to talk with you about it. I just sent you a private message with my phone number. Give me a call. By the way, I remember the little parts laying in the bottom of my tank just like we see in your pictures.... That's not something I'm looking forward to ever seeing again!
Thread
Thread Starter
Forum
Replies
Last Post
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)