Problems After Installing Fuel Pump
#1
New Member
Thread Starter
Join Date: Jul 2020
Location: California
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Problems After Installing Fuel Pump
I recently installed a new Fuel Pump as my old one was going bad, I got the 255LP Walbro Fuel Pump, now after switching it out and starting it the car was fine as I first thought, but after I turned it on I had trouble getting it to start again, the Fuel Pump turns on I hear it prime, I even made the holes on the FPR and Syphon Jet bigger with measurements as some people on another post recommended. But stepping on the gas pedal doesn’t let my car to go past 2k RPMs if I slowly press the gas it raises up fine but stepping on the pedal hard it sort of flutters and doesn’t raise up any higher. I’m not sure what the issue could be or what I could do to fix it, I’ve already read countless posts and threads with the Walbro Pump Install but I haven’t seen anything that works for me, any help is greatly appreciated! The most recent code that read before clearing it was that I was running lean but nothing else was popping up.
After messing with it a little more the car starts up more often now and I confirmed that gas is shooting through the line on top so it may not be the pump something else
After messing with it a little more the car starts up more often now and I confirmed that gas is shooting through the line on top so it may not be the pump something else
Last edited by JuanGarzaro; 07-16-2020 at 06:18 PM.
#3
New Member
Thread Starter
Join Date: Jul 2020
Location: California
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Hmm.. you need a tune. Upgrading to a 255 and modifying the jet and regulator is adding more fuel. Your revs stopping at some point is probably your MAF table being completely off.
Are you running any forced induction? Or just replacing the fuel pump naturally aspirated?
Are you running any forced induction? Or just replacing the fuel pump naturally aspirated?
#7
New Member
Thread Starter
Join Date: Jul 2020
Location: California
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
The boring of the holes I mentioned was after it initially started acting up, and I haven’t seen anyone else having this issue either that’s why I’m not sure what it could be
Trending Topics
#8
New Member
Thread Starter
Join Date: Jul 2020
Location: California
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Video of the issue I’m having
I’ve been able to start the car more often than it doesn’t, you can hear the fuel pump priming, but you can see on start up it sounds weird and doesn’t go to the correct idle which for me is usually 500-750 until after a while and when stepping on the gas the rec limiter flutters how you see and when I tried gassing it the second time it just died. Just realized the video isn’t uploading not sure what to do to get it to upload. Also I took my car out to run it, it does accelerate but I have to step on the gas slightly as the speed increases if I step on it too much then it won’t accelerate and it will just rev
Last edited by JuanGarzaro; 07-18-2020 at 05:28 PM. Reason: Took the car out
#10
New Member
Thread Starter
Join Date: Jul 2020
Location: California
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Thrown Codes
I ordered a new grommet and O Ring for the fuel pump just to make sure that area is sealed thank you! And the car finally threw two codes P0171:Fuel System Lean B1 and P0300:Multiple Misfires Failure does that give any more of an indication of what could be the issue? I don’t think the MAF is bad because when I unplug it while running the RPM’s raise and it goes back to normal when it’s plugged in.
Thread
Thread Starter
Forum
Replies
Last Post