Old timer here. Nice to see the forum still here, but I'm sure most members/redlines are long gone. Mine is still alive (somewhat) and well. But I'm having a fueling issue at the moment that has crippled the redline and I'm running out of ideas on what else to diagnose. Just seeing if anyone has had similar issues or has any ideas. To start, I do have ZZP's BRFPS. I think this is probably one of the key factors to my problem and making this a bit more confusing for me to diagnose.
The problem: Low fuel pressure. Right now, it sits at roughly 20psi at idle (about half of what it should be). Normally it would sit at around 42psi at idle.
I'll try to make a long story short as best I can, but still try to give you the full details. My Redline is not driven around very often. I drive it only during the warmer weather and I put maybe about 200-300 miles on it a year now. This is the first year I've had this (or any) problem. I've haven't done any mods to it for about 5 years. A couple weeks ago, took it out for the first time after it was sitting over the winter. I was able to drive it around for a few miles, get some gas, and come back home with no problems. The next day, I started to pull out of my driveway, it started misfiring and popping like crazy if I gave it any gas. I had to lightly accelerate to get any speed. I came to a stop light and basically lost all power when I tried to move. I was barely able to inch my way across the road before it shut off completely. I could start it up again, but it just died a few seconds later. Ended up getting it towed back home. I don't think this was limp mode either, because limp mode from what I understand is supposed to still let you drive it at low RPMs.
Later that night, it started up and idled just fine. I've been doing this for the last couple of days and letting it sit for about 20 minutes and getting up to temp. No misfires, temps look fine, revving it is normal, but the fuel pressure is just sitting at about 20 psi on the BRFPS gauge. The only CEL that shows up is P0036 (which I've had for the last few years). However, the one thing I noticed is that when priming the fuel pump before starting the engine, I no longer hear the vacuum discharge from the open fitting on the evap canister. I thought the pump wasn't working correctly and swapped it out with a new one and still have the same issue. No vacuum sound and still sitting at 20psi. On a side note, I have a brand new evap, vent, and boost solenoids. I've checked all the vacuum hoses and everything is still hooked up properly. HPTuners is showing the vent solenoid as constantly closed and the boost solenoid control at a constant 100%.
Right now, the next step I think I'm going to take is check out the PCV since one of the vacuum lines to the BRFPS is hooked up to that. Aside from that, I'd just be throwing some haphazard repairs at it and hope it will fix the issue.
The problem: Low fuel pressure. Right now, it sits at roughly 20psi at idle (about half of what it should be). Normally it would sit at around 42psi at idle.
I'll try to make a long story short as best I can, but still try to give you the full details. My Redline is not driven around very often. I drive it only during the warmer weather and I put maybe about 200-300 miles on it a year now. This is the first year I've had this (or any) problem. I've haven't done any mods to it for about 5 years. A couple weeks ago, took it out for the first time after it was sitting over the winter. I was able to drive it around for a few miles, get some gas, and come back home with no problems. The next day, I started to pull out of my driveway, it started misfiring and popping like crazy if I gave it any gas. I had to lightly accelerate to get any speed. I came to a stop light and basically lost all power when I tried to move. I was barely able to inch my way across the road before it shut off completely. I could start it up again, but it just died a few seconds later. Ended up getting it towed back home. I don't think this was limp mode either, because limp mode from what I understand is supposed to still let you drive it at low RPMs.
Later that night, it started up and idled just fine. I've been doing this for the last couple of days and letting it sit for about 20 minutes and getting up to temp. No misfires, temps look fine, revving it is normal, but the fuel pressure is just sitting at about 20 psi on the BRFPS gauge. The only CEL that shows up is P0036 (which I've had for the last few years). However, the one thing I noticed is that when priming the fuel pump before starting the engine, I no longer hear the vacuum discharge from the open fitting on the evap canister. I thought the pump wasn't working correctly and swapped it out with a new one and still have the same issue. No vacuum sound and still sitting at 20psi. On a side note, I have a brand new evap, vent, and boost solenoids. I've checked all the vacuum hoses and everything is still hooked up properly. HPTuners is showing the vent solenoid as constantly closed and the boost solenoid control at a constant 100%.
Right now, the next step I think I'm going to take is check out the PCV since one of the vacuum lines to the BRFPS is hooked up to that. Aside from that, I'd just be throwing some haphazard repairs at it and hope it will fix the issue.
