Sycostang67

Yeah, those are the ones. I’d really like to replace all my fuel lines as the blue stuff that came with the FASS looks like crap. I’m broke as hell right now though so it will have to wait. I will take a better look at the fittings though, I was supposed to the other day but had so much other stuff going on at the same time I totally forgot.

I have the metal push lock fittings. I didn’t see anything wet, but it has gotten better. It’s still not as good as it used to be but is starting and building pressure better.

I need to change the oil this weekend so I’ll crawl around underneath and see if I notice anything.

My sensor is mounted on the pump, but I imagine the line would still have to fill before any pressure was created. I do have a sensor closer to the VP but that had the Quad plugged into it which is no longer with us.

When I started my truck the first time with the new ECM the fuel pressure was at its normal range of 14-15psi. After I shut the truck off I replaced a wire on my switch box and accidentally knocked a wire from the fuel pump relay. When I started it again I noticed I had zero pressure. Thinking I could figure it out quickly, the truck ran out of fuel. Once it was sorted the truck obviously wouldn’t start. I loosened the fass filter and ran the pump until it gushed and then retightened. I then cracked 2 injectors and cranked until they bubbled out fuel. The truck runs but now it takes a a few extra seconds of cranking when cold to start and the fuel pressure gauge doesn’t read until a few seconds after it has started. My pressure is now at 18-19psi. The truck runs and drives fine, not sure what to do.

Mike if you lived closer I would kiss you. I had to remove the t-case boot to replace some wires and left it in neutral. 🤦‍♂️

Apparently this trip isn’t over. The truck runs but now it doesn’t move. When I put it in gear the rpms drop a bit but no movement. When I try to put it back in park it grinds. I have to shut truck off to get back in park.

Praise the 8lb 3oz. baby Jesus my truck lives!!! I reassembled everything, hooked the batteries up and did a TPS calibration and it fired right up like it was running yesterday. Not to proud to admit I shed a tear or two of joy. 🥳

Well the news isn’t good, after talking with the folks at GoECM they have confirmed the processor is bad in my ECM and is not repairable. Thankfully they are applying my repair cost towards the purchase of a new(reman) unit. I would assume this may be why the ACS repair didn’t work. I don’t know enough about these things to know if they would have been able to test this in depth. Their cost was much cheaper than GoECM so I’m not going to say anything negative about them. According to the info ACS sent me it sounds like they tested and repaired the parts I knew weren’t working. I’ll update again when I receive the new ECM and get it installed.

After some thinking and talking to the wife, I’ve decided to send the ecm to someone else. I think the problem with ACS may be that their repair is based solely on the information I give them. The shop that fixed my turbos recommended a place they use out of Texas. I called them today and they test and check the entire unit. Just found out today my daughter can’t take drivers ed for a few more months so I’m gonna use the money we saved for that to get it done.

Got my turbos reinstalled, unfortunately neither of the drain kits worked so there’s $200 down the drain. I did manage to get a nice fat 7/8” drain on the big one with parts I had purchased last year but wasn’t sure would work. I’ve gone through all the grounds and the harness and found nothing wrong. I guess I’ll call ACS on Monday and see if they want to try again with my ecm, otherwise it will cost a lot more to have someone else try and fix it.

More good news, just got my Quad module back from testing and it’s toast. There’s $800 I don’t have. I can’t wait to see how the truck runs on stock tuning with all the other mods if I ever get this ecm issue sorted out. My S475 is being rebuilt and they at least verified it was due to the drain hose not flowing well enough. The S357 they said was fine and needed nothing. That’s still $500 for the rebuild and $200 for new drain lines plus whatever having the ecm rebuilt a second time will run me. 🫣. The last 10 trouble free years of operation are all catching up to me.

Got both turbos removed today and will be taking them in to get resealed while I figure out new drain lines. While I was in there I cleaned all the grounds and inspected the harness on the passenger side of the engine compartment. They all looked good except the one on the PCM had a little touch of green on the wire so I will most likely replace that one. I’m also unplugging and plugging all the connections as well. Would it be a good idea to smear some dielectric grease on the grounds? I did check a few on the other side before I ran out of steam. I off work this week so I will get out there again later.

I did find one loose ground wire that was covered in crud, cleaned and tightened to no avail. I need to pull my big turbo off to get it resealed and remove my inter cooler and piping to clean them out so I may as well start that and get a better look at the rest of the harness while I’m at it.

They listed a ton of possible causes for failure to check. Basically every sensor on the truck, damage to the harness, TSB’s, faulty grounds, etc. The truck ran perfectly and has for the last ten years when I pulled into the garage so I had no clue what to even look at. I did check some of the harness and found one tiny hole in a wire possibly from a probe, it wasn’t close to touching anything but I wrapped it up anyway. If I have time this weekend I plan to go through the whole thing and check all the grounds and fuses.