Misfires on highway after work done

[MustangGuy23]

Hello, so I have been trying to solve this issue for the past 2 months. I had opg&crank sprocket, twin disc clutch lpx, and dss carbon fiber drive shaft put on, as soon as I got the car back starting the car became slower, 7 seconds for engine to turn on rather than like 3. I didn’t think much of it until I got p0316, then while driving on the highway my CEL flashed and instantly lost power, the car felt rough. I have freeze frames for P0300, P0302, and P0304. I have literally thrown parts at it and nothing has worked to fix this issue, I even got a new tune.
Here’s what I have done, new coil pack on cylinder 1&2, new spark plug on cylinder 1 only, new injectors on cylinder 1&2, fuel pump, CKP sensor. I have looked at the reluctor wheel/tone ring with an oscilloscope, looks normal. The only thing I saw that was weird was the oil and gunk around fuel injector ports on cylinder 1&2. Mode 6 tells me that cylinder 2 has 1393 misfires , cylinder 1 has 101, cylinder 4 has 150, cylinder 3 has 48, cylinder 5, 7, cylinder 6, 5, cylinder 7 and 8 have 18. One thing I haven’t done and I’m scared to do because of the results is compression testing it, but I find it extremely odd that after I got work done on the car, it started acting up, last time I took it back to the shop they said potentially a fuel pump issue. I will upload pics of the freeze frames and mode 6.
ANY HELP IS GREATLY APPRECIATED!!!

Sponsored

 

[Nobuemon]

Why didn't you take the car back to the shop where the work was done? If it started happening right after the shop did some work on the car then it's more likely than not they f-ed up somewhere and it's their job to fix it. Does the shop have good reputation?

 

[Zrussian13]

Did you do a crank relearn after the clutch install?

 

[MustangGuy23]

Why didn't you take the car back to the shop where the work was done? If it started happening right after the shop did some work on the car then it's more likely than not they f-ed up somewhere and it's their job to fix it. Does the shop have good reputation?

So I took it back and they charged me for the diag and said possible fuel pump, the shop is very reputable but it’s a good drive for me and this car is my daily so it’s hard to just leave it and not have a car to drive, I probably am going to take it back up there soon.

 

[MustangGuy23]

Did you do a crank relearn after the clutch install?

yes I did, still same issue.

 

[Nobuemon]

So I took it back and they charged me for the diag and said possible fuel pump, the shop is very reputable but it’s a good drive for me and this car is my daily so it’s hard to just leave it and not have a car to drive, I probably am going to take it back up there soon.

Not only did they charge you but they also aren’t 100% sure what’s wrong with the car…? I feel like they're trying to scam you or smth. Did they ever explain how something could happen to the fuel pump when they weren't even working anywhere near it? Helluva coincidence.

 

[SheepDog]

Broken IMRC flapper (if not deleted) or they F'd up the timing

 

[MustangGuy23]

Not only did they charge you but they also aren’t 100% sure what’s wrong with the car…? I feel like they're trying to scam you or smth. Did they ever explain how something could happen to the fuel pump when they weren't even working anywhere near it? Helluva coincidence.

Yeah they only said that because they thought the check valve on the fuel pump was going bad due to it taking a minute to turn over, funny thing is I replaced it just for the hell of it and it didn’t do anything but make me waste my money lol.

 

[MustangGuy23]

Broken IMRC flapper (if not deleted) or they F'd up the timing

IMRCs are locked out, everything on the timing aspect looks good on the datalog but I am definitely not a pro at pinpointing issues on datalogs so I Could be entirely wrong, although my tuner says it looks good

Sponsored