BrandonGST
Proven Member
- 64
- 17
- Aug 24, 2016
-
Columbia,
Missouri
So I will elaborate on the title a little. I was on a trip home from a car meet, highway cruising had no issues for 80 miles. All of a sudden I noticed the car bucking every so often, then out of nowhere started losing power, afr very lean around 17-20. Came to a stop and the car died. Tried to start it and when hitting the throttle, there's a second to two second delay before the car actually revs and shortly after starting it dies out even full throttle. Towed the car home an began diagnosis.
Quick rundown of the car:
Wiesco 8.5:1 pistons
Eagle rods
Eagle crank
manly valves
GSC everything else valvetrain
GSC S3 cams
Walbro 450
ID1000's
Speed density
DSMLink v3
Aeromotive FPR
The list continues but for sake of time reading I'll leave it at some of the most important items. Now things I've done to try and solve the issue. First I checked for spark, pulled the wires and plugs all plugs had spark. Flashlight in the cylinders #2 was dry the other 3 cylinders were wet. All plugs are looking the same nothing odd. So I assumed a clogged injector, removed the injectors cleaned all of them with my little setup and they all sprayed fantastic. Ohmed them out as well and got 12.3 on the 20 setting on my volt meter for ohms on all 4 injectors. Reinstalled the injectors, same problem car would start up and about 5 seconds later it would start lagging on throttle input, running lean and dying. Double checked fuel pressure and its right where it needs to be(I have fuel pressure set to be logged in the logs below). disconnected the feed line to make sure there's fuel at the rail and there is tons. I then checked compression, 152 across the board(100 miles on fresh motor), boost leak tested for the 100th time and found no leaks, checked the intercooler, every inch on piping, TB, biss, ISC, Turbo, Exhaust, everything and no leaks anywhere. I have had issues with my transistor plug coming loose so I checked that and no go. I also bought a second power transistor to test and make sure that wasn't the issue, same issue. Noticed my brake fluid cap was leaking onto my coil packs a little, I decided that the car is on the original coil packs, lets replace that. Ordered a brand new Mitsu coil pack off Extremepsi and got that in, no change. Changed spark plugs out for new ones just because, replaced the fuel filter, checked all wiring, checked mechanical timing, still in time. I decided this could be an ecu issue, so I sent the ecu to ECMTuning. I got a response to day and they said they don't see anything wrong with the ecu itself. They were thinking something in the settings not being compatible could be the cause, but on further inspection they said that the tune settings that myt car was running on when the problem occurred agree with the chip and should cause no problems. I'm kind of at a loss as to what this could be. I'm hoping someone else has experienced a similar issue and might be able to give me a little insight to what this could be. I will attach 2 logs. Log 2021.04.24-03 is the night the car started acting weird on the highway and quit running randomly, I started it and logged this while waiting for a tow. Log 2021.04.23-02 is from the day before logging for my tuner to dial in the car, no changes were made to the tune from the day before and I drove the car about 80 miles that day before this randomly happened. Any help is appreciated and if any more info is needed please just let me know!
Quick rundown of the car:
Wiesco 8.5:1 pistons
Eagle rods
Eagle crank
manly valves
GSC everything else valvetrain
GSC S3 cams
Walbro 450
ID1000's
Speed density
DSMLink v3
Aeromotive FPR
The list continues but for sake of time reading I'll leave it at some of the most important items. Now things I've done to try and solve the issue. First I checked for spark, pulled the wires and plugs all plugs had spark. Flashlight in the cylinders #2 was dry the other 3 cylinders were wet. All plugs are looking the same nothing odd. So I assumed a clogged injector, removed the injectors cleaned all of them with my little setup and they all sprayed fantastic. Ohmed them out as well and got 12.3 on the 20 setting on my volt meter for ohms on all 4 injectors. Reinstalled the injectors, same problem car would start up and about 5 seconds later it would start lagging on throttle input, running lean and dying. Double checked fuel pressure and its right where it needs to be(I have fuel pressure set to be logged in the logs below). disconnected the feed line to make sure there's fuel at the rail and there is tons. I then checked compression, 152 across the board(100 miles on fresh motor), boost leak tested for the 100th time and found no leaks, checked the intercooler, every inch on piping, TB, biss, ISC, Turbo, Exhaust, everything and no leaks anywhere. I have had issues with my transistor plug coming loose so I checked that and no go. I also bought a second power transistor to test and make sure that wasn't the issue, same issue. Noticed my brake fluid cap was leaking onto my coil packs a little, I decided that the car is on the original coil packs, lets replace that. Ordered a brand new Mitsu coil pack off Extremepsi and got that in, no change. Changed spark plugs out for new ones just because, replaced the fuel filter, checked all wiring, checked mechanical timing, still in time. I decided this could be an ecu issue, so I sent the ecu to ECMTuning. I got a response to day and they said they don't see anything wrong with the ecu itself. They were thinking something in the settings not being compatible could be the cause, but on further inspection they said that the tune settings that myt car was running on when the problem occurred agree with the chip and should cause no problems. I'm kind of at a loss as to what this could be. I'm hoping someone else has experienced a similar issue and might be able to give me a little insight to what this could be. I will attach 2 logs. Log 2021.04.24-03 is the night the car started acting weird on the highway and quit running randomly, I started it and logged this while waiting for a tow. Log 2021.04.23-02 is from the day before logging for my tuner to dial in the car, no changes were made to the tune from the day before and I drove the car about 80 miles that day before this randomly happened. Any help is appreciated and if any more info is needed please just let me know!