Hi Guys,
I have a really strange issues with my car after it sat for a week. I have been fitting a new android head unit which all went well.
Now when I went to take it out tonight it started fine but within 5 mins of running at idle it started to missfire or at least drop revs once or twice. It then started to splutter like mad and cut out a few times. Tried to drive it down the street and it was hesitating like crazy and then a huge backfire. It's not driveable at all. I get no codes what so ever even after 30 mins of crappy running.
I did notice a few things though which might not be related:
1. When I opened the tank after running it for about 30 mins it hissed like a lot. There was either lots of pressure or vaccume in the tank. Is that normal after it's been running for a while?
2. The idle after a while increased to 800rpm instead 650rpm
3. I heard a weird squeak/squawking noise coming from the rear for about 10 secs in 2 secs interval when the car was idling. Very strange noise. Can only think it was coming from the tank. I have heard it before normally after start up when warm for example and always goes away after 1-2 mins.
4. Low pressure fuel is good but targeting 82 psi, I knows that's high but assume its just not adjusted yet after resetting the adaptations. The rail pressure looks normal at 600-800 psi. These pressures hold even when it's stumbling so assume fuel side is OK.
It's FBO 2007 335i with hybrids/meth injection/lpfp stage 1 upgrade. Just got a new map for the hybrids from wedge and the last time I had it out (7 days ago) was running like a champ. I was very happy until now :-(
Its got 100k on the clock and I have done loads of maintenance in the last 10k miles:
New NGK step cooler plugs
New coils
Normal oil leaks fixed
Oil changed a few times
PCV valve Rob Beck
Walnut blast
Rear o2s new
Vanos are the original ones but did an ISTA test recently are they were perfect.
Main o2s are original as well.
Any suggestions before I start replacing stuff at random? I read something about the evap being faulty? It ticks like crazy on the off but I read thats normal.
Thanks!
I have a really strange issues with my car after it sat for a week. I have been fitting a new android head unit which all went well.
Now when I went to take it out tonight it started fine but within 5 mins of running at idle it started to missfire or at least drop revs once or twice. It then started to splutter like mad and cut out a few times. Tried to drive it down the street and it was hesitating like crazy and then a huge backfire. It's not driveable at all. I get no codes what so ever even after 30 mins of crappy running.
I did notice a few things though which might not be related:
1. When I opened the tank after running it for about 30 mins it hissed like a lot. There was either lots of pressure or vaccume in the tank. Is that normal after it's been running for a while?
2. The idle after a while increased to 800rpm instead 650rpm
3. I heard a weird squeak/squawking noise coming from the rear for about 10 secs in 2 secs interval when the car was idling. Very strange noise. Can only think it was coming from the tank. I have heard it before normally after start up when warm for example and always goes away after 1-2 mins.
4. Low pressure fuel is good but targeting 82 psi, I knows that's high but assume its just not adjusted yet after resetting the adaptations. The rail pressure looks normal at 600-800 psi. These pressures hold even when it's stumbling so assume fuel side is OK.
It's FBO 2007 335i with hybrids/meth injection/lpfp stage 1 upgrade. Just got a new map for the hybrids from wedge and the last time I had it out (7 days ago) was running like a champ. I was very happy until now :-(
Its got 100k on the clock and I have done loads of maintenance in the last 10k miles:
New NGK step cooler plugs
New coils
Normal oil leaks fixed
Oil changed a few times
PCV valve Rob Beck
Walnut blast
Rear o2s new
Vanos are the original ones but did an ISTA test recently are they were perfect.
Main o2s are original as well.
Any suggestions before I start replacing stuff at random? I read something about the evap being faulty? It ticks like crazy on the off but I read thats normal.
Thanks!