Hi Fanatics
I have a problem on my 135i.
The car has a slight miss / stumble / hesitation on light throttle which happens usually in 6th gear (or drive) highway driving at low 2500 or so rpm. Somehow it happens more often on slight inclines. On all JB Maps.
The car doesn't throw any codes, which makes diagnosis difficult.
At WOT the car feels great, maybe it's masked with the power?
I initially assumed it was the plugs. Replaced plugs from g-drive but problem still persists.
Did logs as well and both fuel pump values are in acceptable range.
The car has backend flash and recently had a carbon clean.
The problem may have started after either one but cannot be certain.
I've done some internet research and seen that guys have had similar problems.
Some of the solutions offered:
1. Injector clean with BMW fuel system cleaner. Apparently carbon build up here??
2. Plugs
3. O rings or clamp from front turbo to cooler.
4. O2 sensors were mentioned but didn't resolve one guys problem.
I am thinking perhaps it could be 02 sensors since I am not getting the catless codes despite removing the cats, or is that just because of the Backend flash?
Please provide any insights or guidance on what the mostly likely culprit could be and what should I try.
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I have a problem on my 135i.
The car has a slight miss / stumble / hesitation on light throttle which happens usually in 6th gear (or drive) highway driving at low 2500 or so rpm. Somehow it happens more often on slight inclines. On all JB Maps.
The car doesn't throw any codes, which makes diagnosis difficult.
At WOT the car feels great, maybe it's masked with the power?
I initially assumed it was the plugs. Replaced plugs from g-drive but problem still persists.
Did logs as well and both fuel pump values are in acceptable range.
The car has backend flash and recently had a carbon clean.
The problem may have started after either one but cannot be certain.
I've done some internet research and seen that guys have had similar problems.
Some of the solutions offered:
1. Injector clean with BMW fuel system cleaner. Apparently carbon build up here??
2. Plugs
3. O rings or clamp from front turbo to cooler.
4. O2 sensors were mentioned but didn't resolve one guys problem.
I am thinking perhaps it could be 02 sensors since I am not getting the catless codes despite removing the cats, or is that just because of the Backend flash?
Please provide any insights or guidance on what the mostly likely culprit could be and what should I try.
Sent from my iPhone using Tapatalk - now Free