[hijack]

hi everybody,
i have a very weird problem - when i'm accelerating half-throttle, engine revs up smoothly till 2800, from 2800 to 2900 revs its kinda unsure and accelerates slower, after 2900 acceleration is smooth.
running stock jb4 program, but the same behavior on the 1, 2, and 4th maps.
i have only downpipes errors (catless car).

when i'm going full throttle, car pulls great, smoothly.
what can be the problem?

car: 2007 335i MT

thanks

[Continue5]

you're probably pulling timing or fuel trims are going wacky for that 100 rpm, logs? More details? Like e85, if so how much? What gear.. etc...

[hijack]

Originally Posted by Continue5

you're probably pulling timing or fuel trims are going wacky for that 100 rpm, logs? More details? Like e85, if so how much? What gear.. etc...

i should check logs with jb4 plugged in?
i'm running just a regular 91 us octane petrol.
it appears on every gear.

[Continue5]

Fuel trims should be ok then, but we still need to see logs. It could be anything spark plugs, injectors, guny valves... etc we need to see logs. Do a quick search and figure out how to log with the Jb4 and post it on here. Then someone (Not me) who knows how to analyze jb logs can chime in.

[hijack]

does this log make sense?

[hijack]

also you can download .csv with detailed log. probably it is more useful for professionals
http://racing.by/documents/335-logfile.csv

let me know if you can see any issue with my car
thank you!

[hijack]

anyone?