HELP engine probs

[robdaniel]

need help please, cant get my se to run right.runs fine on tickover but when i get to 3000 rpm it misses/backfires. have checked and rechecked connectors/pipes etc but cant seem to find anything. anyone got any ideas or in the north east area who might be able to help. i have freescan but dont realy know what to look for. starting to get me down. thanks rob

[Simon350S]

Capture a logfile, post it on here and I'm sure someone would take a look for you.

Don't let it get you down dudes, the answer is in here somewhere

[Bibs]

Is your O₂ sensor working correctly? Could be a fuel issue with supply at higher RPM, is the fuel pump working correctly? HT leads ok?

As Simon said, a log file paints a nice picture, please upload it here.

[robdaniel]

it was a new o2 sensor last year wont have done 1500 miles since fitment so doubt it that. starting to think its a fueling problem, should you get fuel from the shrader valve with ign on or should it only let fuel out of valve when engine running. dont know if its me but the pump sounds more noisey tha normal. have attatched a couple of freescan logs if anybody knows what their looking for

fridays log.csv

lotus diagnostics.csv

[Simon350S]

Just bumping this, can anyone take a look for Robin? Lets try and get him a fix.

Neither have, or ever used freescan so can't really help myself.

[Bibs]

Your O2 sensor is showing that the engine is running lean as the engine speed is increasing, I'm guessing that your fuel pump is struggling either due to a fault, blocked filter or similar.

[robdaniel]

thanks bibs for taking the time to look at my freescan logs.. noticed reading a old post that mr.oogieboogie(peter philips) had a good used fuel pump. after contacting him he said i could have it FOC and he posted it as well. top bloke thanks. fit the new pump and hey presto its fixed. hope i can be of help and return the favor some day. big thank you Rob

[Simon350S]

Nice one Rob, glad you got her sorted!

Those pesky fuel pumps!