misfiring?

[jib136]

spark plugs have been changed and ive checked the coil packs.

if i run it at 0.8bar is runs fine. if i put it to 1.1bar it splutters on full boost sometimes.

what could cause this

 

[S15_SAM]

Has it been remapped to adjust the fueling?

 

[spoonman]

what fuel are you running and what kind of fuel pump have you got, also have you changed the fuel filter and cleaned the MAF

 

[meddler]

correct plugs and gaps?

 

[Auss15]

Tune, could be over fueling on higher boost

 

[jib136]

well it was mapped when lupix had it.

ive changed the plugs about 4weeks ago and checked the plugs yesterday.
its getting a new turbo and stuff fitted in 2 weeks along with greg pro tuner mapping it

shall i just leave it till then and see if its still doing it?

also my power fc hand controller has randomly turned off and wont turn on?

could that be anything to do with it?

 

[S15_SAM]

Sounds like a few gremlins in your systems. Would just drive is steady until its mapped, Greg will find out if and where there is a problem!

 

[spoonman]

being James old car, it will have everything it needs, as meddler said gap the new plugs, even if they are iridium's to 0.8mm also are the plugs heat 7 or colder?, then go and put some fresh 98 or higher octane fuel in and see it that helps on the higher boost

correct plugs and gaps?

 

[als_jordan]

still could be coil packs... I had the same symptoms and they were only failing when under load.. Mine was very slightly missing at 0.8'ish bar (hardly noticeable) but was much more apparent on higher boost

 

[jib136]

thanks for the advice its turns out it was 2 faulty coilpacks!!!

also my ecu light sometimes comes on when on full boost? rekon its because its needs a map due to a new actuator and mani?

 

[Auss15]

If the ECU light comes on it's more then likely high knock levels, best to take it easy till it's retuned