slight misfire

mk5coz · Post by **mk5coz** » Sun Aug 12, 2007 10:51 pm

right guys i need help i have an intermitent misfire under accelaration not on tick over and not all the time. here is wot has been changed to try and find the problem plugs bosch super 4s, new leads vw ones, fuel filter vw, cleaned throttle body out, checked for loose pipes etc. also no fault codes found on vag com. so has anyone got any new ideas or similar experiences any little help will be great.

tegwin · Post by **tegwin** » Sun Aug 12, 2007 11:04 pm

It could be anything without you being more descriptive....

Could be the nock sensor playing up, a faulty throttle valve, blocked injectors...Or a whole host of other things..

garnier · Post by **garnier** » Mon Aug 13, 2007 8:02 am

Sounds a bit weird considering you changed the plugs and leads. Faulty ignition coil/distributor?

womble68 · Post by **womble68** » Mon Aug 13, 2007 8:59 am

Admittedly this was on a 1L Polo, but there is the same sensor on the top of the block on a GTI. We changed this after similar symptoms on my Girlfriend's car and it solved the problem. Its the sensor literally on top of the block.

polo_gti21 · Post by **polo_gti21** » Mon Aug 13, 2007 10:45 am

i had this problem when i first got the car i changed th HT leads and it was gone. try the sensors mate.

mk5coz · Post by **mk5coz** » Mon Aug 13, 2007 1:52 pm

polo_gti21 wrote:i had this problem when i first got the car i changed th HT leads and it was gone. try the sensors mate.

which sensor is it there are 2 on the gti engine a big one and a littler one.

1 GTI · Post by **1 GTI** » Tue Aug 14, 2007 5:59 pm

I have this trouble now and again with my GTI. It's only very slight but noticeable. I put my foot down the other day on the dual and the car seemed to pull back a little bit, thought it was very strange. Plugged VAG-COM but no faults found. Also sometimes I think my car misfires a tiny bit, not all the time though. what can that be? I've changed plugs and HT leads, VW leads and super bosch 4's plugs.

gazmangti · Post by **gazmangti** » Tue Aug 14, 2007 6:12 pm

What i do with situations like this is change the obvious, which you have done. Then book it into a vw specialist because sometimes for what it costs it isn't worth stressing about .