H.Q. RALLY PREP

I have just taken my recently imported version 2 for its first mot to register it and the first time i floor it it misfires and runs really rough as it comes on boost but if you drive gently up the rev range it will sit at 5-6000 rpm ok but it does it in any gear at any revs so what is going on, It is completely standard except for a hks panel filter, it still has the standard pee shooter exhaust!!!!!!!!
anyone got any suggestions before i have to get it checked out, the check engine light is not coming on which to me says it cant be a faulty sensor but it sounds like the re-circ dump valve is chirping away when it is misfiring! or could it be the wastegate opening early????????

cheers mark

STI5300

iTrader: (4)

Why don't you connect up the onboard diagnostic set up and see if it shows what is malfunctioning, lost of info about how to do this very,very ,very easy.

Come back if you can't find it

FB Tuning

iTrader: (30)

Take the plugs out first and check condition and gaps - Should be NGKPFR6B or equivalent, fitted as standard with a gap of 0.7 mm IIRC.

Then look at the coilpacks - check the isulators as they are prone to cracking.

Regards

H.Q. RALLY PREP

go on then , enlighten me on the onboard diagnostics?????

Also i have been advise to change the pump,plugs and coil packs, Is this good info to start with?????
cheers mark

STI5300

iTrader: (4)

my RA and your car has a self diagnostic system built into the standard ecu, there are a pair of connectors close to the steering column, practically above your left knee. if you connect these and turn on the ignition the check light pulses a code which can be converted to the faulty component. www.saxonfields.freeserve.co.uk has the info, if you cant find it here let me know, or search for it on scoobynet I have seen links posted before.

Andrew

H.Q. RALLY PREP

Thanks for the link to the diagnostic check very handy to keep.
It did not show up any codes just a stedy constant flashing which means no faults found on the ecu???
This cant be a bad thing but i still have a misfire
I will probably get a set of spark plugs and four coil packs to try for the weekend, i also have a new motorsport fuel pump to fit aswell and fuel sender units as they are not working either!!
Any more suggestions???

cheers mark

Scooby125

I would be nearly 100% sure it is either the plugs opr coil packs. Try the plugs first as these are the cheaper option and then the more expensive option of the coil packs. I replaced both on mine and she pulls sweet up through the gears now.

H.Q. RALLY PREP

I have just ordered coil packs and plugs for it
will let you know how i get on.........
cheers mark