v3 STI

duncan · Post by **duncan** » Sun Feb 10, 2008 9:07 pm

TK - the wgdc is not set right for the exhaust system on your car. there is less back pressure in it and this means it hits boost target quickly. In fact it overshoots it, then realises that it has gone past and shuts it down slightly.

Mapping will cure this completely.

If it was actuator it would either not hit target or go beyond and stay beyond until turbo ran out of puff.

duncan · Post by **duncan** » Sun Feb 10, 2008 9:11 pm

plus fueling would be sorted in the mapping :thumb:

Tk · Post by Tk » Sun Feb 10, 2008 9:30 pm

makes perfect sence dunc
gerry you still got that power fc :lol:
think i may just save a few pennys and get a simtec to do away with the maf and also save me

Gerry H · Post by **Gerry H** » Mon Feb 11, 2008 9:24 pm

PFC's gone Trev. I'd have advised you get a Simtek anyway. It seems a better package plus there's no need for a MAF at

Tk · Post by Tk » Mon Feb 11, 2008 9:53 pm

i'v got an old hks evc boost controller in the garage that should work for now, as i just dont have the spare cash for a new ecu and map at the moment, im thinking about taking the car off the road and sorning it as the tax runs out end of the month until i can get an ecu (i barely use it anyway) last thing i want to do is damage the new engine
we shall see

ScoobieWRX · Post by **ScoobieWRX** » Mon Feb 11, 2008 10:31 pm

Try to slacken the wastegate arm by a half turn. Until you get it remapped/diagnosed you might find that helps a bit with overboost.

Gerry H · Post by **Gerry H** » Mon Feb 11, 2008 11:09 pm

This is all rather sad. Was hoping to see you and a few others at North Weald next month.

Tk · Post by Tk » Tue Feb 12, 2008 6:52 pm

im hoping to be there jerry, if i can get someone to test my fuelling with one of them things (wideband is it ?) i might be alright just for now until i can get a simtec in a month or two.

can anyone test my fuelling for me on here for a few beers ?

Gerry H · Post by **Gerry H** » Tue Feb 12, 2008 7:07 pm

With the prospect of a Simtek sale a little later, try Zak at Mocom and explain what the problem is. Worth a try, I'm down there tomorrow

Tk · Post by Tk » Sun Feb 24, 2008 2:21 pm

went to the car today after not going near it for a while due to it pissing me off ,i even thought the new engine was knocking last time i was near it,,

anyway i think my problem has been solved, started it up and sounded okish , let it run on idle for a few mins while i had a cuppa, went back to it jumped in and power steering felt all notchy , funny noise sort of a knock which changed slightly when putting foot on clutch, under the bonnett sounded a bit clattery, so i thought thats it cars screwed again but then i notticed the main crank pulley looking a bit wobbly so stopped engine and felt it , yep definatly wobbly put my finger on the bolt and it was just about ready to drop out could even do it up with my fingers for several turns, anyway got right size socket and long bar and tightened it up and sounds great again ,power steering feels all good no different noises when putting foot on clutch

question is though how do i fullly tighted the bolt is there a peg you put into one of the pullys, the person who fitted the engine will be getting a call tomorrow for sure

and also had the walbro pump out the tank again as its been bugging me i did not cable tie it and worried it was flapping around (it wasnt)