She\'s in a bad mood tonight...

[Bobfish]

My car gets in bad moods, i swear to god.

90% of the time she is fine, boosts and drives lovely. The other 10% of the time she just wont play ball, she bucks, and sometimes plain just doesnt accelerate.  I get all of the noises i should get, and no untoward noises - i get a full 10psi of boost, but the car just doesnt go anywhere! I just accelerates really slow...its almost like its bogging, it only happens when i floor it - if i ease her up she is generally ok.

Does anyone have any idea what is causing this? its not boost control because as i say, i get 10psi of boost.  Its not a boost leak because it only happens every now and then, and i removed all of my boost pipes today and refitted them (although i did find a small boost leak)

Please someone help me, its really getting on my tits!

Spec is standard bar apexi filters, HKS sqb BOV and magnecor 10mm leads....65k mile engine usually works well however recently blown a coolant seal. (did the o ring fix)

The car did do this before the coolant seal went though...so i guess thats kindof a red herring.

Any help appreciated! thanks

[Bobfish]

also, just to add i often get a soft pop from the exhaust if i change after 5k, the problem is intermittent and the car misfired earlier at WOT in 5th gear...

[munkay]

maybe a strange suggestion but ....     clutch?

[Bobfish]

People have said clutch but its not that...its not slipping.  Its actually fixed now (i think) i changed the spark plugs and since then the problem hasnt come back...