at a total loss

[REDSPDWGN]

a week ago i put a ATP long downpipe on my 2007 speed3 this exposed a smoking problem, and when i say smoking problem i mean i cant even see the car behind me at idle only though, when i replaced the down pipe i checked the hot side of the turbo for shaft play and found nothing, im not burning through oil and there is no oil in the top mount, so i dove for maybe 5 miles and when i got back to my buddys shop we ran a compression test why i have no idea the car then sat for a good 4 hours i went to leave drove a bit let the car warm up and then hit it and ever since then i have had a cyl 3 misfire and a random misfire. the car only misfires at full boost if anyone has any ideas on what may be wrong please let me know cause its driving me insane thanks


-Matt

 

[chimmike]

uhm. First, if you add add a downpipe, you NEED something to monitor your fuel pressures. What are your fp at WOT ?

Turbo smoke: likely the seals. Not uncommon. What weight oil are you using? I'd recommend the bnoon restrictor bolt and 5w40 syn, Rotella T. Even still, you may get smoking, once it starts, it ain't gonna stop.

 

[meicalnissyen]

aever since then i have had a cyl 3 misfire and a random misfire. the car only misfires at full boost if anyone has any ideas on what may be wrong please let me know cause its driving me insane thanks


-Matt

while you were doing the comp test, you altered your ignition the little bit it needed to start misfire
diged a plug, picked up a wisker foul, screwed the cap up a bit, dislodged the spring, etc