alright well i had a few hesitations tonight, on the highway pushing the car and puttin it into third, shift into 4th and at 5000 i get a stuble still 5500, then it was fine.. it happend a few times and once from 4 to 45 then 5 to 55 again so i babied it home. a friend told me its probable the air bypass valve, he said probably leaking cause i would be making full boost, so just curious what should i do ? go aftermarket bov or replace the abv..
any help would be great thanks
kyle

 

Year and model?

 

try and give more detail about he the year model,engine,becuase they not all the same

 

sorry , its an 87 tII

 

what are your mods and how much boost are you running

 

3inch exhaust downpipe back and thats it, i ported the wastegate....k&n pannel filter .. new wires and spark plugs lol.. thats all
no actual number on boost, stock ish maybe some creep with ported waste gate..

 

sounds more like fuel cut from overboosting. be careful and go gentle on throttle until you figure out how much boost you are running and get a boost controller or your next thread is going to be about having a bad idle and the car not making any power (b/c you blew the motor).

 

ok.. im going to buy a boost gauge today and maybe boost controller and ill go from there .... could it be bad secondaries ? just need to be cleaned ?

 

unlikely

 

ok well i bought and installed boost gauge.. im hitting 8psi.. but havent beating it up yet .. just a bit..but it seed to peek at 8 and would stay around 6 or 7 my passenger said lol ..
so im ordering a fcd and buying a manual boost controller.. hopefully fcd will help me out..

 

A boost controller cannot lower boost.

Fuel cut is at 8.6 PSI, so it sounds like that is your issue.

Be careful after the FCD is installed. You'll start running out of fuel before 10 PSI.

 

well if i get one can i just make sure it stays at 8 psi.. ?

 

Thats the problem. With a full open exhaust, w/o any restrictions, its extremely difficult to control the amount of air flow (and therefore the boost). Especially up in Canada where its cooler and the air is thinner than in hot climates.

When I had a TII and lived in the North East, I had to run the stock airbox w/ a paper filter and a cat in order to haven enough restriction in air flow so that I could control boost to safe levels. YMMV.

I think you'll need to add some restriction to your exhaust and/or intake to try and keep boost at 8 PSI.

 

ok well i have replaced the stock air box i had a crack in the intake pipe and i put k an n pannel filter in .. and plan on keeping it stock ...there is a cat but i was about to get a test pipe made lol i guess ill hold off onthat too.. ok i think itll be fine when i get the fcd.. for a while at least..
thanks for every ones help and ideas.. i was about to pull my secondaries and pay to get them cleaned lol glad i asked first