if i go from a dead stop and hit the gas to wot i get good boost patterns in first and second. but when i shift to third it seems like i can't get the boost to come above 4. whenever i take first or second gear to ~6000 rpm then this happens. any ideas? from a roll if i punch in second gear i'm okay, might take a sec, but boost climbs to 12. same thing if i'm going from a roll in third. mods are intake, dp, cb, pettit ecu and hd boost controller. car has 65k miles on it. usual boost pattern is 12-7-8(i know it's not supposed to be like that, still haven't got the needle valves dialed in right) i tried asking on the other forum but didn't get much help, so here i am.

nick

 

Sorry. I have no clue.. WTF am I doing here anyways....?

Where'd my pant's go?

 

sounds like a bad solenoid!

 

Wish I could tell you. I still have a perfect boosting car. Haven't yet been graced with the troubleshooting... sorry!

 

wish i had a perfect running car vosko, are you talking about the turbo pre-control and the wastegate solenoids underneath of the pressure chamber?

nick

 

yeah one of those is possibly failing causing intermittent boost.....

 

wow your boost patterns suck big time



we need more info.



1. did it start happening out of no were?





2. did you not drive it for a long time and when you started driving thats when it happend?





3. odd or noticable backfire



4. how many miles?





5 rebuilt engine yes or no ---- when?



6. rebuilt turbo yes or no?

 

it's been happening for a little while now. i don't really race it that often off the line so it's not like it happens all the time.

car has 65k miles on it.

original motor/turbos.

my car has always backfired, just thought it was normal.

and thanks vosko, i'll look into having those replaced.

nick

 

diagnosing the stock system can be a huge pain.............. KDR is awesome at it but expect a wait

 

turbo's stay good for about 100,000 to 120,000. but i have seen some that need some lovin before 100,000 boost patter that scazy are always stock controll problems or pre-cat or cat problems.



easy way(also the cool way) or the hard way(also the expensive wa)





easy

bypass the stock controls and get a aftermarket boost controller. i Love apec-r about ($450) @ rx-7store.net



hard

take it to someone and get and eventually have more problems another 60,000 miles