Primary turbo inconsistent(5psi)TC?
#1
Junior Member
Thread Starter
Primary turbo inconsistent(5psi)TC?
Hi, I have this issue with my primary turbo. Sometimes I will boost with no problems to 10 psi, (all test runs done in third gear) then after the 3rd or 4th test run the exhaust tone changes and I only get about 5 psi max.
I let go off the throttle and try again still 5psi and exhaust tone is totally different seem louder.
I’m thinking my turbo control solenoid is the problem, what do you guys think?
Thx a lot
Stock FD downpipe, viton check valves, silicone hoses,sequential turbo.
I let go off the throttle and try again still 5psi and exhaust tone is totally different seem louder.
I’m thinking my turbo control solenoid is the problem, what do you guys think?
Thx a lot
Stock FD downpipe, viton check valves, silicone hoses,sequential turbo.
#3
same issue
Try looking at this site first:
http://www.fd3s.net/boost_problems.html
and
http://www.autosportracetech.com/RX-7/rx7stuff.htm
I have a very similar problem. Intermittently the primary turbo does not spool assoc with change in exhaust tone. I am in the process of tracking down the problem and and have found so far that when it does into this "mode" the turbo control actuator is half retracted when it should not. You can see this part under the car without jacking it up. will be checking TC solenoid and check valves next. Noticed ur in the DC area too whereabouts?
http://www.fd3s.net/boost_problems.html
and
http://www.autosportracetech.com/RX-7/rx7stuff.htm
I have a very similar problem. Intermittently the primary turbo does not spool assoc with change in exhaust tone. I am in the process of tracking down the problem and and have found so far that when it does into this "mode" the turbo control actuator is half retracted when it should not. You can see this part under the car without jacking it up. will be checking TC solenoid and check valves next. Noticed ur in the DC area too whereabouts?
#4
Junior Member
Thread Starter
yep today I changed all the check valves with viton ones, didn't fixed anything still get inconsistent with primary boost sometimes. I read that TC actuator don't usually go bad so it might be the Turbo Control solenoid. Next thing I will do is test the TC solenoid, It will take awhile to get in there tho. I'm around arlington a bridge away from DC.
Tell me what you find.
THX
Tell me what you find.
THX
#5
Junior Member
Thread Starter
I check my Turbo control solenoid today, gave it some power and it didnt even click.
I replaced it with a used one i had, now i still get 6 psi on PRIMARY sometimes, and my transition is low 10-6-11 so replacing the solenoid didnt help, i checked the solenoid rack all properly routed,check pressure chamber holds 10+psi, along with vacuum chamber holds vac. replaced all check valves with Dale clark ones, no boost leaks. I Will be replacing tomorrow the pre-control and wastegate solenoids.
Any else got something I should look out for.
I replaced it with a used one i had, now i still get 6 psi on PRIMARY sometimes, and my transition is low 10-6-11 so replacing the solenoid didnt help, i checked the solenoid rack all properly routed,check pressure chamber holds 10+psi, along with vacuum chamber holds vac. replaced all check valves with Dale clark ones, no boost leaks. I Will be replacing tomorrow the pre-control and wastegate solenoids.
Any else got something I should look out for.
#6
Junior Member
Thread Starter
Well today I switched pre-control and wastegate solenoids, still no fix. After putting the car back together (solenoid rack and UIM,etc) I noticed a loud blowing wind like noise when secondary comes online, but my boost is 11 psi after transition. I wonder why its loud I can hear it in the cabin really loud blowing sound but no boost loss weird. Any thoughts?
#7
2/4 wheel cornering fiend
Have you checked the main hose leading to your BOV, as well as the small hoses leading from the primary turbo to your CCV and BOV actuators? Just because you're still boosting 11 psi after transition doesn't mean you don't have a leak. The system will compensate for the leak if it's not that big, meaning your turbos will just work harder.
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#8
Junior Member
Thread Starter
Main hose leading to my BOV is ok as well as Y pipe to BOV (new hoses). Small hose all routed properly BOV as well as CCV. "Just because you're still boosting 11 psi after transition doesn't mean you don't have a leak." Which system will it make it compensate? What about my 10-6-11 any ideas?
#9
2/4 wheel cornering fiend
Originally Posted by raptor17
"Just because you're still boosting 11 psi after transition doesn't mean you don't have a leak." Which system will it make it compensate?
At this point, I would start checking the operation of your pre-control actuator, since you're getting inconsistent primary boost.
#10
Senior Member
iTrader: (3)
Originally Posted by raptor17
Stock FD downpipe, viton check valves, silicone hoses,sequential turbo.
Last edited by jd to rescue; 08-31-06 at 01:30 PM.
#11
Junior Member
Thread Starter
I meant stock FD, downpipe(pettit). Ok I will get 4 new turbo solenoids and check again then I will check pre-control actuator. I will update when I get the parts(few weeks) Thanks Alot.
#12
Junior Member
Sorry to bring the post back
But I am having the EXACT problem... Was the cause ever found?
I have no secondary boost before. And went into shop and replaced one of the solenoids. And now I am occasionally getting primary boost but no more after if I transitioned to secondary after a run. After driving for a long while, primary boost may come back. And its driving me insane.. seems like my car is haunted.
I have no secondary boost before. And went into shop and replaced one of the solenoids. And now I am occasionally getting primary boost but no more after if I transitioned to secondary after a run. After driving for a long while, primary boost may come back. And its driving me insane.. seems like my car is haunted.
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