Whine -loss of power - intake?
07-25-04, 06:27 PM
#1
Full Member
Thread Starter
Whine -loss of power - intake?
Hey guys,
I'm very sad to say that my FD has problems. A week or so ago the car began idling iratically, as if the hose was pulled off the boost sensor. Only thing was I checked all the visible hoses and pipes; and ended up unplugging the boost sensor and the idle returned to normal. However, when I'm driving or push the car I get this whining sound. Very much like how it would sound to have a dremel tool filing down a credit card. If you can imagine. At about 4.500 rpm or if you give the car alot of gas this sound emits from under the hood and there is power loss. It's almost like the second turbo doesnt kick in.
My theory. The the top housing for my greddy dual intake had the plastic inner cone crack and the fins behind the filter were broken off. A couple of the fins could have been broken off and I believe that they got sucked into the intake system, possibly the second turbo. I guess i need to take the car to get checked out but if anyones had this problem, or knows if it may be something else, please let me know.
I saw a post like this a couple of weeks back but I can't find it.
I am also looking for a full tein flex set up. If anyone has any idea's.
I hope the whining sound isn't too serious. Thanks in advance.
I'm very sad to say that my FD has problems. A week or so ago the car began idling iratically, as if the hose was pulled off the boost sensor. Only thing was I checked all the visible hoses and pipes; and ended up unplugging the boost sensor and the idle returned to normal. However, when I'm driving or push the car I get this whining sound. Very much like how it would sound to have a dremel tool filing down a credit card. If you can imagine. At about 4.500 rpm or if you give the car alot of gas this sound emits from under the hood and there is power loss. It's almost like the second turbo doesnt kick in.
My theory. The the top housing for my greddy dual intake had the plastic inner cone crack and the fins behind the filter were broken off. A couple of the fins could have been broken off and I believe that they got sucked into the intake system, possibly the second turbo. I guess i need to take the car to get checked out but if anyones had this problem, or knows if it may be something else, please let me know.
I saw a post like this a couple of weeks back but I can't find it.
I am also looking for a full tein flex set up. If anyone has any idea's.
I hope the whining sound isn't too serious. Thanks in advance.
Last edited by ProjectRxSeven; 07-25-04 at 06:32 PM.
07-25-04, 10:00 PM
#2
Full Member
Join Date: Jun 2004
Location: MI
Posts: 55
Likes: 0
Received 0 Likes
on
0 Posts
Finally.... Boost Problems!
While not related to the makeover, but still a problem nonetheless, we've been noticing a turbo transition problem that first made itself apparent nearly two months before the accident. At first, the problem started off as a mild "hiccup" that happened every so often--only under partial throttle--just as the secondary turbocharger was coming on-line. As time progressed, so did the symptoms--eventually getting to the point where the secondary turbocharger wouldn't kick in at anything less than under wide open throttle. This "all or nothing" power delivery absolutely shattered the car's once-excellent daily driveability while contributing to some hairy on-track situations that all of us would like to forget. Fortunately, with the help of Mostly Mazda and M2 Performance, the problem, which turned out to be a lazy turbo control solenoid valve, was eventually diagnosed and immediately replaced. With nearly 65,000 miles currently on the clock, it wasn't surprising that our third-generation RX-7 developed sequential turbo system problems. With such a shamelessly complicated system, possible causes could be as simple as a malfunctioning one-way check valve (which is used to pressurize or depressurize the vacuum tanks, both of which are used to actuate the turbo switchover) or as beguiling as failing electrical connectors or loose vacuum lines (remember the "rat's nest" under the intake manifold). Fortunately, earlier in our project, we secured all the vacuum lines with tie wraps--eliminating at least one possible cause for these turbo problems.
While not related to the makeover, but still a problem nonetheless, we've been noticing a turbo transition problem that first made itself apparent nearly two months before the accident. At first, the problem started off as a mild "hiccup" that happened every so often--only under partial throttle--just as the secondary turbocharger was coming on-line. As time progressed, so did the symptoms--eventually getting to the point where the secondary turbocharger wouldn't kick in at anything less than under wide open throttle. This "all or nothing" power delivery absolutely shattered the car's once-excellent daily driveability while contributing to some hairy on-track situations that all of us would like to forget. Fortunately, with the help of Mostly Mazda and M2 Performance, the problem, which turned out to be a lazy turbo control solenoid valve, was eventually diagnosed and immediately replaced. With nearly 65,000 miles currently on the clock, it wasn't surprising that our third-generation RX-7 developed sequential turbo system problems. With such a shamelessly complicated system, possible causes could be as simple as a malfunctioning one-way check valve (which is used to pressurize or depressurize the vacuum tanks, both of which are used to actuate the turbo switchover) or as beguiling as failing electrical connectors or loose vacuum lines (remember the "rat's nest" under the intake manifold). Fortunately, earlier in our project, we secured all the vacuum lines with tie wraps--eliminating at least one possible cause for these turbo problems.
07-25-04, 10:23 PM
#3
Senior Member
Join Date: May 2004
Location: wa
Posts: 279
Likes: 0
Received 0 Likes
on
0 Posts
My 2nd turbo has made a whine sound ever (almost sounds like a vacum or something) since I got the car 2 months ago. Seems to boost just fine (don't have gauge yet), figured it was normal. Is it?
Right at 4500 rpms everytime, sounds like a vacum or like a dremel as he said. But I feel the power kick in, learned to love the sound
Please say it is normal hehe...
Right at 4500 rpms everytime, sounds like a vacum or like a dremel as he said. But I feel the power kick in, learned to love the sound
Please say it is normal hehe...
07-25-04, 10:51 PM
#4
Junior Member
Join Date: Jan 2004
Location: Sandwich, MA
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
That same sound occured really loud before I found that the small intake was really loose, no power loss though and the boost patterns seem to be normal. I tightened it up, and it doesn't really whine too loud anymore.
-Juice
-Juice
07-26-04, 03:02 PM
#6
Junior Member
Join Date: Jan 2004
Location: Sandwich, MA
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
mine does when I give it alot of gas, it doesn't make that sound all the time. It sounds like something's loose, and the air is escaping out of a small crack or something. I haven't run into any problems yet due to this, boost patterns are the same, and i'm not loosing power.
07-28-04, 01:48 PM
#7
Full Member
Thread Starter
okay, that isn't normal. That whining sound definately isn't normal. Not if its really loud. The problem I'm having now is that on top of the loss off power and the loud whining sound. I turned my car on last night and after about a min of idling, i noticed huge white puffs of smoke coming from under the hood. I popped the hood and the smoke seemed to be coming from the turbo area. I don't know what it is but it sucks.
If anyone has any idea's that would help let me know. I can't tell where exactly its coming from but its definately from the turbo area. Also I read a couple of posts with similar questions but their problems seemed different.
If anyone has any idea's that would help let me know. I can't tell where exactly its coming from but its definately from the turbo area. Also I read a couple of posts with similar questions but their problems seemed different.
Trending Topics
07-28-04, 02:38 PM
#8
Full Member
Thread Starter
I got bad news. There is a shitload of smoke coming out of the exhaust and from under the hood. There is a puddle of oil under the car. its coming from around the down pipe area, maybe just underneath it.
oh yeah and there is oil splatter on some parts of the engine near the turbo and on the intercooler piping.
oh yeah and there is oil splatter on some parts of the engine near the turbo and on the intercooler piping.
12-13-04, 10:11 PM
#11
Full Member
Thread Starter
turbo failure and things
hey guys,
I took the car to the shop. got the tein flex coilovers installed and after that they checked the oil leak. They found that the fins on the second turbo wheel had been chewed up around the edges and got possibly sucked into the intercooler or the piping
I have a large greddy front mount intercooler. So im hoping the little bits that chipped off the turbine wheel are somewhere in the intercooler or piping and it can be flushed. I doubt they could have made it into the motor (I really hope not). I just had this motor rebuilt a year and a half ago.
Now I have to save up to get my turbo's rebuilt, I need the intercooler flushed and have the pieces found and I need to run a compression test. Lots of money, unless someone has any advice or has had previous experience. If someone can give me some insight of advice I would really appreciate it. Or some honest reassurance that the tiny chips off the turbo wheel didn't make it into the motor. I almost think that the greddy airinx cheap plastic cone piece that cracked behind the air filter was sucked into the intake and caused the problem. I would like to stick to twin turbo's as I hear that single turbo's or bigger turbo's can cause more problems.
P.s as far as there being a compression Issue I highly doubt it as i turned the car off immediately after the oil started leaking and so on.
I took the car to the shop. got the tein flex coilovers installed and after that they checked the oil leak. They found that the fins on the second turbo wheel had been chewed up around the edges and got possibly sucked into the intercooler or the piping
I have a large greddy front mount intercooler. So im hoping the little bits that chipped off the turbine wheel are somewhere in the intercooler or piping and it can be flushed. I doubt they could have made it into the motor (I really hope not). I just had this motor rebuilt a year and a half ago.Now I have to save up to get my turbo's rebuilt, I need the intercooler flushed and have the pieces found and I need to run a compression test. Lots of money, unless someone has any advice or has had previous experience. If someone can give me some insight of advice I would really appreciate it. Or some honest reassurance that the tiny chips off the turbo wheel didn't make it into the motor. I almost think that the greddy airinx cheap plastic cone piece that cracked behind the air filter was sucked into the intake and caused the problem. I would like to stick to twin turbo's as I hear that single turbo's or bigger turbo's can cause more problems.
P.s as far as there being a compression Issue I highly doubt it as i turned the car off immediately after the oil started leaking and so on.
