Loosing power
04-12-2010 | 08:10 PM
#1
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 5
Hey I'm new to rotary engines so hopefully this will be an easy question for some of you guy but I took my 94 Rx7 out of the garage for the spring and the first day was fine but second day I noticed in second gear at 5,000 rpms exactly I would loose power as if I took my foot off the gas quickly. Will happen in 3rd and 4th randomly too. I live in a small city so not many people know rotaries but I'm taking it to someone in a few days wondering if anybody has any ideas thanks.
04-20-2010 | 06:54 AM
#2
Senior Member
Joined: Dec 2003
Posts: 791
From: Mid-West
Sorry, just saw this thread.....
Not alot of detail, but it sounds a little like your describing the transition hesitation that was common on these cars, even when new. If your car is near stock, it has a SEQUENTIAL twin turbo system. That means the primary turbo is effective almost immediately, with the secondary turbo coming on line just after 4k rpm. During the transition during wide open throttle, there can be a brief hesitation. This can be minimized by waiting until the car is at FULL operating temp before going into boost, and sometimes by adding additional grounds. But with the stock ECU, it's rarely eliminated completely. You might also have a sticky solenoid.
Not alot of detail, but it sounds a little like your describing the transition hesitation that was common on these cars, even when new. If your car is near stock, it has a SEQUENTIAL twin turbo system. That means the primary turbo is effective almost immediately, with the secondary turbo coming on line just after 4k rpm. During the transition during wide open throttle, there can be a brief hesitation. This can be minimized by waiting until the car is at FULL operating temp before going into boost, and sometimes by adding additional grounds. But with the stock ECU, it's rarely eliminated completely. You might also have a sticky solenoid.
04-20-2010 | 11:36 AM
#3
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 5
Sorry, just saw this thread.....
Not alot of detail, but it sounds a little like your describing the transition hesitation that was common on these cars, even when new. If your car is near stock, it has a SEQUENTIAL twin turbo system. That means the primary turbo is effective almost immediately, with the secondary turbo coming on line just after 4k rpm. During the transition during wide open throttle, there can be a brief hesitation. This can be minimized by waiting until the car is at FULL operating temp before going into boost, and sometimes by adding additional grounds. But with the stock ECU, it's rarely eliminated completely. You might also have a sticky solenoid.
Not alot of detail, but it sounds a little like your describing the transition hesitation that was common on these cars, even when new. If your car is near stock, it has a SEQUENTIAL twin turbo system. That means the primary turbo is effective almost immediately, with the secondary turbo coming on line just after 4k rpm. During the transition during wide open throttle, there can be a brief hesitation. This can be minimized by waiting until the car is at FULL operating temp before going into boost, and sometimes by adding additional grounds. But with the stock ECU, it's rarely eliminated completely. You might also have a sticky solenoid.
I took it for more test drives and took it to a rotary specialist and found out that at 2500 and 5000 rpms in 3,4 and 5 gear it will no longer be giving gas. We checked it out to be a electronic issue with something telling the car to not give it gas at these rpms. We cleaned off all the grounds and made a new one but same thing. It is manageable by making sure I shift so it doesn't hit those rpms in those gears but its annoying as hell. I do wait until the car is at operating temp before I drive it all the time or when I slow down the car will stall on me which happens to a lot of my gen. Thanks for the help.
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