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Old 05-14-05, 02:00 AM
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Boost and other issues

I am still trying to get my car to run right. First my boost issue. I hit 15psi at WOT and when I do a 3rd gear pull without boosting past 10psi I loose all boost at 5K. I can hear that there is a exhaust leak in the turbo area. My DP also gets red hot. Another problem I have is my idle. It will be good at 750ish but as soon as I start drving it will idle at 1.5k and if I drive fairly hard it will some times idle as high as 2.5K. I took it to my local cayon and did a decent speed run and when I got to the end the car really wanted to die. I believe it is an electrical problem because if any elecctrical device was turned on it would drop the idle and when I turned on the A/C it nearly died.
Old 05-14-05, 02:06 AM
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First off, we need to know your modifications. If you hit 15psi on the primary, something is REALLY wrong. It sounds like your turbo pre-control actuator/solenoid (like a wastegate for the primary only) is not opening. In turn, it'll never pre-spool the secondary turbo. Also, your turbo control actuator/solenoid could be bad too.

http://www.autosportracetech.com/RX-7/rx7stuff.htm

Read through that website and come back to us (or me). Feel free to IM me on AIM if you need further help.
Old 05-14-05, 02:18 AM
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Dude, if your hittin 15 psi, you gotta be leanin it out. Im suprised you dont hit fuel cut off every time. . . And yes i agree with Walien... your vacuum lines or solinoids are messed up. May be time to get a silicone hose job!!
Old 05-14-05, 02:28 AM
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Yeah I was plannin on having to do the vacuum hose job soon. I have looked at that site already I just havent had the time to go over everything yet. I try not to hit 15psi. I have a Pettit ECU probably unlimited because I havent hit fuel cut . Intake, DP and catback. I also have my battery relocated to the trunk.
Old 05-14-05, 06:29 PM
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Nevermind the boost problem. Today my idle was around 2.5 to 3k!! It would not drop. Any ideas?
Old 05-14-05, 11:32 PM
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anybody? It even wants to jump higher then that when I shift.
Old 05-15-05, 12:35 AM
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mods?? I had this problem and the source was a blown secondary injector. it was stuck open and the pfc "learned my idle and set it to 2500 to compensate for the fuel......... I think.... I have yet to see if that was the probelem after I upgrade my fuel system
Old 05-15-05, 02:47 AM
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Yeah I think it is an injector problem because when I drove home on the freeway it stopped doing? Maybe me being on the throttle burned off the excess fuel. My mod list is a couple posts above.
Old 05-15-05, 08:11 PM
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Bump
Old 05-15-05, 08:28 PM
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Try adjusting your TPS. It solved many of my idling problems...Just a thought.
Old 05-15-05, 08:33 PM
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I checked the TPS a couple of days ago and it seemed to be in the ok ranges.
Old 05-15-05, 09:13 PM
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find a rotary specialist that knows what they are doing or start making friends with the search button.

you have both a boost leak as well as vacuum issues. if you aren't careful, you'll have a blown motor too.
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