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BMW 3-Series (E90 E92) Forum
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2 Limp Modes in 4 Days
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07-13-2008, 09:07 AM | #1 |
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2 Limp Modes in 4 Days
So, I first threw a reduced engine power light a week after I got my car. I attributed it to 3rd gear rev limiter. I plugged the exhaust valve plug back in for a bit, and couldnt reproduce the problem. That was at about 1000 miles, if that. Since then, no problems until this past week.
I cruising at 40 mph in 4th gear, AC on, real humid day out. All of a sudden, light comes on, half engine power. I pull over, shut it off, start it back up, all is fine. Yesterday, a/c is off, windows down on the highway, 6th gear, I go full throttle to about 120 mph, light goes on again. I noticed that while in reduced power mode, in 2nd gear I'm boosting up to 7 psi, but in 3rd, only 5 psi. Pretty irrelevant to the problem anyways. I have SSTT, DV's, and dual cones, and the exhaust valve unplugged. No boost leaks anywhere, so I think I'll take a trip to the dealer. |
07-13-2008, 09:19 AM | #2 |
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could be your windows? Are they tinted? joking ... sorry bro, don't know what it could be...i have an aftermarket exhaust on the car and I have the exhaust valve unplugged obviously from the stock exhaust and because it doesn't have a spot to go on the new exhaust, i just plugged it with a screw i found...i wouldn't leave that valve completely unplugged even if you're doing only a golf-tee mod..
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07-13-2008, 09:26 AM | #3 | |
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Try both of those things (bypass first) and come and report back. Once you do that it might be easier to diagnose it....
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07-13-2008, 10:00 AM | #4 |
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What do you mean by bypassing a solenoid??
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07-13-2008, 10:06 AM | #5 |
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http://burgertuning.com/instructions/JuiceBox335i.pdf
Look on pages 13-14 and do that to your car. Be careful when pulling the solenoids off, make sure to pull straight out and not sideways. Give that a shot and see if the limps come back. I have a feeling that they wont.
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07-13-2008, 10:29 AM | #7 |
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Limp modes dont always throw codes. Usually check engine lights, or service engine soon lights do.
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07-13-2008, 12:08 PM | #9 | |
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07-15-2008, 04:23 PM | #10 |
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So...what happened when you tried it on Monday?
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