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Persistent ses under wot
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05-26-2015, 11:29 AM | #1 |
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Persistent ses under wot
Looking for advice.
I have a n54 335is. With cobb tune. When I'm in 3rd gear and wot I get ses and limp mode. Funny part is the turbos are still working fine in limp mode. I replaced the plugs and packs not even 4k miles ago. The codes I pull is like lambda prob before cat. What does that mean? The engine runs fine after ses light and power cycle removes the fash warning. |
05-26-2015, 03:06 PM | #6 | |
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05-27-2015, 11:26 AM | #7 |
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Ok so weird thing was I assumed that was the code. Since I was getting it for awhile. I reset the ecu for service and my new codes are.
P29cf P30ff Always happens in 3rd at wot. I just replaced coils and plugs. Is cylinder 3 have a bad pack? |
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05-27-2015, 11:38 AM | #8 | |
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As far as misfire, you can move the coil pack and see if it follows. If the misfire follows it's the coilpack. If it doesn't follow it could be fuel injector. If your spark plugs have over 25,000 miles on them then you'll want to just replace all of them as they are over due and could cause misfires. |
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05-27-2015, 11:47 AM | #9 |
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Ok I'm going to swap cylinder 3 and 4 and see what happens. I replaced the cp recently to a bms one. It isn't straight on the throttle body. It has a slight angle and maybe it isn't fully on the o ring?
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05-27-2015, 06:01 PM | #10 | ||
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05-28-2015, 02:16 PM | #12 | ||
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How many miles on them? Any tune? What else was done to the car recently, modifications wise? Clean you vanos solenoids. If that doesn't work to get rid of the vanos codes then they need to be replaced. |
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05-28-2015, 03:25 PM | #13 | |||
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05-28-2015, 04:05 PM | #14 | |
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05-28-2015, 04:11 PM | #15 | ||
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05-28-2015, 04:54 PM | #16 | |
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Pre cats have several codes for either failure to communicate, mixture, temp, ETC. |
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05-28-2015, 04:57 PM | #17 | |
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05-28-2015, 05:24 PM | #18 | |
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In your case, since you're smelling fuel, you should pull spark plugs first. Check for fouling, if fouled look into that injector. After that injector is ruled out and cat codes still present you may want to replace o2 again. If replacement doesn't work I think you have me stumped. O2 sensors are actually sensitive. I've had some fail just from installation. Biggest issue is how it's handled before it's delivered to you, IE if it were dropped. |
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05-28-2015, 05:26 PM | #19 | ||
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06-13-2015, 06:28 PM | #20 | ||
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