Jerking under hard acceleration

Cobbshark · 02-12-2016, 08:01 PM

Hi, I just bought a 07 335xi about 5-6 months ago and have been loving it ever sense. I got a cobb for it and its an amazing little device. I'm running it on stage 1 aggressive right now running on 93 oct. Before I got the cobb I had taken it to someone to check the codes and he said there was a cylinder 1 misfire, but I've taken it to the dealership since then and the cobb never read any misfire code. The only one I have is the dmtl, fine leak which I have been looking into too. Unfortunately at say 5th-6th gear at around 2000 or so trying to get to go there's a very hard hiccup or jerking feeling you get. I've already looked into it on here and there have been 2 posts ill post below. My cobb doesn't read any of the codes but some think its the vanos solenoids, injectors, knock sensors but I've yet to find an answer. I want to continue to upgrade my car but I can't if its not even functioning properly. I brake boosted it to about 2k today and did a takeoff and it immediately started, so I let off which it usually stops, but it continued to hiccup and making a weird ass noise. So I pulled over and still its like car was dying or something. I told this to my coworker and he thinks it could be the stock diverter valves obviously not strong enough for much boost and it staying in the engine fucking shit up. I'm loving this car's but today made me almost give up. Does anyone have any ideas?
http://www.e90post.com/forums/showth...ht=rpm+studder
http://www.e90post.com/forums/showth...ht=rpm+studder

08TUNDRA · 02-13-2016, 02:17 AM

Might be related... but in the past week my xar has started jerking at almost WOT and its taking really long times to crank sometimes so my hpfp is toast soon i just want ut to give me a code so i dont waste diagnostic fee at dealer for nothing. I think you might look into your hpfp.

TBN54 · 02-13-2016, 10:48 AM

This is fairly common with the 335s.

Are you aware of the last time that your ignition coils and spark plugs were replaced OP?

Kenneykickin · 02-13-2016, 06:45 PM

Quote:

Originally Posted by TBN54

This is fairly common with the 335s.

Are you aware of the last time that your ignition coils and spark plugs were replaced OP?

+1 most likely will solve issue unless you've recently already done them BOTH

02-12-2016, 08:01 PM	#1
Cobbshark New Member 0 Rep 5 Posts Drives: 2009 E82 135i Join Date: Jan 2016 Location: Covington, Kentucky iTrader: (0)	Jerking under hard acceleration Hi, I just bought a 07 335xi about 5-6 months ago and have been loving it ever sense. I got a cobb for it and its an amazing little device. I'm running it on stage 1 aggressive right now running on 93 oct. Before I got the cobb I had taken it to someone to check the codes and he said there was a cylinder 1 misfire, but I've taken it to the dealership since then and the cobb never read any misfire code. The only one I have is the dmtl, fine leak which I have been looking into too. Unfortunately at say 5th-6th gear at around 2000 or so trying to get to go there's a very hard hiccup or jerking feeling you get. I've already looked into it on here and there have been 2 posts ill post below. My cobb doesn't read any of the codes but some think its the vanos solenoids, injectors, knock sensors but I've yet to find an answer. I want to continue to upgrade my car but I can't if its not even functioning properly. I brake boosted it to about 2k today and did a takeoff and it immediately started, so I let off which it usually stops, but it continued to hiccup and making a weird ass noise. So I pulled over and still its like car was dying or something. I told this to my coworker and he thinks it could be the stock diverter valves obviously not strong enough for much boost and it staying in the engine fucking shit up. I'm loving this car's but today made me almost give up. Does anyone have any ideas? http://www.e90post.com/forums/showth...ht=rpm+studder http://www.e90post.com/forums/showth...ht=rpm+studder
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02-13-2016, 02:17 AM	#2
08TUNDRA Lieutenant 125 Rep 445 Posts Drives: 2008 e92 335i Join Date: Jul 2014 Location: San Diego CA iTrader: (6)	Might be related... but in the past week my xar has started jerking at almost WOT and its taking really long times to crank sometimes so my hpfp is toast soon i just want ut to give me a code so i dont waste diagnostic fee at dealer for nothing. I think you might look into your hpfp.
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02-13-2016, 10:48 AM	#3
TBN54 Captain 425 Rep 793 Posts Drives: 08' E92 335 -> 17' F30 340i Join Date: Dec 2015 Location: Upstate NY iTrader: (0)	This is fairly common with the 335s. Are you aware of the last time that your ignition coils and spark plugs were replaced OP?
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