2009 N54 335i - Rough Idle and misfiring when cold
Discussion
MikeTFSI said:
Have finally succumbed and booked the car in for the work to be done at local BMW dealer. Including an oil change + filter change the total damage is £1818.46 aftet discount. From my back pocket....
I just simply cannot do without a car anymore, so need it done. I will be naming and shaming soon, all over the internet and leaving reviews wherever I can. These cowboys must be dealt with.
I will also be reporting to trading standards and the new ombudsman that covers this. Hopefully someone else will be spared from these dodgy dealers.
On the plus side I will finally have a working car again! Haven't driven it for weeks so can't wait to have it running again.
Its sad to hear this man, I recently just bought a 330i with the N53 engine and am having injectors replaced today. The seller was a trader and is paying to replace just the 1 faulty one and see if it needs more. Typical used car trader.I just simply cannot do without a car anymore, so need it done. I will be naming and shaming soon, all over the internet and leaving reviews wherever I can. These cowboys must be dealt with.
I will also be reporting to trading standards and the new ombudsman that covers this. Hopefully someone else will be spared from these dodgy dealers.
On the plus side I will finally have a working car again! Haven't driven it for weeks so can't wait to have it running again.
This is an interesting thread. I have a 2006 335i and have owned it since 2011 at 27k miles. Currently at 66k miles.
I too have slightly rough running at idle and sometimes flies and sometimes feel bogged down. It's not severe, but I notice it. no error codes. Recently had all 6 injectors replaced at a cost of £1600, also replaced valve cover gasket + new checkvalves to elimate vacumm leaks, new coils and plugs. I also had a walnut blast at 49k miles and a manual clean at 64k miles. Both Turbos replaced at 35k miles.
Would this point to a HPFP? or perhaps failing Wastegate vacumm solenoids?
The fuel being used is not a wifes tail. When ever I've filled up with Tesco momentum 99 my car has always run rougher than other fuels. I put this down to Tesco 99 being 5-10% ethanol based. The whole problem in the USA with HPFP was to do with the Ethanol content in the fuel degrading the rubber seals in the pump.
I too have slightly rough running at idle and sometimes flies and sometimes feel bogged down. It's not severe, but I notice it. no error codes. Recently had all 6 injectors replaced at a cost of £1600, also replaced valve cover gasket + new checkvalves to elimate vacumm leaks, new coils and plugs. I also had a walnut blast at 49k miles and a manual clean at 64k miles. Both Turbos replaced at 35k miles.
Would this point to a HPFP? or perhaps failing Wastegate vacumm solenoids?
The fuel being used is not a wifes tail. When ever I've filled up with Tesco momentum 99 my car has always run rougher than other fuels. I put this down to Tesco 99 being 5-10% ethanol based. The whole problem in the USA with HPFP was to do with the Ethanol content in the fuel degrading the rubber seals in the pump.
12 plate 335i with 26k and the waterpump has failed and cracked the expansion tank this weekend passed! £1200 but with BM good will its £400 odd. Still quite a fresh car and late in the generation. In early spring I had an issue with a sportsbike dealer, it was distance buy so bike was delivered >200m by van. When it quit on me in the first week I took advise and a "99% sure" it was battery, replaced that, next ride quits again. Advised to get it back to them ... >200miles ! I checked the wording of the new consumer legislation recently passed (think Oct 15) and advised them of this and said I had no confidence and wanted money back! They said ok, return bike and we will refund I said no, its your responsibility, reluctantly they came for the bike and I got my refund. It took another month for them to cough up £50 for the battery ! The law is on your side, you have 6months +
dfh81 said:
I had the exact same issue with a 2006 335i, turned out to be the HPFP. This was also just after having the waterpump replaced! The car was just over 100k when it all happened.
Hi what symptoms did you have? did it manifest itself with stubbly idle and sometimes bogged power delivery or more severe syptoms like what MikeTFSI originally described? Thanks amacbrown, you are right the law is on my side but there is no way to enforce the law except for the court system.
I cannot speak with them on the phone as they won't answer me at all. They ignore letters and emails. Trading standards / ombudsman or other dispute resolution services can't help me if the trader won't engage, so only option is court.
But...I am in difficulty proving who the seller is as they left the invoice blank and I do not have a screen shot of the advert either. Monies paid are also on bank statement as a different company. So if I apply to the small claims court am I on an expensive hiding to nothing anyway? It seems that they change the name of the business when the going gets tough so expect them to do the same if they get any application from me.
I cannot speak with them on the phone as they won't answer me at all. They ignore letters and emails. Trading standards / ombudsman or other dispute resolution services can't help me if the trader won't engage, so only option is court.
But...I am in difficulty proving who the seller is as they left the invoice blank and I do not have a screen shot of the advert either. Monies paid are also on bank statement as a different company. So if I apply to the small claims court am I on an expensive hiding to nothing anyway? It seems that they change the name of the business when the going gets tough so expect them to do the same if they get any application from me.
Monkey_boy said:
dfh81 said:
I had the exact same issue with a 2006 335i, turned out to be the HPFP. This was also just after having the waterpump replaced! The car was just over 100k when it all happened.
Hi what symptoms did you have? did it manifest itself with stubbly idle and sometimes bogged power delivery or more severe syptoms like what MikeTFSI originally described? The car was faultless for a year then both the waterpump and the HPFP went! Cost me over £1200 to sort out both. After that the car was fine for a couple of months, until the Turbos started to whine on revving the car in neutral. I decided to trade it in and bought a Z4 Coupe! Shame as it was such a decent all rounder.
dfh81 said:
Occasional rough start & idle, then without warning would loose power - car shaking badly on any attempt at acceleration and then EML. I'd pull over give it a minute, and it would start and drive fine again. It would then do the same thing the following day. So more in line with what MikeTFSI experienced.
The car was faultless for a year then both the waterpump and the HPFP went! Cost me over £1200 to sort out both. After that the car was fine for a couple of months, until the Turbos started to whine on revving the car in neutral. I decided to trade it in and bought a Z4 Coupe! Shame as it was such a decent all rounder.
Well mine went in for Injectors yesturday. Garage did a extended road test and found no fault with it after 30 miles. Within 10 miles of me getting it back had gone back into limp mode. Cylinder 2 misfire and bank 1 oxygen sensor lean. So its back down for more investigationThe car was faultless for a year then both the waterpump and the HPFP went! Cost me over £1200 to sort out both. After that the car was fine for a couple of months, until the Turbos started to whine on revving the car in neutral. I decided to trade it in and bought a Z4 Coupe! Shame as it was such a decent all rounder.
I ran a mapped N54 335i until earlier this year. Its possible that some of the fault issues described in the thread are down to the vanos solenoids. Made a world of difference when I had mine cleaned........symptoms were occasional hunting when idling from cold and EML at the end of long journeys ( i.e. when oil was at higher temps and lower pressures )
There are many threads online regarding the inlet and exhaust solenoids causing issues on N54s, the camshaft bearing ledge also wears. http://www.n54tech.com/forums/showthread.php?t=206...
Its hard to say whether or not cleaning is enough to fix the problem; many say just replace both of them 'cos they're only £90 each and very simple to change. Lots of anecdotal evidence out on the web of owners' 335i cars running far better/smoother after solenoid replacement.
Hope that helps.
There are many threads online regarding the inlet and exhaust solenoids causing issues on N54s, the camshaft bearing ledge also wears. http://www.n54tech.com/forums/showthread.php?t=206...
Its hard to say whether or not cleaning is enough to fix the problem; many say just replace both of them 'cos they're only £90 each and very simple to change. Lots of anecdotal evidence out on the web of owners' 335i cars running far better/smoother after solenoid replacement.
Hope that helps.
Bit of an update. The injector seems to of solved the lambda sensor running lean fault but the misfire came straight back.
gent at the garage had a look and noticed that the brand new bosch coils i have bought the clips that hold the loom in place were very weak and allowing the connector to come out with ease. New coils fitted and it seems i have zero misfire!!
gent at the garage had a look and noticed that the brand new bosch coils i have bought the clips that hold the loom in place were very weak and allowing the connector to come out with ease. New coils fitted and it seems i have zero misfire!!
Glad you got it sorted mate.
I finally have a working car. 6 injectors, 6 plugs, oil and filter, air filter and microfilter later and I am on the road again.
I'm broke now though.... £1900 for the above but at least the car had been given a clean bill of health by BMW and my Mondial warranty kicks in on Saturday so happy days from here on in hopefully. I will still be seeking my money back from Prestige cars of Bristol though... oops...
I finally have a working car. 6 injectors, 6 plugs, oil and filter, air filter and microfilter later and I am on the road again.
I'm broke now though.... £1900 for the above but at least the car had been given a clean bill of health by BMW and my Mondial warranty kicks in on Saturday so happy days from here on in hopefully. I will still be seeking my money back from Prestige cars of Bristol though... oops...
dfh81 said:
Monkey_boy said:
dfh81 said:
I had the exact same issue with a 2006 335i, turned out to be the HPFP. This was also just after having the waterpump replaced! The car was just over 100k when it all happened.
Hi what symptoms did you have? did it manifest itself with stubbly idle and sometimes bogged power delivery or more severe syptoms like what MikeTFSI originally described? The car was faultless for a year then both the waterpump and the HPFP went! Cost me over £1200 to sort out both. After that the car was fine for a couple of months, until the Turbos started to whine on revving the car in neutral. I decided to trade it in and bought a Z4 Coupe! Shame as it was such a decent all rounder.
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