Long cranks, normal???

NRudy · 11-28-2015, 01:10 PM

Hey guys,

I own a 2007 335i and i have had a lot of money spent trying to cure a long cranking issue.

The car has never coded for it and when running seems to run fine.

However on a warm start (run to operating temp then parked a few hours) ill sometimes get a 2 second crank.

Ive had my coils and injectors checked, new hpfp less than 500 miles ago and major cylinder head and camshaft rebuild / replacement. Timing was checked and set too.

My dealership are getting tired of me always having my car in there 7 times in 6 months or so and a total of 8-9k of work but everything but the long cranks is fixed.

Do i ignore the cranks till it codes or do i press for it to be resolved?

Phil325i · 11-30-2015, 04:27 AM

Typically long cranks are down to a failing HPFP. Surely the dealer will know that and could check the pump's performance?

NRudy · 11-30-2015, 06:49 AM

My last hpfp didnt fault and was within acceptable perameters, they replaced it due to the hpfp puma case so its all new but i still on the odd occasion get a long crank.

djgandy · 11-30-2015, 07:50 AM

hmm. This is usually hpfp, unless your lpfp has had it too.

How old is your battery? It might not be delivering enough current to get everything going...

NRudy · 11-30-2015, 08:00 AM

I imagine the battery has never been changed but i doubt that to be the cause, generally the car starts first time, when running its fine, never cut out or dropped power. Once it starts its fine i can turn it off and on and it will fire up perfectly its just on occasional starts.

It feels like one of those mechanical gremlins because the main dealer nor indy can find it or replicate it.

Only reason the main dealer took me seriously is i recorded it on my phone when it did it. Managed 2 videos in a week when i caught it.

abeardo83 · 11-30-2015, 08:02 AM

Is that what we define as a long crank? 2 seconds?I'd have said 4-5secs was long, but not 2??

achu · 11-30-2015, 08:57 AM

Quote:

Originally Posted by abeardo83

Is that what we define as a long crank? 2 seconds?I'd have said 4-5secs was long, but not 2??

lol count out 2 seconds and imagine an engine turning over for that amount... it's quite long... crank should be under a second...

djgandy · 11-30-2015, 12:49 PM

Quote:

Originally Posted by NRudy

I imagine the battery has never been changed but i doubt that to be the cause, generally the car starts first time, when running its fine, never cut out or dropped power. Once it starts its fine i can turn it off and on and it will fire up perfectly its just on occasional starts.

It feels like one of those mechanical gremlins because the main dealer nor indy can find it or replicate it.

Only reason the main dealer took me seriously is i recorded it on my phone when it did it. Managed 2 videos in a week when i caught it.

Old batteries have thrown some funny issues up on these cars, including DSC faults, so I wouldn't rule it out completely. It's a long shot, but diagnosing these things is a dark art.

Swizzie7 · 12-16-2015, 10:22 PM

Interesting

hondarayblue · 12-17-2015, 03:07 AM

I had a similar issue recently. First I had the car checked for any outstanding codes, then I changed the battery to a Bosch S5. Turned out to be lazy starter the starter motor dropping voltage down to about 9.5v upon start up.

11-28-2015, 01:10 PM	#1
NRudy Private 9 Rep 94 Posts Drives: 2007 E92 335i Join Date: Apr 2015 Location: UK iTrader: (0)	Long cranks, normal??? Hey guys, I own a 2007 335i and i have had a lot of money spent trying to cure a long cranking issue. The car has never coded for it and when running seems to run fine. However on a warm start (run to operating temp then parked a few hours) ill sometimes get a 2 second crank. Ive had my coils and injectors checked, new hpfp less than 500 miles ago and major cylinder head and camshaft rebuild / replacement. Timing was checked and set too. My dealership are getting tired of me always having my car in there 7 times in 6 months or so and a total of 8-9k of work but everything but the long cranks is fixed. Do i ignore the cranks till it codes or do i press for it to be resolved? Last edited by NRudy; 11-29-2015 at 04:04 AM..
	Appreciate 0 Tweet Quote

11-30-2015, 04:27 AM	#2
Phil325i Brigadier General 639 Rep 3,218 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Typically long cranks are down to a failing HPFP. Surely the dealer will know that and could check the pump's performance? __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
	Appreciate 0 Quote

11-30-2015, 06:49 AM	#3
NRudy Private 9 Rep 94 Posts Drives: 2007 E92 335i Join Date: Apr 2015 Location: UK iTrader: (0)	My last hpfp didnt fault and was within acceptable perameters, they replaced it due to the hpfp puma case so its all new but i still on the odd occasion get a long crank. Last edited by NRudy; 11-30-2015 at 07:12 AM..
	Appreciate 0 Quote

11-30-2015, 07:50 AM	#4
djgandy Colonel 143 Rep 2,335 Posts Drives: E93 M3 Join Date: Aug 2012 Location: London iTrader: (0) Garage List 2011 M3 [0.00]	hmm. This is usually hpfp, unless your lpfp has had it too. How old is your battery? It might not be delivering enough current to get everything going...
	Appreciate 0 Quote

11-30-2015, 08:00 AM	#5
NRudy Private 9 Rep 94 Posts Drives: 2007 E92 335i Join Date: Apr 2015 Location: UK iTrader: (0)	I imagine the battery has never been changed but i doubt that to be the cause, generally the car starts first time, when running its fine, never cut out or dropped power. Once it starts its fine i can turn it off and on and it will fire up perfectly its just on occasional starts. It feels like one of those mechanical gremlins because the main dealer nor indy can find it or replicate it. Only reason the main dealer took me seriously is i recorded it on my phone when it did it. Managed 2 videos in a week when i caught it.
	Appreciate 0 Quote

11-30-2015, 08:02 AM	#6
abeardo83 Captain 97 Rep 808 Posts Drives: E92 M3 Join Date: Nov 2015 Location: Cheshire iTrader: (2) Garage List 2008 BMW M3 [0.00]	Is that what we define as a long crank? 2 seconds?I'd have said 4-5secs was long, but not 2??
	Appreciate 0 Quote

12-16-2015, 10:22 PM	#9
Swizzie7 Second Lieutenant 114 Rep 295 Posts Drives: 2009 E92 335i 6MT Join Date: Aug 2014 Location: Florida iTrader: (1)	Interesting
	Appreciate 0 Quote

12-17-2015, 03:07 AM	#10
hondarayblue Private 5 Rep 60 Posts Drives: E90 330i M Sport Join Date: Sep 2015 Location: Greenford, England iTrader: (0)	I had a similar issue recently. First I had the car checked for any outstanding codes, then I changed the battery to a Bosch S5. Turned out to be lazy starter the starter motor dropping voltage down to about 9.5v upon start up. Last edited by hondarayblue; 12-17-2015 at 01:50 PM..
	Appreciate 0 Quote