Experiencing odd starting experience with 35i RESOLVED!

[dario]

Over the last few days my 35i has begun to start oddly. Since i've had this car, starts first whizz of the starter and the make a beautiful booming noise until the revs settle back to normal idle.

now on occasion, its starting like a bag of spanners not growl no fast idle no boom, today i was out with the mrs and it took a couple of seconds to catch (most unusual). running is normal, no lack of urgency or power. just odd starting.

Anybody had this or have any ideas?


Dario

[pvr]

Coil? Had something similar on a VW which was the coil pack when I checked around and after I replaced it all was well.

Do you have a code reader?

[dario]

Coil? Had something similar on a VW which was the coil pack when I checked around and after I replaced it all was well.

Do you have a code reader?

As i understand it PVR the the E89 shows its error codes on the car status display and there is nothing showing.

I've got extended warranty from BMW so i'm not worried, but i have to pay for investigation works. Might wait until it developed in to a real fault so theres not fanning around.

As i said in my bit it goes straight to warp speed without one hiccough so i don't see it being a coil. I guess it to be a sensor rather than a specific device.

I did read on one american forum that one guy (his dealer) to find a fault fitted 6 x coils, 6 x injectors, 6 x spark plugs...... crikey i'm sure i could have four the problem like that!

[pvr]

What about on warm engine start? On the VW it was spanners at idle but fine during driving, hot or cold.

[dario]

What about on warm engine start? On the VW it was spanners at idle but fine during driving, hot or cold.

no, it starts fine.

If i were a betting man, i might even suggest that it might sound like fuel run back, or pressure dropping in the fuel rail.

[Stark]

Sure it's not the valve on the exhaust?

[dario]

Sure it's not the valve on the exhaust?

What make you say that Stark? do you have experience of this not opening and causing this sort of problem.

I'd rather it just went wrong and stayed that way, but we don't get a choice in these matters

[dario]

It progressed further this morning. Instead of the normal Vrooom when it starts, today with 30degrees weather and parked in direct sunlight it barely would catch and Carrie who was walking behind me god covered in a plume of black smoke. Started on second attempt but just ticked over without the Vroooom it normally does.

Goes in on Tuesday and it can stay there until its fixed.

[envy]

sounds odd. have you revved it hard to clear out some of the crap that may have built up in it??

[dario]

sounds odd. have you revved it hard to clear out some of the crap that may have built up in it??

There are no worries about this being revved hard! The taps are opened on a regular basis!!

[envy]

lol thats a good thing

[gt68]

Did you get to the bottom of the DCT knocking you mentioned a few months back?


Audi A6 3.0 TDI BE + BMW Z4 35is

[dario]

Did you get to the bottom of the DCT knocking you mentioned a few months back?


Audi A6 3.0 TDI BE + BMW Z4 35is

Ah, sorry.

I did!

They had it for weeks whilst loaning me a well specced 5 series GT Nice car, but as FUGLY as sin!!!

i had to take them out and get it to do the knocking. It took a long time with a super tech in the car and low and behold i could repeat the circumstances that caused the knocking........


They changed the HPFP and it went away

strangely it looks like they are about to replace it as they think that might be the problem with the starting issue its currently suffering from.

Dario

[dario]

Its been a quite a while that my Z4 has been suffering from poor starting. With various trips to the dealers to resolve this problem to no avail!

the problem has recently got more annoying and ultimately frustrating. It had been back at the last part of last year and the after days and days at the dealers to replicate the fault, eventually a fault code pinged a coil pack as being faulty........? I was unconvinced and repeated poor starting showed that the fault was still there.

reading the internet i recently read that some 335i owners were suffering the same problem (same engine) and their faults had been traced to leaking fuel injectors (at rest). the effect of this was to dampen the cylinder over time and cause combustion at start up to be lumpy.

I took this theory to my dealer and they took note! had a phone call yesterday to advise that they had removed the injectors and found that they were indeed leaking. They also found a further 2 coils that have pinged fault codes.

I'm preying that this problem is finally at an end for me.

this is the video i presented to the dealer to show it ran like a bag of spanners on start up.

[Stark]

I think you'd need to be there to properly hear it, because I just hear a lovely sound that reminds me of mine

Glad they are sorting it though