Rough cold start with 35is

Ozie
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Rough cold start with 35is

Post by Ozie » Fri Nov 03, 2017 4:55 pm

Z4M-2006 wrote:
Wed Nov 01, 2017 10:09 am
Yea,

Classic HPFP problem
Thanks. Got also new symptom... :roll:

If I try to accelerate harder car starts to "shake" bit like hitting the rev limiter. No warning lights and no fault codes. Earlier got few codes from same aymptom: Instrument Cluster shutdown A559 and Motor Control - ECU 55 "sorry, unknown DTC fault" 00DE51. I mean is this also HPFP problems or something else?

Z4M-2006
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Rough cold start with 35is

Post by Z4M-2006 » Fri Nov 03, 2017 5:11 pm

The HPFP sounds like its faulting and dropping pressure,under demand the fuel pressure is dropped to the injectors and misfires start to happen.

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tomscott
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Rough cold start with 35is

Post by tomscott » Fri Nov 03, 2017 5:32 pm

Another with injector issues :cry:
67 Mini Clubman JCW
54 911 C4S vert 50:50 Share
2006 Z4Mc Gone

Z4M-2006
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Rough cold start with 35is

Post by Z4M-2006 » Fri Nov 03, 2017 6:42 pm

All "N" derived engines have injector problems...

Dont have to have double windmills on em

Ozie
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Rough cold start with 35is

Post by Ozie » Wed Nov 22, 2017 6:55 pm

HPFP was replaced yesterday. Ignition is now much faster and better. Starts after first crank. No error codes while accelerate. Total cost was about 950 €/ $1120 / £850.

Still noticed vibration when tried to accelerate uphill with 7th gear from 40 mph to 60 mph. More in here viewtopic.php?f=45&t=89585

Z4M-2006
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Rough cold start with 35is

Post by Z4M-2006 » Wed Nov 22, 2017 7:15 pm

Is it bringing EML on ?

Coil packs or vanos actuators would be my next thing..

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Smartbear
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Rough cold start with 35is

Post by Smartbear » Wed Nov 22, 2017 7:20 pm

Ozie wrote:
Wed Nov 22, 2017 6:55 pm
HPFP was replaced yesterday. Ignition is now much faster and better. Starts after first crank. No error codes while accelerate. Total cost was about 950 €/ $1120 / £850.

Still noticed vibration when tried to accelerate uphill with 7th gear from 40 mph to 60 mph. More in here viewtopic.php?f=45&t=89585
That sounds a very low speed to be in 7th & accelerating uphill, maybe the vibration is just the engine labouring at such low rpm?
Rob
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e89 Sdrive2.0 20i, plenty of mumbo & good economy-the thinking bears z4 :P
e89 Sdrive30i this ones busted, pass me another...
e85 3.0si, i foolishly sold my trouble free car...

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Rough cold start with 35is

Post by Ozie » Wed Nov 22, 2017 9:50 pm

Z4M-2006 wrote:
Wed Nov 22, 2017 7:15 pm
Is it bringing EML on ?

Coil packs or vanos actuators would be my next thing..
Nope. No codes or lights.

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Rough cold start with 35is

Post by Ozie » Wed Nov 22, 2017 9:57 pm

Smartbear wrote:
Wed Nov 22, 2017 7:20 pm
Ozie wrote:
Wed Nov 22, 2017 6:55 pm
HPFP was replaced yesterday. Ignition is now much faster and better. Starts after first crank. No error codes while accelerate. Total cost was about 950 €/ $1120 / £850.

Still noticed vibration when tried to accelerate uphill with 7th gear from 40 mph to 60 mph. More in here viewtopic.php?f=45&t=89585
That sounds a very low speed to be in 7th & accelerating uphill, maybe the vibration is just the engine labouring at such low rpm?
Rob
It's way more rough. You'll get that wtf feeling when it hits. Bit like hitting rev limiter or wheel spin dsc engadged (no dsc lights) by suprise.

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