Missing and backfire - Page 4

BADCSL · 08-01-2013, 07:06 PM

ok guys. the coil packs have been replaced and one plug...
technician test drove the car and the misfire is gone but now the car begins to jerk
he now suspects that the inlet manifold flat is jammed.
can this flat get jammed and cause the jerk.
what would be the next step.

Equinox · 08-01-2013, 07:24 PM

Get them to check the compressions

BADCSL · 08-01-2013, 07:36 PM

Quote:

Originally Posted by Equinox

Get them to check the compressions

cool, will do

Bounce · 08-01-2013, 07:47 PM

Quote:

Originally Posted by Equinox

Get them to check the compressions

You've changed your tune

Equinox · 08-01-2013, 08:03 PM

Quote:

Originally Posted by Bounce

You've changed your tune

if i say anymore power will go to peoples heads and they will come for me

shane@mbtech · 08-01-2013, 08:21 PM

Quote:

Originally Posted by BADCSL

it was the coil packs and one dead plug

Quote:

Originally Posted by AlexGTT

Did they compression test it as well?

Quote:

Originally Posted by Equinox

Why would you need to do a compression test if the coils sorted it out ?

Quote:

Originally Posted by lawsy

Because those of us with experience do a thorough job.

Quote:

Originally Posted by Equinox

So whenever you get a car in with a misfire you check the compressions, bit pointless.

Quote:

Originally Posted by lawsy

Really.

Well I was trained correctly, and dont just replace parts because you think they need replacing.

Everyone thinks these computers tell you the cause. They read fault codes, that is the effect. I find the cause.

To do a compression test on a car takes no time at all. And knowing the s54, a compression test is a good idea.

Quote:

Originally Posted by BADCSL

ok guys. the coil packs have been replaced and one plug...
technician test drove the car and the misfire is gone but now the car begins to jerk
he now suspects that the inlet manifold flat is jammed.
can this flat get jammed and cause the jerk.
what would be the next step.

I'm saying nothing

Bounce · 08-01-2013, 08:24 PM

Quote:

Originally Posted by lawsy

I'm saying nothing

Thats not like you

Equinox · 08-01-2013, 08:30 PM

Well done youve passed your level one in using the quote facility.....

ill get my coat and leave now... !

**AlexGTT** · 08-01-2013, 08:36 PM

Quote:

Originally Posted by lawsy

I'm saying nothing

Neither am I.

NZ_M3 · 08-01-2013, 08:56 PM

Did you scan the car? Did it come back with any fault codes? If so what are they?

I am suspecting it might actually be the vanos control unit that sits under the vanos. The connections on those crack after a while through vibrations and heat cycles - you just need to open it up and resolder all the joints and it should be fine.

Would usually throw multiple codes for misfires and 2 vanos related codes.

08-01-2013, 07:06 PM	#31
BADCSL Wonky 'L' after Washing Join Date: Mar 2009 Posts: 16 Casino cash: $334	ok guys. the coil packs have been replaced and one plug... technician test drove the car and the misfire is gone but now the car begins to jerk he now suspects that the inlet manifold flat is jammed. can this flat get jammed and cause the jerk. what would be the next step. Last edited by BADCSL; 08-01-2013 at 07:26 PM.

08-01-2013, 07:24 PM	#32
Equinox S5, Sport Off, DSC M-track Join Date: Feb 2012 Posts: 554 Casino cash: $5666	Get them to check the compressions __________________ '03 E46 SG CSL #084 '84 CAPRI 3.7 V6 '13 DISCOVERY 4 HSE '91 NOVA GTE '16 HONDA TRX500 QUAD

08-01-2013, 08:30 PM	#38
Equinox S5, Sport Off, DSC M-track Join Date: Feb 2012 Posts: 554 Casino cash: $5666	Well done youve passed your level one in using the quote facility..... ill get my coat and leave now... ! __________________ '03 E46 SG CSL #084 '84 CAPRI 3.7 V6 '13 DISCOVERY 4 HSE '91 NOVA GTE '16 HONDA TRX500 QUAD

08-01-2013, 08:56 PM	#40
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	Did you scan the car? Did it come back with any fault codes? If so what are they? I am suspecting it might actually be the vanos control unit that sits under the vanos. The connections on those crack after a while through vibrations and heat cycles - you just need to open it up and resolder all the joints and it should be fine. Would usually throw multiple codes for misfires and 2 vanos related codes.