Missing and backfire

[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.

[Equinox_csl]

Get them to check the compressions :bigcry:

[BADCSL]

Get them to check the compressions :bigcry:

cool, will do:bigcry::bigcry::bigcry::bigcry::bigcry:

[Bounce]

Get them to check the compressions :bigcry:

You've changed your tune:hahaha:

[Equinox_csl]

You've changed your tune:hahaha:

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

[shane@mbtech]

it was the coil packs and one dead plug

Did they compression test it as well?

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

Because those of us with experience do a thorough job.

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

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.

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:smokin:

[Bounce]

I'm saying nothing:smokin:

Thats not like you:hahaha:

[Equinox_csl]

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

ill get my coat and leave now... !

[AlexGTT]

I'm saying nothing:smokin:

Neither am I.

[NZ_M3]

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.

[shane@mbtech]

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

ill get my coat and leave now... !

No, please stay, you can learn some more:notworthy:

[shane@mbtech]

And it might have nothing to do with hg and compressions.

But I would most definitely be checking them.

[BADCSL]

went to the workshop this morning.

The mac is telling me that the intake flap is jamming.

The motor on the airbox is turning the flap to open and close but when its closes then it closes to much casuing it to stick.
He made mention that the shaft that holds the flat could be worn out causing it to stick.
He now suggests to remove the flap and sand it down slightly to arrow easy opening and closing.

btw, the computer is no longer showing any faults after changing the coil packs from Bremi to Bosch. told them to change all the plugs as well.

hope this works out...

[alexk]

Did you do the compression test ?

I don't see how a stuck flap would cause misfires to the engine.

[BADCSL]

Did you do the compression test ?

I don't see how a stuck flap would cause misfires to the engine.

its no longer the misfire. the misfire is sorted.

this is a lack of power at certain times and slight jerk.