Q4 igniton cut

SSQ4 · 13-07-07, 12:27

I will give it a go in the weekend. Maybe it could be that this is the problem and that the pierburgvalve is ok!? i cross my fingers

dutchy · 13-07-07, 19:02

I changed the hose by removing the map sensor.
If you remove (i believe 2 bolts) the bracket from the relay assembly, the map sensor will come off to.
See also section 5 of the Q4 ignition manual.

It's a bit fiddeling to get the hose connected to the manifold, but it doesn't have to be removed.

Good luck

Ruud

**Jan** · 14-03-10, 19:33

Originally Posted by axaQ4

Hi!

I have a certain problem with my Q4

When i step on the throttle hard the car feels like the ignition is being cut(the car quit pulling for a sec) and there are "bangs"from the exhaust.It's very disturbing becouse i cant enjoy the car at its best.The most cut and bangs happens in 3. 4. and 5. gear thats the tricky part....i guess if the cables were bad this would happen in all gear....am i wrong?

I've already changed the igniton coils(or something like that...those 2 things
on which the spark plug cables are attached on....i'm not sure if coils is the right english term so i rather wrote a description

)

My next step is to change the spark plug cables i guess....

I have this problem too, cutting ignition in higher gears.
it appeared when i changed the chip
spark cables are new, because i had the problem earlier
with the new cables no problems untill i changed the chip
spark plugs are new.
does anybody now what it can be, maybe coil packs who cracked?
which spark do i need with chip and other manifold en loose exhaust to the back?

**Jan** · 16-03-10, 20:36

anybody with an answer, ignition cuts are very anoying!

(don't now if anoying is allright?)

**Brul(tm)** · 17-03-10, 05:29

Originally Posted by Jan

anybody with an answer

Originally Posted by Jan

I have this problem too, cutting ignition in higher gears. it appeared when i changed the chip

I think you have given your own anwser?
Who made the chip you mounted in the ECU?
I know that removing all kat's and silencers except the back box from the exhaust can lead to problems you describe. In this case the solutions was reprogramming the ECU/chip on a rolling road.

First thing to check, is putting back your original chip and see what happens.

I had problems wuth excessive boost problems after replacing the turbo. In my case the waste gate didn't open. Is the pierburg correctly connected? Could also lead to boost problems.

Replacing the chip was the only service you did?

Regards,
Marc