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Model specific boards => Golf mk4 => Topic started by: Immortal on 30 March 2013, 16:50

Title: Stop, for the love of all that is good & holy: STOP!
Post by: Immortal on 30 March 2013, 16:50
Just had a heart in the mouth moment.

I briefly lost power assist on my brakes  :shocked: Luckily I was only doing about 5mph, but I still sh@t myself!

The engine is still running like a bag of spanners & idling around 500rpm, it seems to be related...

Anyone got any bright ideas?
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: barrym381 on 30 March 2013, 16:54
coil-pack not working right  :smiley:
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Immortal on 30 March 2013, 17:08
Possible, but had it on VAGCOM last week & it was only saying temp sensor

Sounds like a tractor atm
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: barrym381 on 30 March 2013, 17:14
Quote from: Immortal on 30 March 2013, 17:08
Possible, but had it on VAGCOM last week & it was only saying temp sensor

Sounds like a tractor atm
have you had the car long  :smiley:
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Immortal on 30 March 2013, 17:48
Quote from: barrym381 on 30 March 2013, 17:14
have you had the car long  :smiley:

About 6 years :cool:
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: barrym381 on 30 March 2013, 17:52
Quote from: Immortal on 30 March 2013, 17:48
Quote from: barrym381 on 30 March 2013, 17:14
have you had the car long  :smiley:

About 6 years :cool:
get your coils done under recall just phone vw give them your reg see if they are covered
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: topher on 30 March 2013, 19:10
check the pipes under the inlet manifold and the hose to the brake servo
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Wazzzer on 30 March 2013, 20:18
With Topher on that, my mate recently had a hole in his brake booster pipe near the servo. Gave him a brown pants moment on the motorway at 70
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Immortal on 30 March 2013, 22:10
Ill take a look in the morning. Thanks guys
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Dalo Harkin on 31 March 2013, 08:46
The pipe to the servo comes off the inlet manifold, it'll be split somewhere ....

If the coil packs were knackered it would sound like a Subaru, start the car and unplug the harnesses to the coil packs one by one, you should get a drop in the engine if it's ok, if you unplug one and it does nowt it's buggered, I had one let go last year bought a full set to replace with so still have 3 working one's here...... :wink:
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Immortal on 01 April 2013, 12:58
A little experimenting has lead me to the cause.

Checked & double checked the hoses leading to the servo (all ok). Then decided to do the good old test on it: engine of & pump the break till the vacuum is exhausted, then holding the pedal down turn the ignition on, pedal should give as the vacuum builds up. Which it did until the revs dropped to 500rpm.

So the good news is that it is the engine speed that's the cause. The bad news is I've being fighting this rough running for a while...
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Chris#101 on 01 April 2013, 13:00
any fault codes?

have you tried unplugging the maf to see if it runs any better?
Title: Re: Stop, for the love of all that is good & holy: STOP!
Post by: Immortal on 01 April 2013, 13:04
Yes I have, I did it several times & it's hit & miss. Meaning sometimes it runs sweet without the MAF but not always