Power Hesitation in mid range (amongst other things)

ticki · Post by **ticki** » Thu Jul 10, 2008 12:40 pm

Hi all

Power hesitation in the mid range, it feels like 1 or 2 cylinders are not firing correctly. Any ideas?

tegwin · Post by **tegwin** » Thu Jul 10, 2008 1:17 pm

Whip the plugs out....make sure they are all the right colour....

Then replace the plugs....replace the HT leads, and possibly the coil pack....that should solve it

Having said that...

At around 4K RPM the variable valve timing opens up....so you will get a bit of a bump then more power......Is that what it is?

ticki · Post by **ticki** » Thu Jul 10, 2008 1:36 pm

tegwin wrote:Whip the plugs out....make sure they are all the right colour....

Then replace the plugs....replace the HT leads, and possibly the coil pack....that should solve it

Having said that...

At around 4K RPM the variable valve timing opens up....so you will get a bit of a bump then more power......Is that what it is?

i have checked the spark plugs, they all seem in very good condition, except they are not all the same colour, they where changed at the service before last 10 months ago. by VW

ticki · Post by **ticki** » Tue Jul 29, 2008 1:54 pm

OK

VW diagnostic completed (No faults found)

then

Spark plugs replaced
HT leads replaced
Coilpack replaced
Air filter cleaned
Inlet Manifold cleaned

I still have this problem. At stand still when i build up the revs, the engine (especially in the low midrange) begins to shudder/vibrate, and the exhaust pops (not loud thou) randomly.

On the road the car feels like its only running only 100bhp.

Please help

sorted · Post by **sorted** » Tue Jul 29, 2008 2:06 pm

Altenator?

ticki · Post by **ticki** » Tue Jul 29, 2008 2:54 pm

sorted wrote:Altenator?

explain that one please?

sorted · Post by **sorted** » Tue Jul 29, 2008 4:35 pm

ticki wrote:
sorted wrote:Altenator?
explain that one please?

Mine went on Thursday, and it was sputtering and juddery on the way home - so though maybe you should have a quick squint at yours!

Did you do the normally strip down the TB and give it a good clean?

kinder · Post by **kinder** » Tue Jul 29, 2008 5:59 pm

yer i agree i had a similar prob a few months ago and it was the tb needed cleanin and setting up as it was set too high

ticki · Post by **ticki** » Tue Jul 29, 2008 11:00 pm

pologti76 · Post by **pologti76** » Wed Jul 30, 2008 12:06 am

Throttle Body

ticki · Post by **ticki** » Wed Jul 30, 2008 11:49 am

Oh dear something else is happening now, might be related. when I take my foot off the throttle, the revs take longer to die down. any ideas?

ticki · Post by **ticki** » Wed Jul 30, 2008 11:50 am

sorted wrote:
ticki wrote:
sorted wrote:Altenator?
explain that one please?
Mine went on Thursday, and it was sputtering and juddery on the way home - so though maybe you should have a quick squint at yours!

Did you do the normally strip down the TB and give it a good clean?

I didnt strip it down.

chrischap2003 · Post by **chrischap2003** » Wed Jul 30, 2008 11:51 am

It does sounds Throttle Body related :-s

ticki · Post by **ticki** » Wed Jul 30, 2008 11:56 am

is it easy to strip in down?

Tim_GTi · Post by **Tim_GTi** » Wed Jul 30, 2008 11:05 pm

Yeh definitely sounds like the TB needs a clean.

buy some 'carb cleaner' from halfords.

Take off your airbox/filter exposing the throttle body, give it a wipe down, the get someone to start the engine and pulse the accelerator up to 5-6k revs and down again, over and over. You'll notice the butterfly opens. Spray approx half the can of carb cleaner constantly into the TB.

When finished leave the car running, and take it for a good run. Let the VVT kick in (tip from Mr. P).

Here's a dirty and a clean Throttle Body