Golf 1.6 AKL Compression Results

**mike199025q** · 13-07-2015,10:21 AM

I got around 200-207psi on all 4 cylinders, i've read this is over the maximum psi.

Could this just be carbon build up? if so, how do i remove this? car failed its mot on emissions as it was smoking alot, so got new spark plugs(which was all carboned up). It seems to be better at the moment but just wondering on the results

Thank you

**SammoVWT** · 13-07-2015,03:55 PM

Get it scanned, and if you can read some live data. VCDS is a good investment.

**vwcabriolet1971** · 14-07-2015,12:06 AM

How accurate is the compression tester calibration ?

**mike199025q** · 14-07-2015,10:10 AM

No fault codes show

Also, it says 'dual calibrated gauge reading 0-300psi' it's a Clarke 8pc one

At the moment, the car smokes whilst being revved high but runs perfectly and idles perfectly

**SammoVWT** · 14-07-2015,10:15 AM

If its not missfiring or got a shaky rough appearance at idle, did you check your CAT? Might have worn out.

I like to be thorough with a no fault code situation. I take a step back and look at what might cause your fuel mix to richen, then check all of those things, such as O2, fuel pressure etc etc with VCDS - logging actual values and 9/10 you can spot the problem.

Sometimes sensors fail without a code as they just go out of spec or intermittent operation etc.

High rev smoke might be valve seals? I'm not an expert on this one, hopefully someone more knowledgeable may be able to help you.

Check through the usual suspects first, knock them off the list. It will help everyone whos trying to help you.

**mike199025q** · 14-07-2015,10:22 AM

Okay I'll check those things, just done a clutch an gearbox replacement on the car, before that it was stood on a drive not ran or started for over a year, been told it just needs a good run for it to clear up. I'll check those things out though.

**mike199025q** · 14-07-2015,02:11 PM

I did another compression test whilst the engine was warm, 150 on all cylinders give or take 2 or 3

**zollaf** · 14-07-2015,02:18 PM

the actual figures from a compression test are rather meaningless on the whole, what you are looking for is a discrepancy, one or 2 much lower than the rest. your engine would seem to be in fine fettle. what did it actually fail on, i.e. what are the readings from the emissions test.

**mike199025q** · 14-07-2015,02:33 PM

I've just checked and it doesn't say it on the refusal sheet, he said the smoke from the car blocked his emission test pipe up, car has been stood for over a year and only smokes when it's warm

**Crasher** · 14-07-2015,03:36 PM

The AKL is bad for burning oil causing the lambda sensor to shut down and the whole system fills up with carbon. When the lambda sensor shuts down, so does that cat which then cannot remove the blue smoke from the exhaust which is why you see the smoke when it is hot. Sometimes this oil burning can be the valve oil seals due to worn guides but mostly it is due to worn piston rings and I have seen many 1.6 and 2L 8v Golf 4 platform cars go to the breakers recently because of this including a 2002 1.6 Beetle.