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Discussion Starter · #1 ·
On acceleration of mostly 2/3/4 there is a pinking sound going on so the garage think it is.
they told me to use shell v power in stead of supermarket fuel and that might fix it if not might be a knock sensor all guessing.

I'm waiting to run the tank down before trying that just wondering if there a known issue to cause this ?

its the xe1 engine petrol 85k (zafira b petrol)

Serviced a year ago.

Spark plug tips are white. Oil level fine.
water pump working
aux tensioner has no play

I scanned some live data that may help change the file extension from .txt to .csv to view

With any luck someone who understands what to look for in live data may be able to find out whats up.

I've filled up with shell v power (97 octane) and done about 13 miles and has made no difference.

The only fault code is for a brake light switch which the local garage said to ignore as the brake lights work.

Appreciate any help.
 

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Discussion Starter · #2 ·
Changing the brake light switch sadly didn't make any difference.

Changed the spark plugs this morning and took if for a 20 min drive and its slightly better.

Considering changing the plugs helped a bit I wonder if the fault lies within the coil pack on the verge of going but under the threshold to trigger a engine light.

That said I don't want to chuck parts and money at it. The plugs needing doing well in August, but there about and the brake light switch as well.

I'm wondering if anything seem stands out for my last two posts that may help.
 

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sometimes carbon build up, inside the cylinder head and on the piston crown, can raise compression up, enough to cause pinking, but from what ive noticed, it usually throws a code up for cat efficiency, half the time, so probably not that, hence why the higher octane fuel didnt make any difference. its best to run on that 99 stuff tho, as those engines are high-ish compression.

how long since the fuel filter was replaced ? or it does it not have one ? cant remember on those.

timing out can effect it too, but youd probably notice that, as the car would be down on power, and probably run crap.

sorry, theres way too much stacked data in those text files, to make any sense out of. id need to see it on screen/graphs myself.

talking of crank sensors, i know post 2000 vauxhalls have been a bit funny with aftermarket crank, and cam, sensors, the ecu's prefer genuine ones of those 2 especially, to operate well. aftermarket coils can sometimes cause issues too, and different types of spark plug sometimes.

might be worth checking the whole inlet / intake side, for any air leaks too, as that can sometimes throw the fueling off, under load.

check breather pipes, and fuel tank vapour lines too.

strange how its only throwing brake pedal switch code. youd expect it to throw some other codes, if its pre detonating.

those zafira B's have a common issue with the air con lines, vibrating against the body as well, so check theres plenty clearance around the pipes / lines, as that could cause a random tapping / knocking
 

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Discussion Starter · #4 ·
So after changing the plugs is made a bit of difference, not as easy to pink but still there.

I decided to shoot the parts cannon at a new delphi coil pack as I had a haas one which I've read can cause issues on this engine. That made no difference. pffft.

New air filter was put in as it was due, not in too bad a condition.

Two new delphi wishbones as well, a bush was detached did wonder if that could be the issue of the noise but not that. All these things needed doing except the coil pack which was just a shot.

local usual garage said they haven't got a clue and suggested going to vauxhall, who said it will be £110 to look at in end of August. The garage mentioned the drop links twist left and right without much force but not knocking/worn on the ball joint. They don't make the noise I have he said.

He said he's fairly sure it must be engine related but doesn't sound like transmission issues. He said he would expect a pre detention error code or something but nothing is there.

Or I could save that diagnostic fee and put it towards to egr channels and hope for the best. He said his diagnostic machine says the egr gasses are flowing. I did wonder if its flowing enough or partially blocked.

He mentioned the knock sensor was reading ok.

Had a look at my egr valve and it looks like one of the bolt is stupidly corroded and will crumble literally coming off, did think maybe worth cleaning that.

Just thought I'd post an update.
 

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Discussion Starter · #5 ·
sometimes carbon build up, inside the cylinder head and on the piston crown, can raise compression up, enough to cause pinking, but from what ive noticed, it usually throws a code up for cat efficiency, half the time, so probably not that, hence why the higher octane fuel didnt make any difference. its best to run on that 99 stuff tho, as those engines are high-ish compression.

how long since the fuel filter was replaced ? or it does it not have one ? cant remember on those.

timing out can effect it too, but youd probably notice that, as the car would be down on power, and probably run crap.

sorry, theres way too much stacked data in those text files, to make any sense out of. id need to see it on screen/graphs myself.

talking of crank sensors, i know post 2000 vauxhalls have been a bit funny with aftermarket crank, and cam, sensors, the ecu's prefer genuine ones of those 2 especially, to operate well. aftermarket coils can sometimes cause issues too, and different types of spark plug sometimes.

might be worth checking the whole inlet / intake side, for any air leaks too, as that can sometimes throw the fueling off, under load.

check breather pipes, and fuel tank vapour lines too.

strange how its only throwing brake pedal switch code. youd expect it to throw some other codes, if its pre detonating.

those zafira B's have a common issue with the air con lines, vibrating against the body as well, so check theres plenty clearance around the pipes / lines, as that could cause a random tapping / knocking
I think the filter maybe built in to the tank on this car as I've never replaced it.

I don;t think its the timing as it runs fine other than th epinking, power seems ok too.

Crank and cam sensors never been touched.

One thing I noticed today after the air filter change maybe even before I can't be sure is when you press the gas pedal theres a little gasp or pus of air.

Not sure where the breather is on this or how to find it or the vaopur lines.

I'll have a check of the air con pipes.
 
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