Help, MP9 AGY Motor timing

[Jasondj]

Hi all

My work daily needs some TLC. She is moaning a little when flooring her From about 4000rpm till limiter (I don't drive to the limiter this was just a test) she pings. Under heavy load with a few of the people that i car pool going up hill its even worse.

I did some research and apparently its very common. I dug a little deeper and some theories say the timing needs to be advanced a little bit like 6deg because of the Unleaded/Lead Replacement fuel. Is this true? Another theory is the distributor/dizzy might be kicking the bucket and is not advancing the timing but i can feel when putting my foot down in second gear at 2500rpm the car getting a little more power at around 3500-4000 rpm, like when VTEC kicks in on a Honda (I know she ain't got VTEC, only description is could think of). I can feel when the timing gets advanced the dizzy is working but i can be wrong.

TDS was done when the cam belt was changed few month ago, she is actually doing this before the cam belt change.


Any help will be appreciated.

[panic-mechanic]

For pinging you need to RETARD the timing.nnot advance it.

[Jasondj]

Thats what i also thought with my little knowledge. Ping is pre detonation and timing should be retarted.

Will retarding the timing a little take away power? I know its only a 1.4 so not doing robot to robot racing but very conservative with fuel consumption less power = higher fuel consumption or am i wrong?

[panic-mechanic]

Well yes and no. While it is pinging it actually makes less power so it might actually pick up rather than lose.

[Jasondj]

Cool, car is booked in for tomorrow so will see how it goes.

As from a mechanic point of view, what should i tell them? Timing needs to be retarded or just say its pining?

[panic-mechanic]

Dyno tuner or just a regular run of the mill mechanic.

[Jasondj]

Regular run of the mill mechi.

He is apparently very good and was recommended from a car club in Cape Town.

I can also recommend a tiler that did the job using the correct equipment but it doesn't mean the job will be done right

[panic-mechanic]

Ok so he is going to employba little bit of guesswork and younwill never know if it lost or gain power. Take him for a ride first and show him what it's doing.

[Jasondj]

Cool, will do just that

Thanks once again

[Jasondj]

Timing was at 16deg, brought it down to 6 and i was mooing like a cow, now power and then upped to 12 deg. Car feels the same on power but the pinging is gone!

Whilst standing there a guy came and asked if his Co's or Co2's(cant remember the correct phrasing used) can be set on his mp9 polo. I forgot to ask what it is so what is that he needed set?

[panic-mechanic]

16 degrees on idle at sea level?. are you sure you did the static lock to check timing with vcds correctly. IE did the rpm rise t 1500 and timing was stable?.
No you can't just set co on MP9. You need to piggyback chip it or need somebody that can modifiy and reflash a map.

[Jasondj]

He did plug in something by the ash tray. Not sure what is located there.

Sent from my Redmi Note 4 using Tapatalk

[Jasondj]

Can't recall on the idle speed though, i was in the waiting area.

Sent from my Redmi Note 4 using Tapatalk