Skyline Pinging?

[skyl1ne r33]

hey all.

my skyline is pinging around 2000rpm threw to about 3000rpm dose any one have any idea what could cause this i have changed plugs. running v power. put some octane boost in. im thinking possable the timeing as put it on comp an the timin angle is 5%.7

thanks

martin

[evil_weevil]

ECU upgraded or tuned? If so, what has been done?

[skyl1ne r33]

car is stock. just a back box. put octane boost in fule tank has quitend it down a bit. going 2 gt timein belt done this week.

[JAS-25T]

is your base timing correct?

[skyl1ne r33]

nt sure. its set at 5% and it says 15% on sticker under bonnet. but i was told i would blow engine if it was set to 15%

[JAS-25T]

degree's not %.

if you car is totally stock and the stock setting is at 15 degree's why would it blow your motor?

Your information source may be a bit poor.

[skyl1ne r33]

yer i think he ant intrested in helpin me it come up 5 degrees on snap on comp. i gona take it 2 a nissan dealer 4 timeing belt to be changed and get it all re timed 2 corect angle.

[JAS-25T]

Hey Martin, We could try and help you a bit better if we could understand what you are trying to ask.

I suggest getting a mechanic (possibly not a nissan dealer) who is a skyline specialist to do the work. They will have the experience to help you out with what you need.

[skyl1ne r33]

i just wounderd if any one had experinced the same or similer prob.its hard to describe exactley wat its doin inless u drive it.

would you recomend anywere or no anyone in newcastle area??

thanks for all the advice.

martin

[JAS-25T]

Martin,

Sorry I wasn't clear.

It's not that we can't understand your issue, more so your grammar and spelling.

I personally can't suggest anyone from newcastle area as I am not from there but I'm sure there are a few guys here that can help out.

[Abo Bob]

Go and see Nathan at Mt White.

[skyl1ne r33]

do u have a number for him??

[Abo Bob]

No but I bet someone will be along shortly to tell you. A number of people on here use him.

[TTT]

Isn't GuiltToy from these forums from newcastle?

He seems to know how to spell skyline.

[siddr20]

15 degrees is what the timing should be at.

If its at 5 degrees, deff get it checked out by a mechanic who looks after imports.

Dont go to nissan as they will charge you thru the roof and probably wont know what to do since they dont work on skylines everyday like other work shops..

Or you could do it yourself and perhaps borrow a timing gun from someone to check.

Edited July 1, 2008 by siddr20

[Kinks]

My car is totally stock save for a nismo rear muffler and I have my boost solenoid on a switch. If I run 7psi down low it also pings at about 3000RPM.

Higher octane fuel helps, I've also heard that a better exhaust will improve cylinder scavenging and might help this problem.. planning to do it anyway so will see if it helps.

Already checked ignition timing, changed fuel filter, and fitted 1 heat range colder plugs and makes no difference.

[Abo Bob]

Turbo cars have no scavenging effect afaik. I don't think that's normal if you use 98 octane fuel Geoff. I wouldn't put anything less in a Skyline.

[siddr20]

kinks- your car shouldnt be pinging like that.. deff get it checked out

whats your timing like? What plugs you running and at what gap?

[Kinks]

Always used 98RON, I wouldn't use anything less either. It is definitely happier on 100RON.

Timing is 15 degrees, plugs are NGK BK6RE something somethign.. i think the standard heat range is 5 so it's 1 colder. Standard 1.1mm gap.

I have used consult software to try richening the mixture or retarding the timing, and in both cases when I get it to the point where pinging stops the car is running like a dog. So I just leave the boost switch at its normal value so I'm only running 5psi in the midrange and 7psi up top (which it is fine with).

I am thinking that a new exhaust/cat will provide less restriction and hopefully push my load points a bit further which will make the ECU richen things up slightly. I think "taking it somewhere" will only produce one of two outcomes - they will retard my timing further making it run like a dog or recommend a PFC which is a logical (but expensive) step. Really the only thing I haven't tried is replacing the fuel pump, and I don't think that's the problem because the pinging is worst in the midrange.

[Abo Bob]

I had strange pinging in the midrange and took it to Mark at Hills. He put an oscilloscope on it and found a dirty earth signal was interfering with the CAS signal and causing it to randomly jump to 40 degrees advances.