ping/knock/gargle during mild acceleration
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Joined: Feb 2005
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From: Redmond, WA
ping/knock/gargle during mild acceleration
Originally Posted by DaveO
Originally Posted by DaveO
I've been running one step colder pluges in my N/A modified AT Sedan for about 1,500 miles to date. I did this because the engine occasionally knocks on a real hot day, it has always "pinged" on the dyno, the standard spark plugs looked to be running a little hot... and I needed first hand experience to develop the "Adding Spark to the VQ" article - see the Summer Issue of Sport Z Magazine.
According the the the factory service manual, my car meets at least two out of the three criteria for the "Cold" plug...
1) Spark plug knock;
2) Extended high driving;
3) Frequent high engine revolution. (sometimes)
The service manual indicates three spark plugs can be used in our VQ engine.
Standard type - PLFR5A-11
Hot type - PLFR4A-11
Cold type - PLFR6A-11
I believe the part numbers are...
Nissan #22401-5M015 = NGK PLFR5A-11
Nissan #22401-5M014 = NGK PLFR4A-11
Nissan #22401-5M016 = NGK PLFR6A-11
and the "P" = platinum. If you drop the "P" it becomes the NGK copper plug number.
I've been running one step colder pluges in my N/A modified AT Sedan for about 1,500 miles to date. I did this because the engine occasionally knocks on a real hot day, it has always "pinged" on the dyno, the standard spark plugs looked to be running a little hot... and I needed first hand experience to develop the "Adding Spark to the VQ" article - see the Summer Issue of Sport Z Magazine.
According the the the factory service manual, my car meets at least two out of the three criteria for the "Cold" plug...
1) Spark plug knock;
2) Extended high driving;
3) Frequent high engine revolution. (sometimes)
The service manual indicates three spark plugs can be used in our VQ engine.
Standard type - PLFR5A-11
Hot type - PLFR4A-11
Cold type - PLFR6A-11
I believe the part numbers are...
Nissan #22401-5M015 = NGK PLFR5A-11
Nissan #22401-5M014 = NGK PLFR4A-11
Nissan #22401-5M016 = NGK PLFR6A-11
and the "P" = platinum. If you drop the "P" it becomes the NGK copper plug number.
Sorry to bring an old thread back but in this summer heat, and even on a not so hot day but during engine heatsoak, I get some immediate light engine knock during very light acceleration. The other day I was coming up a small hill and had to stop at a light. I put it in first and proceeded through the light once it turned green. Even in first I got a tiny bit of knock/ping (more like a gargling sound) during the initial points of very average and mild acceleration. I can understand it happening in 2nd when the RPM's start out too low but 1st?
Anyway, would the post quoted above solve my problem? Anyone else experience this and try a 'cold' plug?
Thanks for the help.
Joined: Jun 2002
Posts: 30,341
Likes: 9
From: Cambridge, Ont. Canada
Could be a faulty sensor, or an air leak perhaps, but that should generate a CEL....(you'd think)......Get the dealer to look at the timing. By what you say, it is advanced too far.
G/L
C.
G/L
C.
Every single G I've see does this... I am in California and I think the oxygenated fuel around here just doesn't cut it for the rev-up VQ. I think stepping down to a colder plug is neccessary to prevent that spark knock everyone has. I just ordered a set of NGK PLFR6A-11 plugs from www.sparkplugs.com and I'll be installing them next weekend. I'll keep everyone posted on if the pinging goes away or not with the colder plugs. According to the service manual, it says
"Cold type spark plug is suitable when spark plug knock occurs with standard type spark plug under conditions
such as:
Extended highway driving
Frequent high engine revolution"
So yeah, I'm gonna give them a try and let you guys know how it turns out.
"Cold type spark plug is suitable when spark plug knock occurs with standard type spark plug under conditions
such as:
Extended highway driving
Frequent high engine revolution"
So yeah, I'm gonna give them a try and let you guys know how it turns out.
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Registered User
Joined: Feb 2005
Posts: 488
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From: Redmond, WA
Originally Posted by bythabay
Every single G I've see does this... I am in California and I think the oxygenated fuel around here just doesn't cut it for the rev-up VQ. I think stepping down to a colder plug is neccessary to prevent that spark knock everyone has. I just ordered a set of NGK PLFR6A-11 plugs from www.sparkplugs.com and I'll be installing them next weekend. I'll keep everyone posted on if the pinging goes away or not with the colder plugs. According to the service manual, it says
"Cold type spark plug is suitable when spark plug knock occurs with standard type spark plug under conditions
such as:
Extended highway driving
Frequent high engine revolution"
So yeah, I'm gonna give them a try and let you guys know how it turns out.
"Cold type spark plug is suitable when spark plug knock occurs with standard type spark plug under conditions
such as:
Extended highway driving
Frequent high engine revolution"
So yeah, I'm gonna give them a try and let you guys know how it turns out.
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