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Pinging comes and goes by samt
Started on: 05-28-2014 01:10 PM
Replies: 6 (115 views)
Last post by: rogergarrison on 05-29-2014 09:06 PM
samt
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Report this Post05-28-2014 01:10 PM Click Here to See the Profile for samtSend a Private Message to samtEdit/Delete MessageReply w/QuoteDirect Link to This Post
I've been trying to track down why my car (2.8) pings some times and not others...I've adjusting the timing,tried higher octane gas but it still pings....what I've noticed is that it doesn't do it cold and not when the cars warmed up...seems to start as soon as the car goes into closed loop and will ping until the car reaches temp....
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TopNotch
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Report this Post05-28-2014 02:19 PM Click Here to See the Profile for TopNotchClick Here to visit TopNotch's HomePageSend a Private Message to TopNotchEdit/Delete MessageReply w/QuoteDirect Link to This Post
Is your EGR functioning normally?
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rogergarrison
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Report this Post05-28-2014 02:20 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
Is it really pinging or maybe an exhaust manifold leak....
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samt
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Report this Post05-28-2014 02:29 PM Click Here to See the Profile for samtSend a Private Message to samtEdit/Delete MessageReply w/QuoteDirect Link to This Post
egr is good....thing is I'm not 100% sure it is pinging but it sure sounds like it....it's odd that it seems related to operating temp...I first thought maybe a water pump or alt bearing but you can count on it not being there cold and going away when the engine is hot...and only under load at about 3000 rpm no sign of it when I rev the engine out of gear.
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rogergarrison
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Report this Post05-29-2014 10:34 AM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post
A manifold leak can change or go away with heat.
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samt
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Report this Post05-29-2014 03:30 PM Click Here to See the Profile for samtSend a Private Message to samtEdit/Delete MessageReply w/QuoteDirect Link to This Post
but would it only be present under load? that's the hard part no noise out of gear...
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rogergarrison
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Report this Post05-29-2014 09:06 PM Click Here to See the Profile for rogergarrisonClick Here to Email rogergarrisonSend a Private Message to rogergarrisonEdit/Delete MessageReply w/QuoteDirect Link to This Post

My motorhome generator has a small exhaust leak (new part on back order). Its noisy cold with no load. It goes away when its hot, but occasionally still leaks depending on the load on it. Goes away when I take off the load. Not saying thats it in your case, but possible. Id check carefully to see. If its really pinging, the timeing or gas octane would stop it, and it would usually only do it under acceleration under high load like pulling up a hill in too high a gear.
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