TCCoA Forums - View Single Post - Chasing that pinging/rattling

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post #25 of (permalink) Old 04-17-2017, 07:17 AM Thread Starter
Natesriv
4th Gear Poster
 
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Join Date: Dec 2016
Location: Kansas City
Age: 47
Posts: 345
Garage
Well, I'm stumped!
It doesn't ping when the engine's cold. It'll ping when it's fully warmed up. It's not over the top, but you can hear it in the background at about 3/4th throttle, like going up a hill & such.

I've set the timing to 10° spot on..it advances.
My balancer looks fine
New EGR and ACT
New plugs, wires & fuel injectors
New PCV and cleaned PCV mesh
Separated plug wires 2 & 4 and 7 & 8 on wire looms

Not sure what it could be I hear possibilites
1: valve clatter
2: manifold cracks
3: vacuum leaks

I've no evidence to support any of those... 98% of time the car runs just fine...it's just those press the throttle moments...

aaargh!
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