Smiley

Feedback please on the Pinging/Knocking under load between 2-3K RPM. Sounds like the typical marbles rattling around in the cylinders. Same sound my 99 Durango made when the plentum gasket sucked itself in. Just finished my first tank full of Chevron Techron and still have a rattling valve ping under load after the engine has heated up. Hoping the second bottle helps more. My wife makes a lot of short trips to and from work so I think at about 10K miles I probably have some build-up causing the pre-detonation causing the ping.

Welcome to other experiences and or solutions related to this only. No steering clunking and idle tick comments needed.

TINMAN080

Smiley maybe your knock sensor is bad, the computer reads predetonation and adjusts the timing to compensate for load, fuel quality, etc. Sounds like you may have a warranty problem. You shouldn't be getting ANY noticable clatter. Just a thought....

Doc_D

Crank / cam position sensor problem causing timing to be off?

TINMAN080

Doc that might cause a hard start condition, but not always....

TINMAN080

I'm just full of advice this a.m. Smiley LOL. The older vehicles with the low energy ignition systems and leaded fuel were real bad about carboning up if they weren't driven fairly briskly. The cure for one that had gone too far to be ''blown out'' by hard acceleration was to take a coke bottle full of water and ''dribble'' a little water into the carb while an assistant ran the engine at a fast idle. This cleaned the cylinders out like brand new. The new high energy ignition vehicles and unleaded fuel simply DON'T develop carbon buildup like the old engines did. Pinging and clattering is not helped by additives on these new engines as there is no buildup for them to remove. Virtually all clattering or pinging nowadays is caused by bad sensor readings....

Smiley

TINMAN,

Thanks for you straight forward comments. What you’re saying makes sense but after a tank and 1/2 with Techron additive seems I have lost the pinging between 2-3K under moderate acceleration. Tried for about 30 minutes to make it ping this evening but could not. Even pulled the E-Bake a couple notches to give it a little more load. Of course it could have been other things like bad gas but I still think something had built up on the intakes or valves to get them to rattle.

P.S. Watched a guy do the seafoam down the air hat a couple years ago on his Durango and the lady down the street called the fire department because it put out so much steamy smoke. I have never been brave enough to try it on one of my vehicles.

Thanks again

cmpmacchia

Hey glad to hear you may have sorted it out.

TINMAN080

I wonder if this techron additive also acts as a octane booster?

ResQGrnRubi

I've seen enough seafoam nightmare stories that even if they are all improper aplication issues, I just don't have the cojones.

2drREDROCK

I had a little noise from the engine,but like always your engine is telling you that the 87 octane is shit and stick in the 89 octane and the noise is gone
I have done this to all my vehicles its just not enough the camel piss they call 87 octane.
Most will say not to do it,WHY not try it out if it doesn't work them warranty it.
I find its the lifters in the engine making the noise,I switched to the 89 octane and I get a little more kick in each gear and WOW the noise is gone and runs smoother

Just my opinion,its worth the try