Pinging under partial throttle

[stuntjunkie199]

I had a similar problem a few months ago. The idle "hung" high until the wheels came to a stop. I thought it was in the he throttle linkage/ cable assembly but it turns out the IACV was defective. I cleaned it first, no change. Then I cut a piece of cardboard and blocked the air flow from it. Fixed the problem right away. You could test it like that in just a few minutes. Don't take completely off just loosen it up enough to get the cardboard in behind then tighten back down. I'd bet this will take care of it.

[niles]

Great writeup Vanilla.

I know it's been a while but did you figure this out? I am experiencing very similar issues right now and am early-on in the troubleshooting phase. I can't use regular gas or it's ping-city! I've gone full retard on my timing too.

[Jacques]

If you have a aluminum intake tube, like most do for a pod air filter, they can cause a harmonic that sounds like a ping. The sound is usually at over 3000 rpm. Just food for thought.

[Vanilla Sky]

I got it fixed, but I forget what fixed it. The motor blew in that car, so it's been parked for a little over a year now.

[Dr_Snooz]

I got it fixed, The motor blew

Oh! Great fix, VS!

[Vanilla Sky]

Well, I haven't had a single idle problem out of it in over a year.

[niles]

I will add blowing the motor to my list of possible remedies

For me, full-retard and premium fuel is working for now.

[2oodoor]

Great writeup Vanilla.

I know it's been a while but did you figure this out? I am experiencing very similar issues right now and am early-on in the troubleshooting phase. I can't use regular gas or it's ping-city! I've gone full retard on my timing too.

possibly an intake valve or two not seating well, or small head gasket leak not totally rearing its ugly head yet.. not much that hasnt already ready been covered in this thead regarding causes for ping or preignition and or preignition symptoms. Anything that is making the engine run hotter than usual too. No way in he11 would I run full retard, I would have to fix whatever the issue, that would annoy me to want to blow it up...hesi hesi heh heh hesitation

[2oodoor]

Well, I haven't had a single idle problem out of it in over a year.

that is hilarious dude, the comment not the other thing...

[g.frost]

Before you pull too many parts or hairs out, Put a full dose of PEA based detergent through the gas tank. (Like Redline SI-1)
Clean out combustion deposits that cause pre-ignition. Get it fully warmed and do some full throttle spirited driving to burn the crud out. Don't bother with stuff like MMO for this treatment; PEA is the best chemistry for this.