2TR-FE Pinging

Has anyone on here had issues with their 2.7L 2TR pinging on 87 octane? I am about 2000ft above sea level and on a hot day (only when it's hot out) if i hit the gas hard in 1st or 2nd gear, i get some pinging between 3000-4000rpms. I filled up with premium 93 octane today and it seems to have eliminated the problem. Curious if anyone else out there has noticed this? I know it was a problem on some v6 trucks and there was a TSB for it. Curious if anything similar is out for the 4 bangers

Cheers,
Robert

 

Have you checked the sensor, or replaced it?

 

No sir.. probably would be a good idea after 250k..

Where is said sensor sir?

 

Occasional and/or slight pinging is normal because the computers try to maintain ignition timing right at the performance edge. This "normal" pinging should go away quickly. Also, higher mileage vehicles (like yours) tend to have some carbon buildup in the combustion chamber which can cause pinging. The fact that high octane stopped the pinging indicates that it is not a serious mechanical problem, so that is good news. You might pull a few easy access plugs and take a look with a bore-scope.

 

Interesting, im guessing the latter of the two is whats happening in mine because of age. I will have to invest in a bore-scope so i can take a peek at things. Thanks for the tip, Friend

 

Driver side of block, single bolt going through center of it

 

Ill take a look at this when it cools off, thanks man

 

If your ECM pinout looks like this, then take the resistance across pins E4-29 & E4-30 and there won't be a need to remove that dang intake.
This is for 2005-09, maybe is same for 2009? If not, get that manual and same idea applies.