Jeep pinging more.

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My 2002 jeep 4.0 158,000+ miles is pinging more then it use to. Would go as far as saying excessive. I think the issue maybe in the last year wife now works in town 1 mile round trip. I do take it for run once a week on a 50 mile trip but speed is not over 50. I think I am getting carbon buildup. Tried gumout regane no help. Years ago in my repair shop i would do slow slow water drip down the carburetor (remember them) and it would work. The jeep has port injection i believe. Any issues dripping down the Throttle Body. Any better ideas?? Thank you
 
Some weekend, pull the plugs and put 2oz (~70ml) of sea foam in each hole.
Start the plugs threaded in, but not tight. Don't connect the ignition coils.

Crank the engine for 5 seconds to splash it around in there, then let sit for 24 hours.
Tighten the plugs, connect the coils, then take it out for a little highway cruise.

From this point forward, add 2-cycle oil to the gas at 1oz per every 5 gallons (1:640)

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1107478/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1429603/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/2486832/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3015734/
 
There could also be water in the tank - I had an older vehicle that pinged until I put some HEET or similar to clean it out.
 
Originally Posted By: Linctex
Some weekend, pull the plugs and put 2oz (~70ml) of sea foam in each hole.
Start the plugs threaded in, but not tight. Don't connect the ignition coils.

Crank the engine for 5 seconds to splash it around in there, then let sit for 24 hours.
Tighten the plugs, connect the coils, then take it out for a little highway cruise.

From this point forward, add 2-cycle oil to the gas at 1oz per every 5 gallons (1:640)

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1107478/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1429603/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/2486832/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3015734/



I've heard of this too...
Isn't it with tcw3 2 cycle oil?
 
Originally Posted By: littleant
My 2002 jeep 4.0 158,000+ miles is pinging more then it use to. Would go as far as saying excessive. I think the issue maybe in the last year wife now works in town 1 mile round trip. I do take it for run once a week on a 50 mile trip but speed is not over 50. I think I am getting carbon buildup. Tried gumout regane no help. Years ago in my repair shop i would do slow slow water drip down the carburetor (remember them) and it would work. The jeep has port injection i believe. Any issues dripping down the Throttle Body. Any better ideas?? Thank you


Just a thought if your burning oil could be valve stem seals.
valve stem seals
 
Originally Posted By: Linctex
Originally Posted By: rollinpete

I've heard of this too...
Isn't it with TCW-3 2 cycle oil?


Yes sir...

Original thread started here, actually:
http://www.ls1.com/forums/f48/been-testing-oil-91206/


It's for some interesting reading, I've read most of it before, I just can't make myself to believe putting more oil in your combustion chamber would make it run cleaner.
 
Originally Posted By: rollinpete
Originally Posted By: littleant
My 2002 jeep 4.0 158,000+ miles is pinging more then it use to. Would go as far as saying excessive. I think the issue maybe in the last year wife now works in town 1 mile round trip. I do take it for run once a week on a 50 mile trip but speed is not over 50. I think I am getting carbon buildup. Tried gumout regane no help. Years ago in my repair shop i would do slow slow water drip down the carburetor (remember them) and it would work. The jeep has port injection i believe. Any issues dripping down the Throttle Body. Any better ideas?? Thank you


Just a thought if your burning oil could be valve stem seals.
valve stem seals
Believe it or not even at the mileage the engine burns no oil. Never had a vehicle that did not use some oil between oci.
 
Originally Posted By: rollinpete

It's for some interesting reading, I've read most of it before, I just can't make myself to believe putting more oil in your combustion chamber would make it run cleaner.


TCW-III is ashless, so leaves no deposits.

It has some type of "carbon remover" in it to help keep exhaust ports clean on 2-cycle engines.

1:640 is a pretty lean ratio
 
Inline Six is pretty easy to do piston soak. I like Break Free gun solvent overnight. It's made to help clean carbon from rifle bores. Once it has softened the carbon, it should burn off on a good highway run
laugh.gif


Can you take 1* or 2* of timing out of it? They may have switched to summer gas formula and the engine is reacting ...
 
Last edited:
Originally Posted By: Linctex
Some weekend, pull the plugs and put 2oz (~70ml) of sea foam in each hole.
Start the plugs threaded in, but not tight. Don't connect the ignition coils.

Crank the engine for 5 seconds to splash it around in there, then let sit for 24 hours.
Tighten the plugs, connect the coils, then take it out for a little highway cruise.

From this point forward, add 2-cycle oil to the gas at 1oz per every 5 gallons (1:640)

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1107478/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1429603/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/2486832/
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3015734/


Great. After some reading I may get back on the tcw 3 wagon.
 
The Jeep 4.0 valve rotators won't totate the valves under 3500 rpm. Carbon will build up on the back of the valves and the gas will soak into that,boil off and cause a lean condition. Go take it for a spirited drive. Get it wound up and see if that improves it.
 
He could have saved money and gotten same results w/o the Lucas. It was already quieter ...

In lieu of Seafoam, I like BG109 (EPR), full can 100 miles before an oil change. It'll usually get about the same results in a slightly more benign way
smile.gif
 
Originally Posted By: BrocLuno
He could have saved money and gotten same results w/o the Lucas. It was already quieter ...


Yeah, someone needs to invite "Project Farm" to BITOG!!

Then he can learn the truth about LUCAS....

I was REALLY astonished to see how dramatic this SPECIFIC ATF carbon removal test was!

Skip to 3:30
 
Run a good fuel with another round of pea and hit the highway. Maybe blowing it out on interstate will help. Grandma had a car like that..I would go to Amaco and add a fuel system cleaner and 92 octane and cruise the interstate for your. Sometimes just getting it all nice and hot helps most.
 
His mos2 test was flawed. Takes like 500 miles to cling and he didn't do that. I always saw mos2 performed best on v8 where there was more moving parts.
 
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