At 80K should I be thinking about ....

[Moab]

Spark Plugs?
I know some of these newer vehicles say 100K but I'm thinking at 80K couldn't hurt...Right?
Anyone change there plugs yet in there KJ?

 

[Marlon_JB2]

Spark Plugs?
I know some of these newer vehicles say 100K but I'm thinking at 80K couldn't hurt...Right?
Anyone change there plugs yet in there KJ?

Ours get changed every 20k. Jeep recommends them every 30k.

 

[kj924]

I changed mine out at 50K and they needed to be changed at that time.

 

[Moab]

I just don't have any history on this vehicle but it rides and runs excellent.
I just changed all the fluids in all the cases and just trying to get it up to a point to feel confident for some trips. I'm probably going to pull a plug next week and see what it looks like. It does run very smooth and well though.

 

[ThunderbirdJunkie]

At 80k you should be concentrating on fluid replacement spark plugs and the next 220,000 miles

 

[LibertyTC]

Them kj coils run pretty hot and eat plug gaps. I changed mine at 25k and the gap was much larger than spec. You will find better fuel economy with the new plugs installed.
I also would consider getting the dealer to do a cooling system flush and new thermostat.
Best o luck and happy Kj motoring.

 

[ptsb5a]

For what they cost, swap the plugs. And don't go for those ultra high zoot iridium things either. KJ's coil packs cannot generate enough of a spark to take advantage of them.

Too bad MSD or Accel don't yet make replacement "high-energy" coils yet. Had alot of good times with the MSD 6AL/coil/dist on my Chevelle.

 

[Moab]

All Fluids done but I'll change engine oil when I do the plugs.
Thanks for the help.

 

[twack]

before you pull the old plugs run a can of seafoam through the engine, it will clean it out and its ******* the plugs so its best to do it with a pair of ones you will toss away

 

[Moab]

What is Seafoam? Engine flush, cleaner??

 

[flair1111]

i change at every 15k.

 

[kj924]

What is Seafoam? Engine flush, cleaner??

Yes. I have never used it, but lots of people on here have. It's basically a cleaner that you inject into the intake air while the engine is running and it supposedly cleans the combustion chamber, valves...ect.

 

[Moab]

Thanks for the explanation. Never heard of the stuff.

 

[TAwesome]

In my opinion worth it for sure. One of the few cleaning products I have found that actually does what it says it will do. Just don't get crazy with it or you'll stall your engine its a bit of a balancing act.

 

[Moab]

Thanks for the advice

 

[JeepINgeek]

ive put seafoam in my fuel too

i hear you can shove a vacuum tube from your engine in there and itll suck it up and clean stuff..

ive also heard they make it for trannys and stuff

its magical and works.

 

[Vtolds]

Proper way to use seafoam is to put a 1/3 of the can into the gas. Put a 1/3 in the oil, then drive it for 10 to 20 miles. Run the last 1/3 into the brake booster vacuum line, have a friend rev the motor so it does not stall. Shut the car off for 5 minutes then turn it back on. It will puff smoke out the exhaust depending on how much carbon is in the motor (could be a lot, could be none). Replace your oil immediately after doing this or risk damage to the motor.

I just passed 94,000 miles and I have been slowly replacing things. I did my spark plugs, my front and rear diff oils. I just did a full brake job. Next week I have a new exhaust coming because the old one has a hole in the muffler. Transfer Case and Transmission will come before winter.

 

[Moab]

Proper way to use seafoam is to put a 1/3 of the can into the gas. Put a 1/3 in the oil, then drive it for 10 to 20 miles. Run the last 1/3 into the brake booster vacuum line, have a friend rev the motor so it does not stall. Shut the car off for 5 minutes then turn it back on. It will puff smoke out the exhaust depending on how much carbon is in the motor (could be a lot, could be none). Replace your oil immediately after doing this or risk damage to the motor.

I just passed 94,000 miles and I have been slowly replacing things. I did my spark plugs, my front and rear diff oils. I just did a full brake job. Next week I have a new exhaust coming because the old one has a hole in the muffler. Transfer Case and Transmission will come before winter.

How was the spark plug change?
That's what I have planned for next month along with a synthetic engine oil change and filter.

 

[tjkj2002]

Proper way to use seafoam is to put a 1/3 of the can into the gas. Put a 1/3 in the oil, then drive it for 10 to 20 miles. Run the last 1/3 into the brake booster vacuum line, have a friend rev the motor so it does not stall. Shut the car off for 5 minutes then turn it back on. It will puff smoke out the exhaust depending on how much carbon is in the motor (could be a lot, could be none). Replace your oil immediately after doing this or risk damage to the motor.

Actually not really true,one way it can be done,no real right way or wrong way.

The actual purpose of sucking it in through a vacuum line is not to clean the carbon on the valves since any injector cleaner added to the gas tank does this,but to actually clean the carbon that builds up in the actual intake itself.Since multi port injection came around we now have what is called a "dry" intake,that means no fuel travels through the intake,only air.This leads to some serous carbon issues that build up after the engine is shut off.This problem does not occur in vehicles with carbs or TBI injection since they use a "wet" intake were actual gas will travel through the intake along with the air.

The best way to inject SeaFoam through a vacuum hose is with one of these(scroll to the bottom of the page)..............

http://www.edwardsracingengines.com/qmi.html

You must be registered for see images

and use the whole can while the engine is running and keep it running till the smoke clears out of the tail pipe,keeping the engine rpm's at about 1500-2000 after the cleaner is totally injected will help clear the smoke faster.

 

[Moab]

Actually not really true,one way it can be done,no real right way or wrong way.

The actual purpose of sucking it in through a vacuum line is not to clean the carbon on the valves since any injector cleaner added to the gas tank does this,but to actually clean the carbon that builds up in the actual intake itself.Since multi port injection came around we now have what is called a "dry" intake,that means no fuel travels through the intake,only air.This leads to some serous carbon issues that build up after the engine is shut off.This problem does not occur in vehicles with carbs or TBI injection since they use a "wet" intake were actual gas will travel through the intake along with the air.

The best way to inject SeaFoam through a vacuum hose is with one of these(scroll to the bottom of the page)..............

http://www.edwardsracingengines.com/qmi.html

You must be registered for see images

and use the whole can while the engine is running and keep it running till the smoke clears out of the tail pipe,keeping the engine rpm's at about 1500-2000 after the cleaner is totally injected will help clear the smoke faster.

Thanks for the tip and explanation