M151 Oil Bath Canister - Question

[fowlercal]

Matt,
I looked for the K&N filter E-0996, last week. No suppliers had them in stock here (in San Antonio). I ordered it directly from K&N (knfilters.com) on Monday and it arrived today (Thursday). Free shipping. Price was $44.99. Will try to install it later this week.
Cal

[Rainman]

The K&N mod is an easy one, and like Raymond stated, it's not a major change in HP, but it is noticeable. I drilled the holes and did it like the Ron Reiters mod showed. I've also tried to look him up while in Hawaii, and think he may have moved back to the mainland.

[tbh726]

Hi All so i know this is an old post, but it is what i was following... So the oil in my air cleaner was the last fluid to change in my jeep.. it was only 15 years old oil...

There was sludge in the bottom in the oil when i cleaned it out, but other than that everything looked fine. The jeep ran pretty good started fine. I followed what directions were in here to clean everything up mainly with WD40. So i sprayed the steel wool container and the top real good and let it sit for a bit. Put the oil back in, looked just like some of the photos here all went back together fine. Jeep starts up fine, but when driving it seemed to struggle... and then when i pushed in the clutch to pull in a driveway it just died. It took a long start, but it started up fine, but still sounded like it was struggling.. i pulled the idle cable out about 1/4 inch and it ran fine... drove it for 10 miles or so and no problems. pulled into my driveway pushed in the idle cable and push in the clutch and sure enough it died. opened the hood and i can see the fuel filter is full of fuel so it was not starving . start the jeep back and pull the idle cable out a 1/4 inch and it drives fine into the garage...

any ideas why cleaning the oil in the air cleaner is doing this? is there still WD40 in the steel wool? just not sure why this is happening... the steel wool does look nice and clean in both the top and the both canister...

tim

[rickf]

WD-40 is a solvent and as such it should clean the filter media, kind of. It would not be my first choice. Plain gasoline is what was normally used. But with the said I don't see the WD-40 causing the lean running you are experiencing. Try backing out the idle mixture crew about 1/8-1/4 turn and see if that solves your problem. It is possible that the air filter was clogged to the point of making it run rich. Since these were set to run lean normally and now you have alcohol in the gas which makes it worse you need to richen it up a bit.

[tbh726]

Thanks Rickf will give that a try. would it help to re-clean filters with gas first so i am starting from a better baseline?

tim

[rickf]

I don't think so, clean is clean.

[svramselaar]

hi

let the engine run without the hose to the carb
adjust the idle revs
if it is OK put the hose on with running engine
there can be a little differents at idle
the cleaner the filter the less different

george

[tbh726]

thanks all for input.. finally getting to look at it again... one last question... my carb looks a bit different than the manual... think manual is newer... is this the screw i should be addressing? and turn counter clock wise?
tim

[rickf]

Yes, that is the idle mixture screw. Turn it in until the engine starts to miss or stumble and then turn it back out until it does the same thing and then turn it back in the the point between those two ends. This should be your best idle. Keep track of all your turns in and out, you should have ended up pretty close to where you started but if that emissions cap was already off of the adjustment before you got to it then it is best to set a base line like I just said to do. Now back it out about a quarter turn and test drive it. Keep doing this until it feels better but you do not want to go so far as it is stumbling at idle. If that is the case then the carb most likely needs to come off and be thoroughly cleaned or rebuilt.

[tbh726]

cool thanks... yes the cap was off... i did put a rebuilt kit in it, it was leaking pretty bad, but did not adjust mixture was hopeful and it ran great till i clean the air filter.. will give the above a try thanks..

[Cliffaliff]

Why do you want to change from the original oil bath?

[Horst]

I changed from the oil bath to the KN filter when I installed the fording kit. In my opinion the long snorkel was decreasing engine performance a little bit and the filter change compensated for that.

[rickf]

There is no doubt the paper, or K&N, will filter better and also flow better than the oil bath. As Horst said, you do lose a bit of airflow through the system with the fording kit so it might make up some of that.