How-To: Eliminate 4.0 SOHC 'jolt/buck' symptons - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 01-27-2009
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How-To: Eliminate 4.0 SOHC 'jolt/buck' symptons

Okay guys. I solved my 'jolting' problem at cruising speeds.

It seems that my K&N OEM replacement filter was indeed sucking up oils from the filter media and contaminating my MAF sensor. The cure was simple enough. Clean the MAF sensor and install a dry paper filter.

Here is a pictorial How To.



Tools recommended:
Gloves - recommended for dirty engine bays like mine
Flathead screwdriver - Optional, to help with removal of MAF plug
Zip Ties - To reseal air box if the clips are broken, such as mine
Cloth - To wipe down air box and MAF
Electrical contact cleaner: To clean MAF sensor

Difficulty: 0.5 out of 5
Time: Less than 10 minutes

Step 1:
Begin by unplugging the MAF connection by pushing down on the clip with your finger or a flathead screwdriver.
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Step 2:
With the air box opened,remove the problem causing oil-based media air filter, by lifting it out of the bottom half of the air box.
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Step 3:
Show anger at cause of problem by making a fist and then raising your middle finger, making sure it is pointed at the subject.
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Step 4:
Remove new dry paper filter from box.
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Step 5:
Install new dry paper filter with the mesh side facing up and replace top half of air box.
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Step 6:
Make sure the air box is sealed tight as not to let in excess air which may also result in the continuation of the jolting symptons.
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Step 7:
Go for a test drive and cruise at 40-60mph and make sure symptons do not return.
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Step 8:
Problem solved!
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*Disclaimer* This is actually not a 100% serious how to. Actually more of a parody. However, this did solve my problem and the photographs are more for humour value. Please take this into consideration before commenting. *
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  #2  
Old 01-27-2009
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I like to use CRC Mass Airflow Sensor Cleaner on my MAF. It's completely safe on plastics.
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Old 01-27-2009
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You know Takeda is somewhere wringing his hands and laughing evily!!


VICTORY!!!!



Glad you figured out the problem.
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Old 01-27-2009
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lol,he was the one I got inspired by to do this thread. Again, this thread actually contains no technical problem solving content.
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Old 01-27-2009
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its not a good how to. doesn't show us how to clean the MAF. better for back out there for a reshoot.
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Old 01-27-2009
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I'm sure the filter did nothing. You over oiling the crap out of it is what caused the problem.
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Old 01-27-2009
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Well if I had a filter I didn't have to oil in the first place,then there never would have been a problem. However, this is about the 10th vehicle I've used a K&N filter in and the first one I've had a problem with.

However, not having to replace plugs,wires or resetting or reprogramming the PCM or doing anything else really made it a simple fix. This K&N filter is 6 years old and has over 190k miles on it. Probably about the 4th time it's been cleaned and oiled, and November was the last time it was done.
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Old 01-27-2009
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I'm glad it wasn't something serious. I get to try to convince customers of this all the time at work.
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Old 01-27-2009
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It was also significantly warmer out today than it has been. The jolting was happening mostly in the -15 and colder range.
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Old 01-27-2009
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My jolting was a cruzing speeds, as you know since we talked about it. Just put in a factory filter intoday hopefully that'll fix it. When it gets about 20's im gonna clean the mass with CRC mas cleaner but i noticed my intake tube was dirty so might was that down also and check if my TB is dirty.
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  #11  
Old 01-27-2009
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You had the same problem as me then. MAF problem, I win.
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Old 01-27-2009
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BTW broken windshield?
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  #13  
Old 01-27-2009
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Very broken. Got that in October. Gravel truck on the highway at 70mph. Stone hit the very edge of the windshield right at the piller and put a big golf ball sized crack in it and it took 2 months to spread all the way across the centre of the windshield. I'm waiting til the spring to replace it, because by then I will need to do an Out of Province inspection on my truck in Alberta when I register it there.
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  #14  
Old 01-27-2009
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How do you pass inspection?
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Old 01-27-2009
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Glad to hear your truck is good to go!
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Old 01-27-2009
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Glad i was able to help. No one likes to take my advice on here

Also, you never show yourself cleaning the MAF. I hope you didnt wipe it off, you shouldnt touch the filaments with anything.
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Old 01-27-2009
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That was pretty funny...
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Old 01-27-2009
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The k&n filter oil isnt what caused the bucking, the excessive flow of the filter causes spikes in MAF voltage which causes the buck/jerk. the stock filter evens out the air flow and stops the voltage spikes

Last edited by Toreador4x4; 01-27-2009 at 08:11 PM.
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  #19  
Old 01-27-2009
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That filter has been in the truck for 6 years with no problems until 4 days ago.

I had cleaned out the MAF prior to my little photoshoot. I wiped it out because the MAF tube was full of slime and crap.

Mark, as for inspection, my truck does not need an inspection unless I continue living in Ontario and change the ownership from my dad's name to my own. If that's the case,then I need to do safety and emissions inspection. Since I am moving out of province, I have 3 months to register the truck in Alberta,so before I move I am going to have my dad write me a bill of sale with no date,so that when I go to register it in Alberta, I change owners there and then do an out of province inspection and get it plated and registered under my name.
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  #20  
Old 01-27-2009
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Quote:
Originally Posted by toreador4x4 View Post
Glad i was able to help. No one likes to take my advice on here

Also, you never show yourself cleaning the MAF. I hope you didnt wipe it off, you shouldnt touch the filaments with anything.
You know I got your back Bro.
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Old 01-27-2009
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Quote:
Originally Posted by Ford04Ranger4.0 View Post
You know I got your back Bro.
Random...
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  #22  
Old 01-27-2009
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It's not random if you have noticed hes helped me with my filter problem
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  #23  
Old 01-27-2009
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If he's got his back,I'm on there too. Might get weird if it ended up like this...

http://www.youtube.com/watch?v=BQALeeHWJyE
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  #24  
Old 01-27-2009
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ya i call bs i run k&n drop in and i got nothing clean as new is my MAF i didnt even have to clean it when i went to..
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  #25  
Old 01-28-2009
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Quote:
Originally Posted by jaycheetwood View Post
ya i call bs i run k&n drop in and i got nothing clean as new is my MAF i didnt even have to clean it when i went to..
Wow try again, this time in english
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