hey guys i was just wondering. i have a 98' f-150 v6 engine. my engine is idoling high and it has a very very rough idol. now i've went and put it on computers but however my friends tell me not to listen to them bc all it's telling me is its the mass air flow sensor and i dont' think thats it. any ideas? and how would i go about fixing it?

 

Yea, you have a hose leaking - Most likley the PCV system. Easy fix, you just have to look at it and follow the lines with your hand. Move them around while it's running, -you'll find it.

The six leaks under the TB and also towards the back by the firewall.

 

thank you

 

No problem - Sounds like you better clean that MAF as well. Another easy job.

Don't forget to reboot

 

ok. so u think it might be part of the problem??

 

No, but it could be a problem. High idle is usually associated with unmetered air intake - A leak. That can cause all sorts of problems, I'm surprised you don't have a CEL with lean codes. That's strange.

If by chance you do have a CEL, you need to get it scanned and report the codes here. Then all of us will help you.

Without codes, it's about useless and a guessing game. Auto Zone reads them free, write them down and post back. Do that and you'll get the help you need. I just gave a good guess.

Use this community to your advantage, it's a good one - Welcome to the site

 

thanks. i was hoping i could find a good site. i dont know alot about engines but i'd like to learn

 

whats a CEL?

 

umm where would the hose be? like i said i know nothing about engines lol

 

A CEL = Check Engine Light.

Some refer to it as a MIL.

A MIL = Malfunction Indicator Lamp.

It's a Amber light that illuminates in the right lower corner in the cluster when there is a problem. The cluster is your readouts above your steering wheel. You Speedometer and Tack is in the cluster.

When there's an Amber light (CEL) - The best thing to do is to go to Auto Zone and tell them you have a CEL and they will plug into your comp and read the codes. These codes come over their scanner, these are what YOU need to right down. It's a good service and it's free, but that's as far as it goes. Don't purchase anything at this time, just write the codes down and post them here. We will tell you what to do at this point.

 

Check engine light.

 

ok ya i know what that is and it has been on since i bought the truck. it's a nice truck i just want everything to be in tip top shape for when i go to college. where would that hose be is it just the vaccum hose?

 

A PCV valve plugs into your valve cover. Hoses run from the PCV to your intake and sometimes -throttle body elbow. Check these hoses /elbows and whatnot first. Chances are, one of these are the idle problem. To much air, the PCM (computer) can't configure/set (idle) correctly.

Also, if the throttle body is very dirty, that can cause these issues as well.

 

I posted that first/ hit submit/ then edited.

That's why I beat you to it - haha

 

This is how you clean the MAF - This is a VERY important part of maintenance with your Essex engine. This is a 4.6L , but in general, it's the same -

It's on this "how to" page along with allot of other useful info. -

http://www.fordf150.net/howto/

Also here's this sites "how to" page -

https://www.f150online.com/forums/articles-how-tos-119/

Great Info that should come in handy