Holy massive vaccum leak batman!

[Gabe96Explorer]

Well, my 96 V6 sport has a massive vac leak from the top of the motor... It seriously blows harder than Megan Fox. It's not WOOOOing like the sticky video is though.

With the vac leak comes a bogging down at idle, almost to the point of stalling, but it seems like it has a miss it bogs down so hard and bucks forward.

We sprayed TB cleaner under the intake area and it cleans its self up. No idea where to even begin on this one. I'm so used to imports and 4 cylinder horizontal mount motors.

I also throw codes - 172 - 174 - 455 @ Both KONR and KOER.

Tried replacing the IACM - nothing.

On another note, I am getting hard shifts into 3rd. I need to change out the trans fluid this weekend. What is the type I need?

Thoughts?


edit - turned out to be the EGR Uppipe. Shoved it back in and WHA-LA! No more crappy idle... chalk this one up to be another source of the crappy explorer idle.

 

[R1dd1cK]

Sounds like an intake gasket or a cracked vacuum line.

 

[Rudy602]

sohc or ohv? The SOHC is known for the bad intake gaskets.

 

[Gabe96Explorer]

Yea, SOHC.

Gah...

 

[Joe Dirt]

Where exactly are you spraying that it clears up- that's the backyard mechanic indication of where the leak is...

 

[Gabe96Explorer]

It clears when I spray to the left of the runners and directly under the TB intake.

Is this a pretty accurate description of how to change the upper intake manifold gaskets on the v6 SOHC Explorer? - http://www.explorerforum.com/forums/showthread.php?t=171819

 

[Rudy602]

If you're going to change the uppers, you might as well change the lowers while you're there and eliminate the chance of having to backtrack. I got the 00m12 kit [ford part #YL-2Z-9E473-AA] and did the hyd. tensioner at the same time. It hasn't run this good since it was new.

See 2000StreetRod's "Dales helpful threads" - "starting my 00M12 installation" very helpful

 

[Gabe96Explorer]

what I really need is an accurate description with pictures to help me here. the ranger one looks alot more like my engine bay for sure.

 

[Gabe96Explorer]

Noticed the green oring gasket on the EGR tube happened to be showing... hit that directly with TB cleaner and idle cleaned up...

Fixing later.

 

[Rudy602]

If you could see the green o-ring with the manifold installed, you definately need to deal with it, it sits in a recess in the EGR tube that is normally out of sight. Since it's under vacuum, not pressure,[unless it backfires] it shouldn't migrate out of the pipe. Has that manifold been off before? I'd still consider doing the intake gaskets and tensioner since you have to pull the intake to change the o-ring, and the parts are pretty cheap compared to the labor.

 

[Gabe96Explorer]

If you could see the green o-ring with the manifold installed, you definately need to deal with it, it sits in a recess in the EGR tube that is normally out of sight. Since it's under vacuum, not pressure,[unless it backfires] it shouldn't migrate out of the pipe. Has that manifold been off before? I'd still consider doing the intake gaskets and tensioner since you have to pull the intake to change the o-ring, and the parts are pretty cheap compared to the labor.

It hasn't back fired once....

The previous owner replaced the EGR system and obviously didn't put the EGR Uppipe back in correctly.

My mechanic said he could get that Uppipe back in no problem. I have it pushed back in enough to get it to seal, but hes going to finish it.

Truck idles great now.

 

[Gabe96Explorer]

and it looks like I have the OHV

 

[ThePhoenix]

uummmmmmmm, Megan Fox