Question about 1990 Ford F150

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Where is the plenum gasket on a 1991 ford f150 4.9

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Posted on Jan 02, 2017

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Zeevert
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SOURCE: How to replace plenum gaskets on 02 ford escape

I'm going to guess that you have the V6?
Replacing the gaskets is not too difficult for someone with basic mechanical/handyman skills. Go to the website for a tutitorial on the job:
http://www.escape-central.com/1forum/showthread.php?threadid=32550&referrerid=11756
While you have the intake off, make sure you replace the spark plugs.

Posted on Mar 17, 2010

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1 Answer

Change coil packs under intake manifold in back?


the intake plenum will need to be removed. Not to hard to do. make sure you replace the gaskets before reinstalling the plenum. Also not a bad time to replace the spark plugs as long as you have the plenum off. Autolite or motorcraft spark plugs would be a good choice.

Aug 12, 2013 | 2004 Ford Taurus

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Upper Intake Plenum Gasket R+R Torque Sequence


I cannot post a picture here because that is copyrighted material. However, the torque sequence is always "start in the center and work your way out to both ends...pretty simple.

The torque specifications are different depending on which engine your Escape is equipped with.

Apr 23, 2012 | 2004 Ford Escape

1 Answer

Intake manafold gasket


If you are just talking about the cost of the gaskets there is kind of an upper (plenum) and a lower intake set. If you just need the plenum gasket they are only about 30 dollars. If you need the entire set there are a couple of option. Just a regular set runs you about 70 (that's both the upper plenum and lower intake manifold but FelPro puts out a great gasket set called "permadry" and the runs about 165 dollars. If you were looking for labor cost it depends on the hourly labor rate of the shop you are using. The labor guide says that if you are replacing both upper & lower it shows 3.4 hours in labor. If it's just the plenum it says 2 hours of labor. Hope this is what you are looking for and by the way I am going by the most common engine found for the Windstar for that year and that engine is a 3.8 liter. If you happen to have the 3.0 the prices and labor hours may be different.

Mar 31, 2012 | 2000 Ford Windstar

1 Answer

Idled up extremely high. need to know how to turn it down. 5.0 engine. no cruise control


There is no idle adjustment on these trucks, the computer controls it, or at least tries to. A very common problem is for the intake plenum gasket to leak and the extra air causes a high idle. Get a can of aerosol carb cleaner and spray it along the length of the intake, usually near the back, you'll find a spot where the idle changes a lot. This will confirm the gasket leak. You will need an extra long t40 torx head driver to remove one of the center plenum bolts that's only accessible through the top of the plenum.

Aug 24, 2010 | 1990 Ford F150

1 Answer

Nissan 300zx twin turbo, VG30DETT motor. coolant in oil. just finished rebuilding the motor and block and heads have been decked and squared to meet up perfectly. head bolts have been torqued down...


if car has a oil cooler that uses coolant to lower oil temp. check that, if not you might want to get a coolant psi tester and try locating leak that way. but my expierence is that a head gasket problems cause this also if block was bored and machined that could also be the issue.

Feb 10, 2010 | 1991 Nissan 300ZX

1 Answer

Instructions on changing the timing cover gasket on a 1991 ford thunderbird with 3.8 liter v6 engine


first you have to diconnect throttle cable and trans kick down from throttle body. than disconnect wires and vacuum hoses and remove upper intake manifold plenum. that should give you access to valve covers . Remove bolts from covers and change gaskets. also replace the gasket on the upper intake plenum. install items in reverse order of removal. keep track of vacuum lines where the go when you remove . mark with tape their location.

Nov 08, 2009 | 1991 Ford Thunderbird

1 Answer

Idles bad


Sounds like you may have an upper intake manifold leak. Typically the gasket between the Plenum and the lower intake dries up and gets sucked into the intake a little causing a leak and a high idle issue. The repair requires the removal of the plenum and replacement of the gasket. NOTE: there is a torx bolt hidden between the center plenum runners and can only be seen by looking straight down at the top of the plenum and it may be covered in dirt. If you have to use a bar to pry off the plenum you probably have missed a bolt. Typically it is the one noted above. Best of luck.

Mar 22, 2009 | 1991 Ford F150

1 Answer

2000 ford windstar won't stay running


Sounds like you got a vacuum leak somewhere on that thing. Do you hear any hissing while its running. You can take some carb cleaner in aerosol can and spray it around the intake while its running to check for vacuum leaks. If it has one big enough the thing will change idle. Visually look for some sucked in vacuum lines on that thing. There is an IAC valve on top of the throttle body tap on it with a screwdriver and see if it idles. Lastly I hate to tell you those things were bad for upper plenum gasket leaks, you will need the upper plenum oring gaskets 6 I think, and the isolator bolts that hold it down, and 1 big upper plenum oring gasket. And the pcm will need a reflash when done should take care of the Check Engine Light.

Jan 26, 2009 | 2000 Ford Windstar

1 Answer

Hobgoo44 High Idle


Could be Idle control valve sticking, vacuam hose leaking or upper intake plenum gasket failure, if you've already checked to make sure thottle plates are closing. Next time it happens, try tapping on the IAC with a small hammer and see if the idle drops to normal.

Dec 20, 2008 | 1991 Ford Econoline

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