Solved 1995 Aerostar with a 4.0L engine. I have oil pressure at idle but not when driving.

[BrooklynBay]

The dog house cover has a few straps holding it down. The center console or the ABS module under the dashboard might be in the way if you try to pull off the cover but there's a way to wiggle it out.

 

[Josh P]

Called Ford; it's called a camshaft position sensor transducer. It has the oil pump drive gear attached. F3TZ-12K-073A (obsolete) Dorman 30S2605 or Cardone 84S2605. I'll open the dog house tomorrow and check for wear.

My bad, I should have paid closer attention to the year of your van. My 91 doesn't have that sensor. It is just a plug with the pump shaft on it. removal is the same as a distributor, 13mm bolt holds a washer over one side. It will twist as you pull it out. If you can please post pictures of it and the camshaft gear.

 

[CLTuna]

Unbelievable!

Got the doghouse off per your instructions. My shaft did not have any wires connected to it. Ford parts did me wrong. Mine was as Josh P described. Pics attached. The gear and shaft were in fine shape.

 

[CLTuna]

Unbelievable part 2

Next step was to finish a flushing of the oil pan and hopefully cleaning the screen.
-I dropped the oil, then installed the drain plug
-Added 1 1/2 quarts of mineral spirits down the fill hole
-Shook the van back and forth and let it sit for an hour
-Attached the mech. oil pressure gauge to a couple hard hoses under van
-dropped the mineral spirits
-once down to a 2 second drip bent the straw of a can of brake clean upward at a 90 degree. shot it through the drain plug hole all around. Used a half can.
-once down to a 2 second drip installed the drain plug
-Filled with a Wally World brand of 5w-30
-started the engine

In two seconds it was quiet and I thought holy crap! I looked at the mech. oil pressure gauge. No way! Look at this! 54 pounds of oil pressure!

 

[Josh P]

Those teeth look brand new, glad you got it fixed.

 

[CLTuna]

Unbelievable part 3

Now we're cooking!

Replaced the gauge with a new oil pressure switch/sender. I had to use teflon pipe tape to get a good seal to fitting. Started her up and bam! Ok probably a poor choice of words. Back in the zone on the dash gauge. Drove it for 15 minutes 60-70mph on the nearby interstate. stayed where it belonged.

You guys know your s**t! Thanks a ton Brooklyn, Don and Josh for answering my time in need. Now I can continue my ice fishing schedule.

Charlie, Cedar Lake Tuna or as the Icepac call me "pond solo"

 

[BrooklynBay]

Thanks for the update. I'm going to mark your thread solved. It's good to see another Aerostar back on the road again.

 

[Josh P]

Spec is 40-60 psi at 2k rpm. 54 is a good number.

 

[don-ohio]

Glad you got er fixed! Now take it easy on it and look out that you might need to change the oil and filter again in a few days driving.Lotta dirt may have broken loose,so keep an eye on it. Taking an extra oil change with you might not be a bad idea. don-ohio

 

[CLTuna]

Will do. Thanks Don!