Can't find Mass Air Flow Sensor

While replacing my starter solenoid, which lives right next door to my MAP sensor, I accidently knocked the vacuum line loose. On restart of the engine the racket/noise that came from the MAP was nerve racking. Quickly found my problem and reinserted the vacuum line...ahhh peace and quiet.

I bet if I disconnected the vacuum line, I'd get all of those codes.

Wiz,

As a refugee of Detroit engine labs of many years, I can tell you that those codes only tell you what the ECU thinks is a problem.

MAPS kind of come in two kinds. There are some that are hard mounted to the throttle body and others are off on a bracket somewhere with a small hose that goes to someplace on the intake.

The ones mounted on the throttle body can get gummed up. They would sometimes accumulate fuel and such. Those can be cleaned with electrical cleaner. Just be real careful to not hit it too hard. If you stick the straw in and hit the button, that may kill it. Be sure to shake it nipple down when you think you are done.

If it is on a hose, check the hose for cracks and blow some solvent through it also check the port where it is attached. Try cleaning it as recommended.

They can go bad, but that was very rare. Our durability test were huge mile equivalent, but run in hours (weeks actually). We never figured out how to do more years in less time.

Matt

Not to easy to get at, think i have to lay on top of the engine
looking with dog house up, its on the far left upper corner

will run KOER test tommorrow, just to be sure i'm not getting any of the MAP codes

MAP pricing, thanks guys, much better

i saw an old price on a ford forum post, something like $180

If it needs a MAP they are less than $100. And easy to replace.

This is an educated guess, but I think I am correct. Motorcraft CX-2403 Manifold Absolute Pressure (MAP) Sensor

About $52 on Amazon

i don't need a MAP

i don't have these codes

MAP trouble codes:

Code 22: MAP Sensor Out of Range.
Code 72: Insufficient MAP Change During Dynamic Response Test.
Code 126: MAP/BARO Sensor Higher Or Lower Than Normal.
Code 128: MAP Sensor Vacuum Hose Damaged or Disconnected.
Code 129: Insufficient MAP Change During Dynamic Response Test KOER.

i thought i might have a MAF problem
but this doesn't a MAF

so i investigated the MAP

1996 460 did not have a mass air, it's a speed density system. So, it uses a MAP ( manifold absolute pressure...basically a vacuum sensor) sensor for load calculations instead of measuring airflow like a Mass Air sensor.

Edit,
OOps, all the other replies came while I was typing....

Why do you think you need a MAP sensor?

OK did some more research
this thing does NOT have a MAF
it DOES have a MAP aka Manifold Absolute Pressure sensor
can not be cleaned, if bad it has to be replaced, and it an't cheap

thanks all