1996 Ford Mustang EVAP sensor

FLADEBBEE

MEMBER
1996 FORD MUSTANG
V8
2WD
MANUAL
200,000 MILES

Would changing the evap pressure sensor, make my car drive smoother? Is that what is causing it to putt around? The troubleshooting from the check engine light says it might need one, or a new hose between purge valve and FTP sensor, or evap purge valve stuck closed. Are this things hard to replace? Are they expensive? Thanks for helping.

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Before replacing anything and wasting money, have the system fogged to identify where the leak is. Otherwisel, you will endi up replacing good things and never finding the problem.

Let me know what you find.

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Friday, October 23rd, 2009 AT 9:38 AM

FLADEBBEE

MEMBER
5 POSTS

I replaced the evap sensor, and the hoses. I also replaced a spark plug. It runs smoother, with the check engine light still on. I had Auto Zone check it again. The same thing came up. So what do I do next? Should I change ftp sensor? How do you go about having the system fogged? Thanks for the information.

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Friday, October 23rd, 2009 AT 2:11 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

As far as the fog, there is a port under the hood. A fog machine is attached to it and at a very low pressure (around 1 PSI) fog is fed into the system. If there is a leak, the fog will come out so you can identify where the problem is.

NOTE: What EVAP code was set? There are several. Before paying to have this done, make sure there is a large or small leak, otherwise you will be wasteing your money.

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Friday, October 23rd, 2009 AT 9:04 PM

FLADEBBEE

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5 POSTS

The oem number to cross:P1443
Is this the code you need to know? It talks about the fuel tank pressure. I wrote down what the paper from Auto Zone said, already, somewhere. It also talks about a FTP sensor. Thanks again deb

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Friday, October 23rd, 2009 AT 9:37 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

P1443 indicates a mechanical fault in the Evaporative Emission (EVAP) Purge Flow System. Nine times out of ten this code is due to a loose gas cap. So that would be the first thing to check. Also, the cap may not be holding pressure.

The other things you can look for are pinched, plugged, blocked, cracked, cut or disconnected vapor hoses between the fuel tank and carbon canister. Check for a cracked or broken carbon canister or fitting(s).

I honestly feel that having the system fogged will help identify the leak. It could actually be the charcoal canister itself.

I hope I'm helping and not confusing you.

Joe