Missing parts under hood

curtisboytejr · Jun 19, 2011

I had a engine warning light and i went and purchased a code reader and it gave me a code of 85 which is canister purge soleniod cicuit failure. So after i did a little research to find where the part is located and i go to the car and it is not even on the car. I cant even find the plug. I'm sure the plug has been cut off and is gone. I was hoping someone could tell me which wiring harness it was originally in. Picture would be great. 93 mustang GT

jrichker · Jun 19, 2011

Code 85 - CANP solenoid - The Carbon Canister solenoid is inoperative or missing. Check vacuum lines for leaks and cracks. Check electrical wiring for loose connections, damaged wiring and insulation. Check solenoid valve operation by grounding the gray/yellow wire to the solenoid and blowing through it.
The computer provides the ground for the solenoid. The red wire to the solenoid is always energized any time the ignition switch is in the run position.

Charcoal canister plumbing - one 3/8" tube from the bottom of the upper manifold to the rubber hose. Rubber hose connects to one side of the canister solenoid valve. Other side of the solenoid valve connects to one side of the canister. The other side of the canister connects to a rubber hose that connects to a line that goes all the way back to the gas tank. There is an electrical connector coming from the passenger side injector harness near #1 injector that plugs into the canister solenoid valve. It's purpose is to vent the gas tank. The solenoid valve opens at cruse to provide some extra fuel. The canister is normally mounted on the passenger side frame rail near the smog pump pulley.

It does not weigh but a pound or so and helps richen up the cruse mixture. It draws no HP & keeps the car from smelling like gasoline in a closed garage. So with all these good things and no bad ones, why not hook it up & use it?

The purge valve solenoid connector is a dangling wire that is near the ECT sensor and oil filler on the passenger side rocker cover. The actual solenoid valve is down next to the carbon canister. There is about 12"-16" of wire that runs parallel to the canister vent hose that comes off the bottom side of the upper intake manifold. That hose connects one port of the solenoid valve; the other port connects to the carbon canister.

Purge valve solenoid:

The carbon canister is normally mounted on the passenger side frame rail near the smog pump pulley.
Carbon Canister:

Diagram courtesy of Tmoss & Stang&2birds

Mustang5L5 · Jun 19, 2011

Find the ect sensor on the pass side of the motor. Right where the wiring for the ect sensor come out of the harness, is the wiring for thencharcoal canister as well. It's in the same tape out. From there, you can trace the wiring down to the canister mounted on the passenger side frame rail.

curtisboytejr · Jun 19, 2011

Thanks this will help a lot

curtisboytejr · Jun 19, 2011

I wonder why someone would remove it?

RangerJoe · Jun 19, 2011

Its not uncommon for them to be missing. I think they usually get jerked out when people pull their emmissions and smog stuff; usually to just unclutter the engine compartment.

curtisboytejr · Jun 19, 2011

Thanks guys, i found it and it was right where yall said. I got to order me a new solenoid now and some tubing.

Mustang5L5 · Jun 19, 2011

Which part is missing exactly? There should be two lines. One runs from the canister, to the rear of the car and gas tank. The other line comes out of canister, to the solenoid purge valve, then up to the intake manifold. This line is just standard vacuum line. Nothing fancy

curtisboytejr · Jun 19, 2011

The missing parts are solenoid purge valve and the tubing for it.

curtisboytejr · Jun 23, 2011

Hey guys, i need a little more help. I purchased the purge valve solenoid and it looks correct but it does have a different connector on it. I was wondering if there is another wiring harness in between the connector and the purge valve. thanks Curtis.

Mustang5L5 · Jun 23, 2011

There is a short wiring harness that plugs up to the harness on the engine and extends down to the canister. It's about1.5 feet long. The solenoid connects at the canister

curtisboytejr · Jun 23, 2011

I went to pull-a-part and found one that was identical off of a 1988 5.0 crown vic. so i cleaned it up and going to install it tonight. Thanks guys

aar0s · Jun 23, 2011

not to derail, but where does the the HEGO ground at, number 19 in the diagram?

jrichker · Jun 23, 2011

aar0s said:
not to derail, but where does the the HEGO ground at, number 19 in the diagram?

On the intake manifold or the back of the cylinder head. If memory serves me correctly, there is a spot on the back of the cylinder heat that is used for the ground.

aar0s · Jun 23, 2011

I had my intake off last fall and dont remember any ground on it so its probably on the head. thanks, i bet that mine is covered in oil then!

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