Pulled codes, need a little help

[Rerun]

Well, I've been hunting down a little problem of the following. Once I've been driving the car for awhile and the car has heated up, or in really hot weather, the car will rise idle to about 1500 and sit there. Normally, I just let the clutch out and hold the break until the idle drops. This is a temporary condition, as it will go away after awhile, but will come back again. Anyhow, I pulled codes, they are as follows. Any of these have any effect on idle, etc?

I've just recently replaced the IAC, IAT, ECT, TPS (Checked Voltage .98) sensors.

O85 - Canister purge circuit failure

I have no idea what this is, any help?

C29 - Inssufficient input from programmable speedometer/odometer module. Also, Inssufficient input from Vehicle Speed Sensor (VSS)

My speedometer doesn't currently work as I need to get a new clip for the cable where it hooks into the transmission. Could this be the cause of this?

C33 - EGR valve not opening properly.
Also, no ideas here, any help?

 

[Rerun]

* BUMP *

 

[jrichker]

Code 29 - Vehicle Speed Sensor (VSS) is an electronic sender mounted on the speedo pickup gear on the trans. It works the cruse control for both 5 speed and auto trans cars. On auto trans cars, it tells the computer to speed up the idle slightly as you slow down to a stop to keep the engine from stalling. Check to see if the electrical connector is plugged into it. Cost is under $30 and it is easy to replace.

Code 33 - Insufficient EGR flow detected.
Look for vacuum leaks, cracked vacuum lines. Check to see if you have 10” of vacuum at the EGR vacuum connection. Look for electrical signal at the vacuum regulator solenoid valves located on the rear of the passenger side wheel well. Using a test light across the electrical connector, it should flicker as the electrical signal flickers. Remember that the computer does not source any power, but provides the ground necessary to complete the circuit. That means one side of the circuit will always be hot, and the other side will go to ground or below 1 volt as the computer switches on that circuit.

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)

http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif

Code 85 - CANP solenoid (ALL 1989) - Solenoids - the Carbon Canister solenoid is inoperative. Check vacuum lines for leaks and cracks. Check electrical wiring for loose connections, damaged wiring and insulation. Check solenoid valve operation by applying 12 volts to the solenoid and blowing through it.