xirtam

I have a 86 E 150 with a 5.0 automatic. It has aprox 169k.
Here are the problems that I have with it:

• Idles very low (it will die it I don't put it in neutral and give it gas)
• After I run it for about 45 minutes on the highway it will begin to hesitate and jerk. It will loose power until it eventually becomes worse and will barely drive. Sometimes I hear a clunk under the gas pedal when it hesitates and jerks. It almost feels like it stops getting fuel.

This is what I have done to it:

• New TPS
• New Map Sensor
• New PCV valve
• New sparks, wires, rotor, and cap
• New fuel pump and filter
• New battery and alternator (it needed both)

This is what I have ordered and will replace:

• Idle control valve

Any ideas? Your help will be greatly appreciated:

Thank you.

P.S. I know that this is an F150 site and that this forum begins with the year 1987 (mine is 86) but I have not been able to find any other place that can help me.

AuroraZero

Make sure you put the TPS on the correct way. Sounds like you have it on backwards.

xirtam

Hello, thank you for the response Do you mean upside down? When I installed it I made sure that the TPS moved (tabs inside) when I moved the throttle.

xirtam

I checked the TPS and it is installed correctly. Scanned for codes got KOER code 34 "EVAP control system fault/voltage higher than closed limit (v8 models)" Any ideas?????