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Topic: 84 5.0 EEC-III Engine dies at idle randomly, rough idle at times, runs great at speed (Read 5385 times) previous topic - next topic

84 5.0 EEC-III Engine dies at idle randomly, rough idle at times, runs great at speed

Reply #30 –
I see the wire going to the sensor.

Looks like the alt, air pump, etc needs to be removed to get to it. Is there a shortcut/access to the sensor that I am not seeing?
1984 T-Bird Elan 5.0 (sold)
1994 T-Bird LX 4.6
2009 Dodge Charger Daytona 341/400
2013 Camaro SS

84 5.0 EEC-III Engine dies at idle randomly, rough idle at times, runs great at speed

Reply #31 –
Son of a beatch!!!!!

It was acting stupid today (like it has been). I by accident moved the coil wire and it stopped its bs.

The coil wire was very close and touching the wires for the injectors and the tps. Put the wires near each other.....hiccup. Move the coil wire away.....purrrrrrrs :=)

So now the coil wire runs on top of the air cleaner snout and the injector/tps wires are under and to the back of the snout. I guess the rf from the coil wire was screwing with the injector or tps wire voltages. Brand new Accel plug wires should shield better than that I would guess, maybe not.

Gonna drive for the next few days and see what it does......let my 4.6 rest a few days.
1984 T-Bird Elan 5.0 (sold)
1994 T-Bird LX 4.6
2009 Dodge Charger Daytona 341/400
2013 Camaro SS

84 5.0 EEC-III Engine dies at idle randomly, rough idle at times, runs great at speed

Reply #32 –
Great find!!!
I'm going to write that on the wall for future reference.

84 5.0 EEC-III Engine dies at idle randomly, rough idle at times, runs great at speed

Reply #33 –
Rule of thumb with old fords is to just run motorcraft wires.  Fords get pissy with non motorcraft parts.  Good find though man, it's a pain in the rear to find out that it was something simple after you have been fighting for so long.  Also, a good way to drop those Hydro carbons is to throw a couple of gallons of Methanol in your gas tank.  I have a 93 ranger that did great on CO and CO2 but failed for 374 in Hydrocarbons, after 4 gallons of Methanol to 10 gallons of premium it passed with 62 in the hydrocarbons.  :)
1987 Thunderbird Turbo Coupe (daily driver) - T5, Short Throw, Ranger roller cam (soon to be Boport 1.5), stock turbo and TMIC (also soon to change.)

84 5.0 EEC-III Engine dies at idle randomly, rough idle at times, runs great at speed

Reply #34 –
....and now today the passenger side window doesn't want to go down or up....you can hear the motor...but its going crooked. Always something....lol
1984 T-Bird Elan 5.0 (sold)
1994 T-Bird LX 4.6
2009 Dodge Charger Daytona 341/400
2013 Camaro SS