Rough idle Tach going nuts when trying to start

[Jschmidt1975]

I have a 1988 Ranger 2.3 4 cylinder. When I try to start it in the morning my truck is hard to start and when it does turn over the truck idles very rough and i have to keep my foot on the gas to keep it running and the tach is going all over the place. When the idle smoothes out after about 2 or 3 minutes it idles and runs fine. Has a new air idle control valve, TPS sensor, coolant temp sensor. New wires, plugs, rotor,cap. Usually starts fine after it is warm. Any help would be appreciated, thanks.

 

[Jschmidt1975]

above

Also only idles bad,rough when the tack is jerking all over. Thanks

 

[Earl43P]

http://www.therangerstation.com/tech_library/EDiagrams/files/Diagrams_StartIgnition83to88_2_3.JPG

Try priming the fuel system before cranking the starter:
Key to Run (dash lights come on), wait two seconds as fuel pump runs,
Turn key back to Off, repeat, repeat, THEN crank the starter.

 

[snake]

If this has a cold start sensor I'd suspect it is going out.