[b][i][color=#3333FF]The problem that i have is that my truck wont start i chek main relay circuit relay starter coil rotor time sensor computer swicht battery and i stil have the problem and what it hapens is when i tunr the switch 1 time out 20 it will make the engine turn but stil the engine wont start and thats another problem i check the switch and it is ok has any bnodyhad the same probelms or knows how to fix it can you plese tell me and i have a 2.4 efi engine

Check the basics. Air, fuel and spark.

thanks for the post but i did air flow fuel presur and spark i have all that and stil dont know why wont start

You said 1 in 20 it won't crank? Is the key switch going bad?

Other things to check are:
Spark: I had a coil die and cause the engine to die. It had a spark, but a yellow spark. It should be a nice hot blue spark. The yellow one was not enough to light the fuel off.
Fuel: Assuming you checked and have good pressure (I think about 30 PSI), then are the fuel injectors firing? They make a loud click noise. You may want to disconnect one and plug a LED test light in and watch for blinking as you are cranking.

Have you checked to see if it has any error code? I am unsure if the '85 had a check engine light as it was the first year for EFI, but it's work looking into. Pick up the two service manuals at the dealer. They will have step by step list of things to check if it won't start, and how to check each part in that step. At least my 93 one does.

thanks for the post i check the ecm and gave me the ac switch code is that the regular where u put the key tu turn it on or is it a seperate relay [please help

What?

when you say it doesnt start WHAT DO YOU REALY MEAN.

ENGINE DOESNT TURN OVER OR DOESNT RUN.

IT DOESNT RUN COLD OR HOT OR DOESNT MATTER

IF THE BASICS ARE GOOD (IGNITER FAULTY) OR TIMING CHAIN IS LOOSE.

GET BACK TO ME (I WILL START YOUR ENGINE DUDE NO PROBLEM)

GIVE ME ACCURATE STATE OF THE ENGINE

ditto, be more clear on the symptoms.

thanks man for the post
when i say it doesnt start i that it doesnt start when you turn the ignition key on only does it ones every 30 times but if you go to the start and jump it
the engine turn every time and it has a new timing belt
the ecu gave me a code when i tested and it said ac switch
but i dont know how acurate is it
the IGNITER is working find
thanks man let me know if i explain everything ok

I am still not understanding.

A) The engine cranks, but it will not fire unless jumped.

B) The engine does not crank, but will crank when jumped. And it starts.

A or B?

sorry for that the engine cranks fine but when you use a remote starter
and stil wont start but if you used the ignition key but one out of 30 time it will crank the engine but stil wont start

belt ? or chain . nayho...if with a remote starter swithch jumpered frok the starter to the battery it turns over but when using the key it dosent then check the clutch switch . if its not a manual trans then the nuetral safety switch could be open.
intermittent cranking could be caused by starter relay or any of a host of other demons. hope i helped

I would replace the key switch first. I am guessing just not kicking over the starter is not it's only problem. It's not sending the right power to the ECU.