Truck Won't Crank!! Need Help!!

[kmprltning]

My truck won't crank and nobody has a clue to what it is. I was first told it was the computer so I got a new one and that wasn't it. It will crank and run just for a minute whenever it wants too it just won't stay running. I have taken it to the ford place and had them put it on the computer and the only thing that showed up on there was the security light. Has anybody else had this problem? I NEED HELP!!!!!!

 

[Heavy_Metal]

Mine did this twice before. Both times it was Crane ignition box. The last one Crane sent me has worked without a hitch for over a year now.

Do you have an after market ignition? If so, you may want to bypass it as a test.

Hope you can get it figured out.

Heavy_Metal

 

[lightninggreg]

Let's go back to basics! Do you mean that your truck will turn over but not start? Do you mean when it starts it won't stay running? The most important thing you can do is prove whether you have an ignition or fuel problem. Once you determine that, you can move forward. Find a method to observe your spark to your plugs even if a friend has to hold a spark plug wire off the distributor so you can see it "jump". If the spark leaves and then the engine dies, fix your ignition. If the engine dies and the spark continues as long as the engine is turning over, fix the fuel system. The computer is supposed to be able to make your engine run bad but never leave you stranded unless it "blows up". I bet you have ignition or fuel trouble. The computer can't see this. Narrow your trouble down to one of the two and I'll bet someone on the site can help you from there. Good Luck, Greg