No Spark

[Alski]

Ok so here is the story. After fabing and installing my engine cage, radious arms, pivot boxes and x-brace I go to start the truck (1990 Ranger 4.0 auto Prerunner) and it will not start. After checking for fuel, checking all fuses, wires, vac hoses, still no start. I pulled a plug wire and tested - nothing.
I screwed up and didn't disconnect the battery or computer and am wondering if I fried the computer with the welding? Is there a simple way to test the computer without needing a masters from MIT?
Any ideas or suggestions?

 

[adsm08]

not one that i know of. If you have a buddy with a similar year 4.0 steal his, plug it in, and see what happens. If you get real lucky you might find one in the junk yard. Where are you? I have a 94 computer that I will let you try with if you are in my area. It won't be a perfect match, but if your problem is the box it should be enough to get her to fire off.

 

[Bent Bolt]

Does the check engine light come on with the key on, engine off ??

 

[beaujt]

just a guess, but i'm pretty sure ya fried the computer.

 

[snake]

You can send it to www.ecmtogo.com and they will tell you if it is good or not.

 

[adsm08]

I just remembered. Some parts stores can test them for you, hook them up to a tester or something.