Ignition Problems... Need Help

I have a 95 ranger with a 3.0 engine. My old truck has nearly 240K miles. Recently I threw a rod in the "old engine", and bought a used engine (another 95 3.0) and put in to replace the blown engine. The used engine was out of an automatic and my truck is a five speed, so I had to use the engine wiring assembly from the "old engine". That's the history, here's the problem; I am not getting any fire to any of the plugs on the replacement engine. I put the coil pack from the blown engine (it was working fine at the time it threw a rod) onto the used engine I installed, but still get no fire to plugs. I was very careful when swapping the wiring assembly from blown engine, and as far as I know, all connections are correct and connectors are seated properly. I have 11.99 VDC supply to the coil pack with the ignition turned on. Where the supply voltage terminates at the coil pack, there appears to be 2 vacuum lines coming into this same termination assembly. Is it possible that a vacuum problem is preventing the supply voltage from actually getting into the coil pack? I have disconnected, then reconnected the battery several times in hopes to reset the computer, but this hasn't helped. I also have checked the fuses, but no blown fuses were found. Could there be some type of computer glitch created by swapping engines? I had recently replaced the crank shaft sensor on the blown engine, so it's fairly new. Could it possibly solve the problem by swapping the crank shaft sensors? I have worked on this engine swap for several days and have missed 3 days of work. I need my truck to get to work and am in dire straights here. If someone can help me out on this I would greatly appreciate it. Please respond ASAP. You can also email me at [email protected]

unless you put the auto tranny in the truck. i don't see why you would need the automatic wiring harness. And if you think you can hook up the manual tranny harness up it should work. just my 2 cents.

also did you use the auto computer? they are different. if not might be easier just to see if the manual harness will work.

unless you put the auto tranny in the truck. i don't see why you would need the automatic wiring harness. And if you think you can hook up the manual tranny harness up it should work. just my 2 cents.

also did you use the auto computer? they are different. if not might be easier just to see if the manual harness will work.
Thanks for your response, but there seemed to be a misunderstanding about the wiring harnesses. I used the the 5 speed wiring harness from my old blown engine on the used engine (an automatic) that I installed in my truck. I did not change the computer or transmission. Many thanks anywho!

I don't understand the vacuum hose hook-up at the ignition pack. ???

Have you tried looking up your particular model on AutoZone.com.?

probably be best if you used factory manual(library maybe) but here is the autozone one http://www1.autozone.com/servlet/UiBroker?ForwardPage=az/cds/en_us/0900823d/80/0b/ea/d3/0900823d800bead3.jsp

I don't uderstand what role the vacuum line hook up may have, but at the 12VDC plug on the coil pack, there are 2 small vacuum lines that run into this same 12VDC plug assembly. Thanks again for your response. I talked with a local mechanic today and he told me that most likely the computer is not getting a signal from the crank sensor, and the computer doesn't know that the engine is turning over and trying to start. I'll try swapping the crank sensor from the blown engine. Hopefully this will resolve the problem. If not, I'll try Autozone. I'll let you know. Thanks

Just to let you know, I got my problem solved. The Autozone link you guys provided was very useful. Thanks. I would recomend this link to anyone that needs some information about their vehicle. Using the Haynes manual I have and the repair guide on Autozone's web site, I was able to effectively trouble shoot my problem. I found that I had some bad wiring in the wiring harness. I repaired the wiring problem, and my old truck fired right up. Oh yea, about the vacuum lines at the back of the coil pack, turns out that this had nothing to do with the ignition system. Thanks again for your input.

Thanks for the feedback. That is a very helpful free service that AutoZone is providing.

Too bad, Ford doesn't see fit to support a similar open service site for its customers.