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Howdy, I've been around this forum for a while. Long enough that I think it's time I start a thread for my build. Right now I'm a 17 year old in high school. I always been into cars. I've pulled motors, rebuilt them, and worked on cars for years with my dad. Right now I have some issues with the...

For clarification, you went from running rich to running lean just because of a change of spark plugs, wire, and ignition coil?

Could you take the switch apart and do a continuity test to make sure it's working correctly? If it's not your switch then check the motor that moves it and make sure it's getting power. If it is then I bet you just got a bad window motor.

What do you mean by maximize the travel?

That sounds awesome but I've never remotely heard of anyone doing that in these trucks, I would be very interested to see it done though!

If it's still not running I'd take a look at if you're getting spark, then it wouldn't hurt to go ahead and do a compression test and see what's going on in that department. Those compression tests can tell you a surprising amount. I assume you're getting fuel.

I did end up getting the new seal on and subsequently the flywheel, hopefully I'll be dropping it in the truck tonight. Again thanks for all of the help!

Yes! Thank you!

A special tool to install and remove it? Yeah if you think he would know how I'd love to hear his opinion!

So while putting timing chains in my 4.0 SOHC I got to the point of every 4.0 when you install a new rear main because it seems like these things go every 100k miles. But when I did I ran into this seal and it looks nothing like the others I've seen. It's got the metal thing around the crank...

Yep that fixed it. Now I just need to work out some kinks in the system

... after deciding to tear into wires and all that I pulled the PCM out for laughs.... and I think I found my problem.... this may not solve the spark issue but I'm almost certain that it's the ODBII problem!

Hey guys, in June I created a thread for my problem and it just kind of died and I also feel that I didn't have enough knowledge about the problem. But now I know more and I'd like to figure this out this time. I did a motor swap this summer, for my 2001 st and once I got the whole thing...

There is no spark and no fuel injectors

So how exactly do we know that PATS is the problem?

Its the same key and same PATS stuff. It shouldn't be a problem.

Not really. I grabbed some small black box out of it that I could find because a family friend suggested the same thing. But I don't believe it's anything like the ecu.

How do I check for that? Volt meter from the hot on the battery to where on the coil pack?

Do you mean the coil pack mounts? If so I'm so sorry I feel so dumb XD we always just called it the coil pack. Just see if the coil pack is getting a good ground?

Nope Where is that? How do I check for that? Thank you all for the help

Any idea's on how to test if the sensors are good?

I just ran out to the garage and put a continuity tester from the block to the battery ground. It's definitely good. Less than an ohm resistance

What do you mean by grounds? Like the grounds that tie the engine to the body?

They all seem good to go to my knowledge but yeah I had thought about that because I know the CPU won't let the ignition coil give spark if they aren't good to go, but I'm pretty sure they're okay. What I tried to do was hook up our code reader (which well let you see the rpms in real time on a...

Update: When I connect a OBDII computer I get a link error like it isn't connected. Could that mean this is a computer problem?