eak jeep

Did the crank position sensor test good becuze it may look good but still ****ed

Fugatt2DrXJ

Yeah from how we tested it.

What's getting me is that both the donor jeep and this jeep ran before. I personally saw both of them running. The PO of this jeep slung a rod while wheeling. And the donor one wrecked. So why is nothing working now!?

When the engine blew could it have fried a fuse or the computer?

Or could when I lined the torque converter up with the flex plate can that be put on wrong?

The Haynes manual shows nor says anything like that.

Just throwing thoughts out there.
I just wish cars were like the hot rods with no computer and you just slap an engine in and it goes. Haha.

eak jeep

The toque converter position docent matter and it's possible a fuse could be blown I dout the computer fried let me ponder and I will tell you what I think

Fugatt2DrXJ

That's what i thought. Because I know the older jeeps the flywheel could only be bolted one way in order to balance it. But these seemed to be 4 equally spaced holes. I was wondering cause I know the Crank sensor reads spaces in the flywheel and if it was like the old ones that might mess up the timing.

And we began to wonder about the fuses yesterday. We checked them once but we're double checking now.

Cherockee

Let's recap what's been checked so far. It sounds like you're telling us it has air, fuel, and spark... which means it should fire up, unless of course the timing is wrong.

Get a test light and probe the green/orange wire going to any fuel injector. Watch it as you turn the ignition on and then crank. It should power up immediately as the key turns to ignition and stay powered up while cranking. If the power goes away after a couple seconds then you have a problem with a sensor (usually). If you never have power then it's possible you have a bad computer or blown fuse. The only sensors that would cut power to the fuel injector would be the cam sensor or the crank sensor, and they would do this via the ECM.

The TC has three sets of 4 holes and can only be bolted on one way. I don't think that is your problem. Review what you have and don't have and report back.

Fugatt2DrXJ

I did notice while checking the fuses yesterday that I am missing the #18 mini fuse. Its a 15 Amp that controls the coil rail and injectors. Heres the link. #18 is the one if youre standing at the front and looking at the PDC, the 1st column on the right 3rd one up. This one is sideways so bare with.

http://www.lunghd.com/Tech_Articles/...tification.htm

Only delima is i have a distributor not coils packs like on 2000's and up.

And yes i have all of those. Ill probe the injectors tomorrow and check back. And thanks for the comfirmation on the flywheel.

eak jeep

I just checked a buddy's 99 xj he has that fuse is both terminals for the fuse in their or just one

Fugatt2DrXJ

I've been meaning to check my other one too. One I'm gonna punch myself if that's it. And what do you mean both terminals?

eak jeep

If you look in dome fuse slots it will only have 1 terminal that means it's not used

Fugatt2DrXJ

Well come to find out it has no terminals. But I also noticed the the #26 fuse is not there. Which according to that is the power amplifier. Any clue as to what that does/is?

car5car

I was repairing cars for 20 years.
1. Get computer/engine wiring diagrams for both years. I found 2000 (like 99, I think) and 97 (like 96)
2. Find difference.
3. Transfer all different parts, make sure, it is possible first.
It seems you don't know much about diagrams, so go to a dealer, directly to mechanics, give mechanic $10-20 and talk to him.
Also it would be a good idea to ask dealer parts guys if heads and blocks are the same for both years.
If you have self pick up parts junk yard close to you, go and look.

How much do you want for your Jeep? What is your zip code? Junk yard will give you about $200 for your Jeep.

Cherockee

Just to help clear some questions up, most of the differences between the two engines is the style of plugs for each sensor and fuel injectors. It'd be nice to see a pic of the engine in the vehicle to see which design intake is being used.

One of the confusing things about '99 XJs is mid year they went to multi-coil/distributorless design with a different head. That can make a hugh difference in wiring. Another reason it would be nice to see some pics to see what exactly we're dealing with.

It's my opinion that we have an early '99 model vehicle with a '96 motor in it. There is still a chace the cams are different (96 was first year of OBDII) but that shouldn't effect us too much. Hopefully the '99 intake was used, as well as all sensors, fuel injectors, coil, distributor, and accessories.

As for missing fuses, if you're concerned about them (an amplifier fuse isn't gong to make your jeep run), put a 10amp in every open slot you find. Then check all the others to be sure they're not blown.

eak jeep

The amplifer power fuse is on the power shut down circut pop a fuse in what ever size Is recommend in you service manual

Fugatt2DrXJ

I've got pictures for everyone now. And today we tested the crank sensor and injectors. The crank sensor has 1.7 continuity which if I'm not mistaken its not suppose to have any and when it does its gone bad. Correct? If so I'm replacing that. And the injectors were random. They would read sometimes then sometimes it wouldn't. We got very few volts out of the reading when they did respond.

Here's the pictures....

The last one from the Haynes manual and it says the temp sensor controls timing as well. My radiator isn't connected yet because we were only going to start the engine then immediately stop it once it would. Then work on all that. Would this seriously mess it up?

Cherockee

Looks just like what I thought it would... early '99.

If the sensors are not feeding the correct signal to the ECM it will cut power to the fuel injectors after a few seconds. I think to be on the safe side you should replace the crank sensor and see where that puts us.