4.0 swap

[splogue]

This might be on the site somewhere but after searching for the pat hour, it thought I would ask.

Pin 30 -Parking/neutral safety switch- on a 94 Jeep Cherokee should be XXX when trying to start? XXX = ground or 12VDC

I have the engine in, harness hooked up and get nothing when trying to start. I have the Hotwire Auto harness and this is what looks to be holding the process up. When I turn the key I get fuel pump for 3-5 seconds then nothing. If I jump the starter It turns over.

It seems I am missing a signal for something and I think this might be it.

Sean

By the way is CJOFFROAD.COM down for good.

 

[Rosco1974]

Sound right. The are two Brown/Yellow wires (pin30 and gear select switch) that tie together at the starter relay. I have the Factory Service Manual for a 93, it it helps. Should be the same. Send me your email and I will send it over.

 

[splogue]

email

splogue1@gmail.com

thanks

 

[splogue]

Found a free FSM download for a 95 XJ. Pin 30 on the PCM needs to be grounded.

It provides the ground to the starter relay. Will try that tomorrow.

Sean

 

[bigwalton]

Did you get it going?

 

[PAPPYWAHO]

This looks like a good place to ask a question. I have donor 4.0 out of a 1995 Grand Cherokee and it has these letters painted on the side if the eng. Anyone know what these letters would represent.

 

[bigwalton]

This looks like a good place to ask a question. I have donor 4.0 out of a 1995 Grand Cherokee and it has these letters painted on the side if the eng. Anyone know what these letters would represent.

referring to the length of spark plug wire needed at each spot??

 

[PAPPYWAHO]

referring to the length of spark plug wire needed at each spot??

I don't think so. The letter behind the distributor cap is also a `D'. Same as the two out board letters. I don't have clue why they are there.

 

[bigwalton]

Wild. Wonder if it was rebuilt and had something to do with that? The repeated use of letters makes no sense to me...

 

[splogue]

starter

Pin 30 now has a ground.

Starter gets 12VDC when trying to start. Starter is brand new and tested good. When I try to start it, it does nothing. I put the test light on the 12VDC source on the starter and then a random ground, tested good.

WHY IS THE STARTER NOT SPINNING? I used the same wires and battery to bench test the starter, again tested good. Swap out the brand new solenoid with the old one (which worked when I took it off). NOTHING.

I am about done with this swap. Lucky I have to leave again soon which will help keep me from setting the whole thing on the curb for the trash man!

Sean

 

[bigwalton]

If you've bench tested the starter and it's seeing 12V, there has to be something in the motor itself or the clutch/flywheel. That has to be mechanical, it's not a wiring thing if a working starter won't turn.

Dumb question, is it the starter that came with the motor? Just curious if you got a new one that's somehow not right and won't work.

 

[splogue]

starter

It is a new starter the is for the 258 flywheel. I used the old starter before to turn over the engine about a month ago. Made sure that part numbers matched (3209).

I am going to turn the engine over by hand tomorrow.

Then going to bench test the entire starter system at once. I might just buy new cables because I need one that is longer than i currently have. Other than that I have no clue.

Sean

 

[bigwalton]

Have the old starter to try?

 

[Pathkiller]

I've seen letters like that when someone has done a compression test on the engine. Although in this case I have no idea what sort of code they might have been using. I would use something like "G for good", "B for bad". Or High Low and Medium, HLM. No idea what yours could mean.

 

[splogue]

Guess what the jeep lives. Rewired all the grounds after bench testing the start

er. Fired right up.now to get it together, I have basically four good weekends before I leave for awhile.

 

[bigwalton]

Awesome!! Congrats!