Orodreth
NAXJA Forum User
- Location
- Greenville, SC
I have a 90 XJ and I have no fire coming out of the coil.
Coil is branspankin' new.
WTF IS WRONG?!
Anyone?
Coil is branspankin' new.
WTF IS WRONG?!
Anyone?
-
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No fire coming out of brand new coil in 90 XJ HELP
- Thread starter Orodreth
- Start date
Orodreth
NAXJA Forum User
- Location
- Greenville, SC
God, I hope it's not that.
I might check with the local graveyard and see if I can grab one off another one.
I might check with the local graveyard and see if I can grab one off another one.
5-90
NAXJA Forum User
- Location
- Hammerspace
Use an analogue voltmeter.
Key in RUN - you should see 12VDC to the coil terminals.
Cranking - you should see the meter needle waver about.
If you're not getting 12VDC to the coil, it won't saturate. If the voltage doesn't turn off when cranking (on/off/on/off/on/off...) it won't fire. The coil fires because the magnetic field built up while the coil is powered collapses - meaning the power to the coil has to turn off before you can get a spark. That's why the two tests.
I've yet to figure out an effective way to test those ignition modules, but it's on my list of things to do.
Key in RUN - you should see 12VDC to the coil terminals.
Cranking - you should see the meter needle waver about.
If you're not getting 12VDC to the coil, it won't saturate. If the voltage doesn't turn off when cranking (on/off/on/off/on/off...) it won't fire. The coil fires because the magnetic field built up while the coil is powered collapses - meaning the power to the coil has to turn off before you can get a spark. That's why the two tests.
I've yet to figure out an effective way to test those ignition modules, but it's on my list of things to do.
5-90
NAXJA Forum User
- Location
- Hammerspace
doodahman said:Propane/CNG conversion and older distributer. I wish.
assgas:
Doesn't change anything - coils for LPG/CNG are the same as for gasoline (unless you've changed them.) I did the industrial mechanic thing for a while, and worked on plenty of LPG/CNG engines...
offroader461
NAXJA Forum User
- Location
- peoria, arizona
im having the same problem..mine just all of a sudden quit...i replaced all the usual parts and still cant seem to get it to fire??
in2fords
NAXJA Forum User
- Location
- Lincoln City, Oregon
5-90 said:
Yeah but he wouldnt need the ignition module. Just use a mallory unilite like the one I have for when I convert over.
Orodreth
NAXJA Forum User
- Location
- Greenville, SC
The guy that owned it before I did (Ironman Jeep parts in Pumpkin town, SC) said that it was the Crankshaft Sensor that needed to be replaced.
I sent my dad on a run to Advance to grab one for me.
Now the only problem is getting under there to replace it.
I'll keep you posted!
I sent my dad on a run to Advance to grab one for me.
Now the only problem is getting under there to replace it.
I'll keep you posted!
Orodreth
NAXJA Forum User
- Location
- Greenville, SC
I replaced the ckp sensor and it started right up!
I was such a pain. I had grease up past my elbows. I was pretty much black on my arms.
I also have a problem with the engine racing when I start it.
It'll start and then race up to 3500 rpms. Any suggestions?
I was such a pain. I had grease up past my elbows. I was pretty much black on my arms.
I also have a problem with the engine racing when I start it.
It'll start and then race up to 3500 rpms. Any suggestions?
Orodreth
NAXJA Forum User
- Location
- Greenville, SC
Thanks guys.
