Hello All, I posted here a while ago about ignition system problems I was having on my '84 CJ7. Tried most everything I read and still couldn't figure out why my jeep would just shut off randomly like I had turned the key off, so I ended up putting in an HEI distributor. Now I can't get it to fire so I'm wondering if there are any common mistakes that happen when installing HEIs that I may have made. I now have good consistent spark on all cylinders but can't get it to fire, even with starter fluid. Tried advancing and retarding timing by turning the distributer. I took the fuel line off of the carb and it has gas up to it after trying to start it. When I checked the plugs, they look dry though. I would think they would be a little wet immediately after trying to start it for so long. Thinking maybe I'm not getting fuel into the chamber for some reason. When I wired the new distributer in I disconnected the ICM so I'm also wondering if that somehow cut power to the wires going into the carb. To hook up the HEI I just cut the power wire going to the ICM and then connected the hot wire running out of the firewall that used to go to the coil into the new distributer, and spliced in the exciter wire to the alternator. That is the way that I learned by watching a bunch of how to videos on Youtube so I very well may have been steered in the wrong direction but the HEI seems like it should be a fairly simple install. Any guidance is greatly appreciated.
Mikegass1
A simple way to do this is:
Driver side firewall, there is a 10 gauge red w/ white stripe wire (see picture).
Supply this power wire to the "BAT" terminal on your HEI.
This is good for your O.E. 4 wire Tach to work.
Nothing into the "TAC" terminal on your HEI.
Driver side firewall, there is a 10 gauge red w/ white stripe wire (see picture).
Supply this power wire to the "BAT" terminal on your HEI.
This is good for your O.E. 4 wire Tach to work.
Nothing into the "TAC" terminal on your HEI.
Attachments
Pull all your plugs and inspect them to see if they are wet, If so, clean and dry them and spin the engine to insure there isn't excessive gas in the cylinders.
Bring the engine to TDC. Use a small shaft to feel the top of the piston, rotate the crank back and forth till you feel the piston is at the top. Inspect your timing marks. You should be within a couple degree left or right of 0. If not, you may have a faulty harmonic balancer.
Move the crank to 5 before and check to see if the distributor wheel is aligned with the pickup. If not, then rotate the dist till you get it aligned. That should put you within a couple of degrees of your start timing.
Hook up your timing light and crank the engine. Adjust the timing so it fires at 5 before.
Tighten the dist, reinstall the plugs and wires.
Try starting the engine again.
Bring the engine to TDC. Use a small shaft to feel the top of the piston, rotate the crank back and forth till you feel the piston is at the top. Inspect your timing marks. You should be within a couple degree left or right of 0. If not, you may have a faulty harmonic balancer.
Move the crank to 5 before and check to see if the distributor wheel is aligned with the pickup. If not, then rotate the dist till you get it aligned. That should put you within a couple of degrees of your start timing.
Hook up your timing light and crank the engine. Adjust the timing so it fires at 5 before.
Tighten the dist, reinstall the plugs and wires.
Try starting the engine again.
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