Ok I have a 79 CJ7 I just recently purchased. Today when I went to get gas after I gave the CJ a workout pulling some tree tops around for me to cut up for fire wood it decided not to start. Never had an issue with it to date. But this time I cranked and pumped the throttle and nothing but cranking and no fire.
Being at a gas station already I went in and got a bottle of starting fluid. Shot it down the carb and cranked. Still no bang so its pointing me to spark. I can tell the dist. cap and coil are very old. So I'm guessing this is it. But after quite a bit of cranking and pumping the gas it decided to fire. Got me home but I could tell it didn't feel like it has over the past few days. So my question is... am I on the right track or am i missing something with this inline 6.
There's a lot of things that can go wrong with the spark. Most recently with mine the ignition control box has been going out, the replacement part for it isn't worth anything. I can be driving down the road and it will just die, i'll go out and beat on it and she'll start right back up. Bad to do it when it gets to warm, or cold, or damp... you get the point. That could be your problem though, it just cranked after it cooled off. But it would be a very smart idea to replace dist top, rotor, wires... check out the TeamRush upgrade.
that's what i've been debating, but you have to careful about the HEIs, there's a huge argument about it, main problem being cam gears getting destroyed by cheaper HEI gears, many suggest using the DUI or MSD versions, they seem to have a lot less trouble. But you should have the duraspark system already, it would be easier just to upgrade it, no switching distributors.
If he gets the parts from the junkyard he will spend around 30dollars for coil and the better GM 4 pin HEI module.
Unless he buys a motorcraft or BDW ICM, I wouldn't waste any money on the duraspark system.
The duraspark ignition was the biggest headache on Grammys CJ. Every two years or three it fry a ICM and or coil. I got so tired of it. (15 years or working on it I put at least 4 complete systems on it) The distributor is good and not the weak link. If I wouldn't have had a MSD6a and coil to slap on the CJ after my failed junkyard HEI swap I would have went the stealth HEI route and never looked back. I built one out of the fried module and tested it.
I bought the msd in 1991 and used it on various things. It's still going.............when it stops it will get the stealth HEI and TFI coil.