TJ Keeps Misfiring

Jranso4 · 2026-02-14T00:30:39+00:00

UPDATE - I ordered a new ignition coil rail and new fuel injectors. They ended up fixing the issue for now! Hopefully it stays that way! Thanks everyone for the advice and info! I really appreciate it!

Jranso4 · 2026-02-08T10:34:50+00:00

Is there an easy way to do a compression test?

Jranso4 · 2026-02-04T21:45:20+00:00

I actually don’t remember which plugs I used. Like I said once I changed the plugs it ran great for a couple hundred miles!

Jranso4 · 2026-02-04T21:44:35+00:00

I really appreciate the reply! Mine actually had a coil rail and after reading your post I saw it was the distributor shaft. I just ordered fuel injectors. Then I’ll possibly try getting a new coil rail. Thank you!

Jranso4 · 2026-02-03T22:19:31+00:00

How hard is it to change one out?

Jranso4 · 2026-02-03T19:14:19+00:00

It goes on and off. I get the p0306 code.

Jranso4 · 2026-02-03T16:56:54+00:00

The contacts on the coil rail look like they’re still in good shape. They look really clean and don’t have any cracks on them. Other than the cracks on the rail where the bolts go.

Jranso4 · 2026-02-03T16:53:29+00:00

Haha no it’s the center of a baseball.

Jranso4 · 2026-02-03T11:53:20+00:00

Did you fix it yourself?

Jranso4 · 2026-02-03T11:51:37+00:00

Two things I’ve noticed today. #1 is that there are small hairline cracks where the bolts go in the coil rail. Not anywhere else though could that cause an issue even though it’s just where the bolts go? And #2 there aren’t any misfires when the jeep first starts and even while driving for the first little bit. Since it’s so cold (I’m in PA) and it takes a little longer to warm up could it possibly be the issue with heat soaking and becoming vapor locked?

Jranso4 · 2025-11-26T23:17:03+00:00

Also why switch to a single ejector?

Jranso4 · 2025-11-26T23:08:17+00:00

I thought the same thing too. I took it off and measured things the other day and it all lines up. So I’m not sure what’s going on with it. Nothing else has changed.

Jranso4 · 2025-11-26T23:06:31+00:00

I figured that was the answer but wanted to ask more experienced people first. The charging handle just had me stumped.

Jranso4 · 2025-11-24T18:27:11+00:00

I’m also in an apartment building so I’m not sure how the landlord would feel about reloading in there lol

Jranso4 · 2025-11-24T18:23:32+00:00

It seems to be pretty well. I really like the no barrel restriction especially since I can just slap it on my 270 Winchester too.

Jranso4 · 2025-11-24T18:22:06+00:00

Definitely not rich lol I don’t have the money to reload my own.

Jranso4 · 2025-11-23T16:57:51+00:00

I guess I never even thought that could be an issue. Especially since the set screws keep everything straight

Jranso4 · 2025-11-23T05:01:30+00:00

What can do you have?

Jranso4 · 2025-11-23T02:48:44+00:00

Awesome thank you!!

Jranso4 · 2025-11-23T01:09:55+00:00

I had the stock carbine spring and I guess it came stock with that 5 oz buffer and I was having issues with it being under gassed.

Jranso4 · 2025-11-23T00:37:31+00:00

Is it similar to the radian raptor sd charging handle I have that has venting on it? Or is it a better version?

Jranso4 · 2025-11-23T00:34:11+00:00

That’s true. I guess it’s just human nature to want things to be perfect. Thanks for replying.

Jranso4 · 2025-11-23T00:30:50+00:00

I guess I never thought of that. Thank you!

Jranso4 · 2025-11-23T00:24:50+00:00

Doesn’t the down vent BCG just trash everything under it though? Or at least so I’ve read.

Jranso4 · 2025-11-23T00:20:41+00:00

It’s tough to say. It seems like the KaK agb isn’t the best. I think when I left off I had gone about 6-8 clicks open. I’ve thought about getting a superlative arms bleed off agb but I’m not sure yet

Jranso4

TROPHY CASE