Legocar

K, changed plugs, wires, cap and rotor. Will not start now just cranking. Started fine before...... Checked a few things but not sure what all to check , any suggestions!

jakbob

Check your firing order.

NewJerseyXJ609

Make sure you put the rotor in correctly also. Check for spark! You need three things. Fuel. Air. Spark.

Programbo

As suggested make sure you have spark and if not see how far along the line the power stops. I guess you checked all the easy stuff but just to make sure there are a number of fuses and relays that can blow whenever messing with anything electrical.

ckysodkorn_xj

in order for an internal combustion engine to run it needs 4 basic things fuel air spark and compression. check for these. check fuel by 1. listning for fuel pump when you turn the key to the on position 2. get a fuel presser testerand test the fuel pressure at the fuel rail spark 1. pull a plug hold it close to something metal wilth wire on it have a buddy crank the jeep see what color it is blue is good orange is no good possible need a coil compression get a compression tester and make sure u have compression in the cylinders.

freegdr

This ^^^^dont over think things ....

OEJ

def do this first. and if you need to check for spark pull the plug wire off of the plug then crank it over hold the wire near the block or plug. no need to pull the entire spark plug out.

not sure if thats what ckysodkorn xj ment by pulling the plug;...lol. but still no need for that. plug wire will yeild same results.

jakbob

Or just check firing order. Just pulling the plug well tell you if you have spark, won't tell you the right order though.

lookin2wheel

Coil wire to dizzy cap installed? Even if the firing order was wrong, it will still TRY to fire. Itll just stumble, cough, spit and backfire. If the coil wire is not connected, nothing will happen, the motor will just turn and turn, wont fire up.

lookin2wheel

Going WAY too deep into the weeds there. Check the obvious.....plug/coil wire(s)

chipmaker

Bet you pulled all the wires of at one time didnt you?
I place my bet on firing order. Sometimes if it is off just right it will not hit at all. I had the same problem witha V-dub I was working on a while back, racked my brain for an hour or so before my dad (old school VW guru) came out and took one glimpse and said "Firing order is wrong dummy"

Radi

I've done that and not just once!

PNWjeeper

Did that just a couple days ago myself. I disconnected it to get a better look at the engine mounts, forgot to plug it back in and later on in the day had to leave and it wouldn't start.

freegdr

Must be running by now ...

Agent_Oragnge

4 things Homie. Fuel. Air. COMPRESSION. Spark.(all properly sequenced together) coming from years of working on the most basic internal combustion engines ever manufactured... the 2 Stroke.