I have an 06 v thunder. Last year the coil was not firing. I replaced the coil and now have fire to the back cylinder, but don't seen to be getting gas to the back cylinder. The front cylinder runs. I have swapped spark plugs, so we know it is not a plug issue. Have sprayed fuel in the back cylinder and have got fire that way, no other way. Any ideas?

I am a dodge man not ford but as a test have you inverted the wires to the coil noing one side works if the same coil dosnt fire it probably be the coil if the oppaset dosnt fire i would guess it was in the wireing or a pick up just a thought good luck. also if it has a resestore? dodge hasballest kind of the same.

Check for spark at the plug ( may have coil problem).
If spark is good then do a compression check. Pressure shouldn't be less than 75% of known good cylinders.

Your car either has a 2.0L or the 2.4L 4-cylinder engine. All 4-cylinder engines are super easy to locate the cylinder orientation. Find the front of the engine where the belts are, the closest cylinder at the front of the engine is #1. Followed by #'s 2, 3, and 4 all in order. The firing order is 1-3-4-2, but that is only the order that they fire in, not there location. So #2 is the 2nd coil back from where the belts are.

I hope this info helps!
~subyguru~

try switching plug and or coil with another cylinder to see if misfire moves, you might have got a bad replacement part.

Backfiring and hard starting is almost always the result of bad engine timing. You don't say what model it is, but various causes are

- timing belt stretched and jumped a tooth (can't readily be seen)
- distributor drive gear replaced one tooth out (easy to do)
- spark plug wire misplaced on plugs

Take it easy with that starting fluid, you don't want blowback in your face

1 coil pack is for cylinder 1 & 3 . The 1st & 3rd....moving back from the belts. 1 is on the top, three on the bottm of the coil. 2 & 4 should be the same, 2nd cylinder, 2nd back from the belts & top on the coil pack. 4 the last plug & lowest on the second coil pack. PLEASE NOTE: , A Handyman's Service manual, from an auto store can VERIFY THIS. My last experience was with the 1987- 1991 GM "Quad" 4 engines. One of the other experts on "FixYa" corrected a mistake I made on a newewr model. SO I WOULD CHECK this advise to A MANUAL. I was wrong on the other one I answewred, & do not want to add to your frustration. I have looked around my textbooks, I do not have one on that car, I have given it away.

try switching the position of the two coils, the plug wires will unscrew off of the coils and that way you dont have to pull the spark plug wires too,(be sure and change the 2 wire couplers too) if your front cylinder stops firing you know its the coil, if the back cylinder still doesn't fire then your coil is good and you either have a bad #2 spark unit or a bad crank pulse generator.

Swap the spark plug wires and see it the moves from the front cylinder to the rear cylinder. Your Sportster should have what is known as a "dual fire" ignition system. This means that both spark plugs fire every time the piston comes to top dead center whether the cylinder is on the compression stroke or the exhaust stroke. This causes what is known as a "wasted spark", the spark plug fires on the exhaust stroke. I don't have any experience with bikes made after year model 2000. Most of these bikes are equipped with electronic engine controls that I don't care to learn about. I work on bikes made in 1999 or earlier. I feel pretty confident that Harley still uses the "dual fire" ignition but I'm not sure if they have any other sensors on the bike that would cause the problem you have. Try what I suggested and it may give you a clue as to the problem. Other than that, I have no other suggestions. Sorry I couldn't do more.

Good luck
Steve

G'day. I can help you here! On all early model japanese 4 cylinder motorcycles,
number 1 & 4 cylinders share one coil( the left hand coil as seen while sitting on bike). Number 2 & 3 cylinders shares the other.

L/H coil- 1 & 4
R/H coil-2 & 3

Hope this helps
Regards Andrew Porrelli

If the hi-tension wires check out ok you may want to check on the distributor and the contacts at its end and in the inside. You may also want to test the ignition coil.