Loud poping noise in engine

[Mark Olson]

look man I'm telling you my left coil is on cylinder 1 and 2 and my right on is on 3 and 4 and it ran perfectly fine, I know how cylinders fire. why the hell would i make that up. I'm trying to take back as much advice as I can get but when yea don't listen to how I know my bike is set-up then nothing gets accomplished here. Hell i can even plug the wires back up and start it and send you a picture and video, would that prove my point to yea that i know what I'm talking about

Well , now you know why it ran like shit.  you where only running on two cylinders.

A motorcycle engine uses a different ign firing than a car.  the coil fires one of the cylinders on compression and the other on exhaust as it rotates 180 degrees and does it again for the one that fired on exhaust now fires on compression.

A simple check is to touch the exhaust pipes next to the head one at a time while the engine is running , the ones that are hot are firing, cool ones are not.

wire it back up as the group has suggested left coil 1-4 right 2-3 or do it your way as you have the only fj on the planet with this weirdo wiring, and do the test.

I would recommend new spark plugs to be sure they are good.

perhaps you should read the tune up section of your manual and then proceed. 

 

[Flying Scotsman]

All you have to do is listen.
My coil wires have #s on them dont yours.Coil 1 is 1 and 4 plugs.Coil 2 is 2 and 3 plugs.You have it wrong if you have coil 1 on 1 and 2 plugs and coil 2 on 3 and 4 plugs.

[rktmanfj]

but when yea don't listen to how I know my bike is set-up then nothing gets accomplished here.

Shame on you guys!         

Randy T
Indy

[irishluck]

no there are no numbers

[Buster]

perhaps you should read the tune up section of your manual and then proceed. 

 
[/quote]


 

[racerman_27410]

    Irish..... not trying to be a dick but........

you would be well advised to pay attention and not be so combative since we all have great running FJ's and you WANT yours to run great (which it presently does not.)

Obviously we know some things that you dont eh ?


KOokaloo!

[ddlewis]

this thread needs to go to the humor section because I am lmao! 

[racerrad8]

   Irish..... not trying to be a dick but........

you would be well advised to pay attention and not be so combative since we all have great running FJ's and you WANT yours to run great (which it presently does not.)

Obviously we know some things that you dont eh ?


KOokaloo!

Frank, unfortunatley we already covered all of this in one of his many other posts...

Marsh, I think he is stressed, getting bashed by us when the PO did the super quality work and left him with a sub standard bike. That would drive me batty (homicidal) . The older the bike, the more crazy and numerous the PO's are found. Bugger the PO's!!!!

That's all fine and dandy that he is "stressed", but I think he has turned/pissed off those that have a great amount of experience by his reply posts of those offering assistance.

His posts are condescending, rude and basically tell those who have tried to help him to date: Nope, you don't know what you're talking about.

The ironic part of it all is the fact I look at the picture, after reading all of his posts, for just a few seconds and it appears the in-line valve the "PO" installed is closed. It might let a little bit of fuel by, but it would likely run out causing the bike to "die"...

This website is a great source of information and people willing to help, but 99% of the time the answers are "spitball" answers trying to narrow the problem because no one explains things the same way.

From there the receiver of that "help" should not be condescending telling someone "it's common sense", "okay boss let me explain this a little easier for ya", and finally "better? good".

And now after I respond there is a valve in line; "hold on, there is a valve on it and it does shut the fuel off when needed."

Maybe, he can turn around the many he has alienated and get the assistance he needs, but again, by the tone of his replies; we'll have to see what happens.

Randy - RPM

[1badfj]

alright you all think what ya want, since im the irish guy full of shit and dont know jack

The truth finally comes out from the person who knows him the best.

[Pat Conlon]

.....wire it back up as the group has suggested left coil 1-4 right 2-3 or do it your way as you have the only fj on the planet with this weirdo wiring, and do the test. I would recommend new spark plugs to be sure they are good.

Irish, listen to Mark. Try it.  What do you have to lose?
However, if you do HAPPEN to have a rare crossplane crank Yamaha motor, you could do some serious damage to the valves if you followed Mark's advice....

[irishluck]

.....wire it back up as the group has suggested left coil 1-4 right 2-3 or do it your way as you have the only fj on the planet with this weirdo wiring, and do the test. I would recommend new spark plugs to be sure they are good.

Irish, listen to Mark. Try it.  What do you have to lose?
However, if you do HAPPEN to have a rare crossplane crank Yamaha motor, you could do some serious damage to the valves if you followed Mark's advice....

possibly busted valves, im guessing the only way to actually check this would be to look at the crank


look i wire it ur guys way and see what happens and let ya all know tonight around 8

[Travis398]

book says to line the crank up to position number 1, ive done that.
Its says that cylinder one, which im assuming is when your sitting on the bike its on the far left of the engine, if so then i have an issue, the book says that the cam lobes should both be pointing outwards, mine are both inwards and the far right cylinder which im assuming is number 4 is pointing outward.

Am I just wasting my time here? notice #4 was outward and #1 inward. Then you rotate the crank one more revolution and this time #1 outward and #4 inward.

A quick check would tell you that cylinders 1 and 4 are at TDC at the same time. (just a different stroke)

Turn the crank half a turn and cylinders 2 and 3 will be at TDC.

since cylinders 1 and 4 are going up and down at the same time the same coil needs to fire them.

if you put the coil on 1 and 2 cylinder 2 will fire when the piston is all the way down.

It's okay if you have no clue about motors. but still you should know the coil needs to fire on the compression stroke near the top.

So check your motor and tell me is cylinders 1 and 4  at the top at the same time or 1 and 2 at the top at the same time?  

[weymouth399]

book says to line the crank up to position number 1, ive done that.
Its says that cylinder one, which im assuming is when your sitting on the bike its on the far left of the engine, if so then i have an issue, the book says that the cam lobes should both be pointing outwards, mine are both inwards and the far right cylinder which im assuming is number 4 is pointing outward.

Am I just wasting my time here? notice #4 was outward and #1 inward. Then you rotate the crank one more revolution and this time #1 outward and #4 inward.

A quick check would tell you that cylinders 1 and 4 are at TDC at the same time. (just a different stroke)

Turn the crank half a turn and cylinders 2 and 3 will be at TDC.

since cylinders 1 and 4 are going up and down at the same time the same coil needs to fire them.

if you put the coil on 1 and 2 cylinder 2 will fire when the piston is all the way down.

It's okay if you have no clue about motors. but still you should know the coil needs to fire on the compression stroke near the top.

So check your motor and tell me is cylinders 1 and 4  at the top at the same time or 1 and 2 at the top at the same time?  

 

[irishluck]

ok

[rktmanfj]

Am I just wasting my time here?

Survey says...     YES!     

Randy T
Indy