strange problem and cannot figure out how to fix

[cheezehead69]

i have a 99 shee with pipes boost bottle and a tors removal kit. all of a sudden when i was riding it it began to sputter at full throttel. so i changed the spark plugs and gas. then i took the cards out and cleaned them completey and still does the same thing. now the quad idels and strarts good but under any load it it sputters and spits and wont rev up. if anyone has any ideas that would be great.

 

thanks

[CadillacBanshee]

Between last time you rode it and now, what have you done to it?

[cheezehead69]

since i rode it last i changed the plugs cleaned the carbs and replaced all the gas to try and fix the problem.

Edited April 14, 2006 by cheezehead69

[cheezehead69]

do you guys think it could be the coil

[dirtplay1975]

if you didnt do any mods immediately before this problem happened, I would try a new set of spark plug boots, if the resistor inside goes bad itll cause a misfire under load. Also it could be a coil but go for the cheap parts first and try the boots

[lowriderb]

also check the reeds..

[Wallrat]

There's kinda a process when ur trying to diagnose engine problems. Personally I like to start with the easy (and free) shit first.

 

Start it up and hold your hand near the exhaust outlet. The one that doesn't have anything coming out is the one you need to focus on. First off switch plug wires to opposite cylinders to see if it changes sides.

 

 

Have you done a compression check?

Edited April 14, 2006 by Wallrat

[cheezehead69]

i have not done a coprestion test yet. both cylanders are fireing at an idle because there is exaust coming out both sides. i will start by trying the spark boots and wires first. then the coil. what should my comprestion be. and when i check the reeds what should i be looking for. thanks

[Wallrat]

Before buying anything its a good idea to rule out as much as you can. No sense in replacing the plug wires if they're not the problem. Compression will depend on your elevation.

[cheezehead69]

i think i might just start trying parts off of my buddies sheeand hopfully i can find the problem.

[cheezehead69]

so i fixed the problem it was a loose wire on the coil. it was touching just enough to run fine at an idle but when you opened her up it would not make a good contact. thanks for the help guys