killer454
11-26-2010, 06:27 PM
i have a 400ex 2000 and i just put a new intake manifold on it and rejeted the carb.The carb is runing real good throttle response is perfect,wot is good.
my problem is this:when the engine is at idle it idles fine for 15-20 seconds then it misses one time then idles perfect for about 15-30 seconds and does it again.
this is just a slight miss i dont understand it,this atv is running real good just the miss at idle.
atv has these mods and jets now:
.020 11-1 piston
hotcams stage 1
no lid
uni filter
stock header
pro-circuit t-4 pipe
i just rejeted today and installed a new intake on this atv,here is the jetting:
pilot 38
main 170
needle on 4th slot down
i pulled the plug after the test ride and the plug was a cardboard color (tan)so i think i right on on the jetting.
can anybody tell me what to look at on this funny miss every 15-20-30 seconds?
it only has this one miss at idle if you rev the moter to 2000 rpms it does not miss at all.
i have checked all wireing and grounds
my problem is this:when the engine is at idle it idles fine for 15-20 seconds then it misses one time then idles perfect for about 15-30 seconds and does it again.
this is just a slight miss i dont understand it,this atv is running real good just the miss at idle.
atv has these mods and jets now:
.020 11-1 piston
hotcams stage 1
no lid
uni filter
stock header
pro-circuit t-4 pipe
i just rejeted today and installed a new intake on this atv,here is the jetting:
pilot 38
main 170
needle on 4th slot down
i pulled the plug after the test ride and the plug was a cardboard color (tan)so i think i right on on the jetting.
can anybody tell me what to look at on this funny miss every 15-20-30 seconds?
it only has this one miss at idle if you rev the moter to 2000 rpms it does not miss at all.
i have checked all wireing and grounds