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Frustrated, can anyone help ?

596 Views 1 Reply 2 Participants Last post by  recievehead
Hey fellas, I did my slide stop kit, velocity stacks, bmc race filter, and ignition advancer a while back. I did it all at once, (me and my friend did the install) Anyhow after the installation the bike ran great with a custom map for the bike, but the bike never held such great idle, it was sputter on cold starts, when warmed up the idle would be high as 2,000 rpm...so i figured eh my throttle body might just be out of sync due to the slide stop kit, so i always put it aside, and the bike rode great, n i didnt have the tool to sync them, so now i figured eh might as well just drop it off to the shop and have them sync them..now the nightmare begins..they cant sync the tb, the bike is running like shit, cylinder 2 is running cold..spark and fuel is good, wut can cause this problem ?? coils are good, new plugs, i dunt know wut else can be the problem any help would be greatful =T
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There is no cut and dry answer but to get an accurate answer the proper tests need to be done. You should do a compression check on all cylinders for comparative purposes. They should all be within 10% of each other. If the compression is low the first place to start is the valve clearance, the easy stuff first. As far as the good spark good fuel, how was that determined?does it pick the cylinder up as the rpm increases? If the compression is good you need to put a vacuum gauge "carb sticks" on the throttle bodys to see if they are in sync. The best way to get definative answers on the running problem is to get some with a exhaust gas analasys machine and put a port in each header tube. Your Co levels will tell you what is causing the miss fire or not running at all.
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