flat spot

347 · #1 (**permalink**) 03-31-2003, 01:20 AM

i have 44mm idf's on my engine with 50 idle jets and 150 mains
it has a flat spot around 2500rpm and my plugs are black as black how do i fix the flat spot and stop my plugs from fouling up?

427Aggie · #2 (**permalink**) 03-31-2003, 07:17 AM

cal is probably the best to ask...not sure if IDF's have bypasses or not...but cal can answer that if he reads this one....you might want to repost with weber flat spot as a topic so it gets the weber peoples attention.

If IDF's have them what are you bypass valves set at...what are the idle holder size and what emulsion tubes are you running? The flat spot can be too lean or too rich...it sounds like you are running too rich but that could be caused by too much gas going into the cylinder.

Cal chime in here....

Matt