Model GLC040AUNUAL083 SN: N494080
Mazda FE Engine
this lift has been giving me fits off and on for a long time now,has a miss/hesitation off idle to mid range RPM where the engine runs rough and stumbles......seems to clear up for a few weeks or so then comes back again,has been like this for over a year now,it has a new regulator and lock-off and air mixer Diaphram on it,it has had a remanded head put on it,it has a new distributor on it(SMH) and new plugs and wires.....it just had the head gasket replaced as it was blown( less than a year after head was done).....today I was there for the same miss issue....checked and removed the air filter(was plugged) just as soon as I took air filter out I started it and it ran GREAT no miss even in tilt bypass loaded it didn't stumble at all,customer said they would get a new air filter and install,well they just called and said that after a while of running it the miss came back?........any ideas????........