Mazda Forum - Mazda Enthusiast Forums - mazda 626 1999 engine shakes in drive idle HELP

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Kurt	10-24-2010 07:45 AM

mazda 626 1999 engine shakes in drive idle HELP

1999 mazda 626 2.0L 4cyl engine shakes horribly in idle in drive. have to put car in neutral when at traffic light..... changed spark plugs wires valve cover gasket (it was leaking), air filter, changed oil.... still shakes, not quite as bad, but still shakes... HELP!!

TonyL

02-26-2011 07:59 PM

Engine shakes

Possibly vacuum leak is causing shake check intake manifold gasket,check hoses,it may be a hose disconnected

ggsumo

02-26-2011 08:47 PM

what colour were the plugs you took out?

Are you using oil or fluids?

Does it run OK when moving?

When was it last services and was the fuel filter changed?

scott1616

03-04-2011 07:16 AM

egr valve probably

mazdaenthusiast

03-04-2011 11:47 AM

engine misfiring problem

Quote:

Originally Posted by Kurt (Post 112553)

looks like it is an engine misfiring problem. the probable causes of misfiring are damaged distributor cap, spark plug, or a burnt out valve.

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