Here is the old post.
http://www.mazdas247.com/forum/showthread.php?123837379-Bucking-3000-rpms-under-acceleration
Thought I would pass it on to those who said they had similar problems.
Car would buck/jerk at 3000rpms when it was warm.
Replaced plugs, wires, and coil packs and helped but did not fix the bucking.
Cleaned map? in intake and no help.
Later the car started making a knocking/ rattle and the problem got a little worse.
The knock was on the passenger side of the engine.
Checked vavle clearance and 3 valves were .001 too much. Book said .009-.011. 2 were at .012 and one at .013. Talked with a fer mechanic friends and they said
that shouldn't make a loud knock/rattle.
I noticed the cam marks "I" & "E" were not prefect and the timing belt seemed sorta loose.
Tore it apart and found the
-tensioner spring was elongated.
-tensioner pulley had a very very slight wobble and when I shook it I could hear the ball bearings were loose. ( i guess you can simply replace the tensioner bearing cheaply but the pad that the retainer bolt sits on was worn) replaced both tensioner pulley and idler pulley and spring (all in 1 kit from autozone)
- replaced timing belt and correctly set all marks.
-timing cover was completely worn through ( looks like the water pump pulley was rubbing)
Fired it up and knock/rattle was gone
Could not get it to buck after it warmed up.
Hope this helps those who had the same problem
http://www.mazdas247.com/forum/showthread.php?123837379-Bucking-3000-rpms-under-acceleration
Thought I would pass it on to those who said they had similar problems.
Car would buck/jerk at 3000rpms when it was warm.
Replaced plugs, wires, and coil packs and helped but did not fix the bucking.
Cleaned map? in intake and no help.
Later the car started making a knocking/ rattle and the problem got a little worse.
The knock was on the passenger side of the engine.
Checked vavle clearance and 3 valves were .001 too much. Book said .009-.011. 2 were at .012 and one at .013. Talked with a fer mechanic friends and they said
that shouldn't make a loud knock/rattle.
I noticed the cam marks "I" & "E" were not prefect and the timing belt seemed sorta loose.
Tore it apart and found the
-tensioner spring was elongated.
-tensioner pulley had a very very slight wobble and when I shook it I could hear the ball bearings were loose. ( i guess you can simply replace the tensioner bearing cheaply but the pad that the retainer bolt sits on was worn) replaced both tensioner pulley and idler pulley and spring (all in 1 kit from autozone)
- replaced timing belt and correctly set all marks.
-timing cover was completely worn through ( looks like the water pump pulley was rubbing)
Fired it up and knock/rattle was gone
Could not get it to buck after it warmed up.
Hope this helps those who had the same problem
