EddyMerckx
Member
- :
- 2003 Mazda Protoge5
At engine gradually started vibrating pretty badly, mainly when in Drive and braked, but slightly in Park too. Read the threads and got it checked out, the front and side mounts were bad. Replaced, $$.
Vibrated a lot less but still had bad rpms. Got is checked out, bad idle control motor, replaced, $$.
Also had bad coils last fall with misfires, replaced those and plugs then.
However, right now, after warming up, the engine has a constant 400 RPM, but the engine is vibrating a fair bit, causing the hood to vibrate too. Probably what wore out the mounts in the first place. Also have replaced a few other random things, and ran seafoam in the oil and gas for about 40 miles.
TLDR
Engine vibrates when idling in Drive.
New:
plugs, coils, idle control motor, EGR, 4x engine mounts, PCV valve, air filter.
Possible causes:
Vacuum leak? I actually can hear a slight hiss from the cabin but the mechanic said if I could hear it it was almost certainly heat/AC related not a vacuum leak. Checked the big hose from the air filter and there are no visible cracks.
Timing Belt? I bought this used last year, it has 135k on it, and I dont know if the timing belt was replaced at 100k. But got two quotes for $1k to replace it, and since I've already spent $1.5k getting it fixed so far, not really ready for that just yet.
Idle adjust? I don't know, maybe I should adjust the idle? Should I reset the idle?
Any tips? Any are appreciated!!
Vibrated a lot less but still had bad rpms. Got is checked out, bad idle control motor, replaced, $$.
Also had bad coils last fall with misfires, replaced those and plugs then.
However, right now, after warming up, the engine has a constant 400 RPM, but the engine is vibrating a fair bit, causing the hood to vibrate too. Probably what wore out the mounts in the first place. Also have replaced a few other random things, and ran seafoam in the oil and gas for about 40 miles.
TLDR
Engine vibrates when idling in Drive.
New:
plugs, coils, idle control motor, EGR, 4x engine mounts, PCV valve, air filter.
Possible causes:
Vacuum leak? I actually can hear a slight hiss from the cabin but the mechanic said if I could hear it it was almost certainly heat/AC related not a vacuum leak. Checked the big hose from the air filter and there are no visible cracks.
Timing Belt? I bought this used last year, it has 135k on it, and I dont know if the timing belt was replaced at 100k. But got two quotes for $1k to replace it, and since I've already spent $1.5k getting it fixed so far, not really ready for that just yet.
Idle adjust? I don't know, maybe I should adjust the idle? Should I reset the idle?
Any tips? Any are appreciated!!