Mazda B2200 engine runs very rough
#1
Mazda B2200 engine runs very rough
My Mazda B2200 1991 engine started running louder & rough recently. The acceleration was very poor. I had the truck towed home. The truck will crank, but the engine runs very rough/shakes. It will barely move if I "ride" the clutch in 1st gear. I haven't checked anything yet. If I mash the accelerator hard the engine rattles inside. Does anyone have any ideas on what to check? It is an extended cab 5-speed transmission with a carburetor.
#5
If timing belt jumps, then both the valve timing AND the ignition timing would be off. An easy way might be to check the ignition timing with a strobe timing light: if it's OK then the timing belt has not jumped.
Otherwise, most would pull off the drive belts and timing covers and rotate the engine so that the crankshaft gear is at TDC #1, but this can be done with the drive belts on, you may need a flashlight and a mirror. You can rotate the engine with a 21mm socket on the crankshaft bolt, will be easier if you pull the spark plugs first; maybe you can simply tighten the power steering belt temporarily and then use a socket on the PS pulley nut. See the woodruff key notch on the timing gear, where my red arrow points? That should point straight up at TDC #1. In my pictures, I've also painted lines at that position.
With the crankshaft gear pointing straight up, you can remove the top timing cover (several 6mm x 1.0mm bolts, one is longer) and look at the camshaft gear position. The Number "1" should be pointing straight up (painted yellow in my photo) - at the V-shaped mark - if the timing belt is correct.
Otherwise, most would pull off the drive belts and timing covers and rotate the engine so that the crankshaft gear is at TDC #1, but this can be done with the drive belts on, you may need a flashlight and a mirror. You can rotate the engine with a 21mm socket on the crankshaft bolt, will be easier if you pull the spark plugs first; maybe you can simply tighten the power steering belt temporarily and then use a socket on the PS pulley nut. See the woodruff key notch on the timing gear, where my red arrow points? That should point straight up at TDC #1. In my pictures, I've also painted lines at that position.
With the crankshaft gear pointing straight up, you can remove the top timing cover (several 6mm x 1.0mm bolts, one is longer) and look at the camshaft gear position. The Number "1" should be pointing straight up (painted yellow in my photo) - at the V-shaped mark - if the timing belt is correct.
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