Check for vacuum leak, lean fuel condition, incorrect spark or cam timing. Check for aftermarket 'performance upgrade' parts without corresponding computer modifications.
On the engine family .. LTK 3.0 T5 FCC1 there is no PVC valve on 1990 Mazda MPV
yes you can its a straight swap you don't even have to change engine mounts
NO. Gates belts has a list. This engine is not interference.
1.6 Liter Straight 4
The purpose of that switch is to prevent the engine being started while in gear - when the switch is operating correctly, the engine will only start while in the park or neutral settings. You would not want your vehicle to lunge forward while the engine is turning over. With a manual transmission you should be able start the engine in any gear as long as the clutch pedal is fully engaged.
I had the same issue with a 1990 Mazda 626 and replacing the timing belt cured it.
1.6L Engine = 3.6 quarts
Unfortunately, a 1997 Toyota Supra engine and trans would not fit into a 1990 Mazda Miata. The Supra engine and transmission are unable to be mounted correctly within a Miata to make them fit.
The 1990 model of Miata came with a 1.6L DOHC engine and produced around 120 horsepower.
110 or 145 horsepower depending on which engine option.
behind the radiator,in the middle of the engine
At the rear of the engine, directly in the center, just above the transmission. If you look to the right of your firewall, you can find it by tracing the left heater hose down to the back of the engine. This answer is applicable for 1990-2005 Mazda Miatas.