What to do about bogging on a Mazda Miata?

What to do about bogging on a Mazda Miata?

With the engine warmed up disconnect the pig tail wire of the O2 sensor from the main engine wire harness. Repeatedly and quickly apply large amount of throttle. If throttle response is normal, replace the O2 sensor. For me, I still had the “bogging” and misfires.

What causes acceleration issues on a Mazda Miata?

From prior experience I know issues with the MAF (Mass Air Flow) can cause SERIOUS issues with acceleration. [Note: I was at Autobahn Country Club near Joliet, IL a few years ago and ran across the FIA rumble strips pretty aggressively on corner exit and jarred the piping connecting the air inlet to the throttle body loose.

What to do when your Mazda Miata starts from cold?

This normally occurs within two minutes with the engine started from cold, and can be observed by a noticeable drop in rpm at idle. With the engine warmed up disconnect the pig tail wire of the O2 sensor from the main engine wire harness. Repeatedly and quickly apply large amount of throttle. If throttle response is normal, replace the O2 sensor.

What is the Ohm on a Mazda Miata?

From the image below, Pins A & B are the variable resistor that changes as throttle is applied, and Pins C & D are the idle switch. Apply an ohmmeter across pins A & B, the resistance should decrease linearly as the throttle is opened. For me, I had 3.26k Ohm at idle and decreased linearly to 1.06k Ohm at WOT (Wide Open Throttle).

Why is my Mazda Miata bogging at 4000 rpm?

My issues were primarily below 4000 rpm, and after the engine had warmed up. Throttle response was seemingly normal across all rpm ranges with a cold engine. With a warm engine and above 4000 rpm the acceleration seemed normal. A warm engine is indicated by the O2 sensor sensing a warm exhaust manifold.

What does warm engine mean on Mazda Miata?

With a warm engine and above 4000 rpm the acceleration seemed normal. A warm engine is indicated by the O2 sensor sensing a warm exhaust manifold. The troubleshooting I’ve done here is specific to a 1.8L 1995 Miata, you may apply what I’ve done here for your application.

What to do if your car engine is bogging under acceleration?

A squirt of starter fluid at the boot while running will tell you. If it revs you have a vacuum leak. 2) the main jet is clogged (it could also be the main jet is too small but sounds like it was previously fine, so that’s unlikely) you’ll need to take the carb apart and give it a good cleaning.

What’s the throttle response on a Mazda Miata?

This is somewhat of a common problem for this generation of Miata. My issues were primarily below 4000 rpm, and after the engine had warmed up. Throttle response was seemingly normal across all rpm ranges with a cold engine. With a warm engine and above 4000 rpm the acceleration seemed normal.