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’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.
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).
Is the 2003 Mazda MX-5 Miata a good car?
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Why did my a / C fail on my Mazda Miata?
Too often, preventive maintenance is used by mechanics, and especially dealers, to screw the owners. Last year, the A/C failed on the Lexus. I was told by a mechanic that I needed a new evaporator and stuff, and the cost was $1,200.
When did the Miata cooling system come out?
The Miata cooling system is described on pages E-2 through E-14 of the 1990 Miata Factory Workshop Manual, and much of the material below, including illustrations, is taken from that manual. Model years beyond 1993 have a number of differences, but the basic troubleshooting procedures should be similar.
What happens when the timing belt breaks on a Mazda Miata?
On some cars, if the timing belt breaks while the engine is running, you can cause extensive damage to the engine. Basically, on some cars, when the timing belt breaks, a piston can come into contact with the valves and damage both, the piston (s) and valve (s).
Can a bad alternator cause a Miata not to start?
A bad alternator can cause your battery to lose enough charge to start your Miata. It may have had enough energy to get you home, but when you go to start the vehicle, there’s not enough stored energy for the engine to turn over. 3. Starter The next thing to look at when your Miata isn’t starting would be the starter itself.
Is the MX-5 Forum part of miata.net?
MX-5 Miata Forum is part of Miata.net. If you haven’t yet visited Miata.net, or are not yet familiar with it, please go there first. There is a wealth of information and it will be very helpful to be familiar with its offerings before becoming involved in the forum. Miata.net also has a brief intro for new users.
What should the fuel pressure be on a Mazda Miata?
Connect a fuel pressure gauge (About $60 at your local auto parts store) to the high pressure fuel line. The high pressure fuel line is the rearmost of the two metal lines (passenger side of engine), pictured. Pictured below is the pressure I read off the fuel pressure gauge. The Haynes manual states between 32-38 psi is normal, at idle.
Why are the spark plugs on a Miata not straight?
The ceramic insulator on the spark plug has straight sides – not ridges like the factory NGK plugs. As a result, the rubber boots on the spark plug wires sometimes grabs the ceramic insulator so tightly that the boots stay behind when the wires are removed.
What to do if your Mazda Miata wont start?
You may also try cleaning the MAF by putting it in a large GLAD bag with alcohol and shake the bag to completely coat the MAF. Remove and be sure to let COMPLETELY DRY before re-installing otherwise you may damage the internal electrical components if you try and start the car before dry.
Where is the high pressure line on a Mazda Miata?
Connect a fuel pressure gauge (About $60 at your local auto parts store) to the high pressure fuel line. The high pressure fuel line is the rearmost of the two metal lines (passenger side of engine), pictured. Pictured below is the pressure I read off the fuel pressure gauge.
Why does my Miata stop when I Turn Off the engine?
It stops instantly when the engine is turned off. At speed, the sound either goes away or is masked by road noise. It seems to be worse when the weather is cold and gets a little quieter when the car is at operating temperature.
What should I do if my Mazda Miata makes a noise?
Newer Mazda pads have reduced this problem. Look at the color of your pads, green are older and blue are newer (both have the same part number so ordering new pads is not easy). A4: We usually put high temperature anti-seize on the back of the pad.
Is the Mazda MX-5 Miata a good car?
HANDS DOWN BEST INEXPENSIVE SPORTS CAR MADE. A tad over 100,000 miles and runs like new. Decent power for a little 4 banger. Great gas mileage. Have the automatic tranny and shifts and runs like a dream. The paint on these years are fantastic and probably the best paint I’ve ever seen on a car in my lifetime.
Are there any leaks in my Miata shocks?
My shocks are fine, no leaks, etc. A: The control arm bushing could be dirty or worn and needs cleaning or replacement. In my Miata, the bushing itself was in good shape and required no replacement. The mechanic cleaned both the right and the left bushing. I paid for no parts. Return to Table of Contents
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 kind of engine does a Miata LSX have?
The standard conversion uses an LS3 not unlike the powerplant you’d find under the hood of a fifth-generation Camaro SS, while the optional 525hp upgrade uses Chevrolet Performance’s LS376 crate motor, good for 525 horsepower and 486 lb-ft at 5200 RPM.
What’s the standard idle speed for a Miata?
Factory spec for the Miata specifies standard timing as 10� before top dead center (10� BTDC) �1� at idle speed (850 rpm). If your timing is advanced more than this, you may experience pinging under some conditions.
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 should the ignition timing be on a Miata?
The piston is already beginning to travel back down the cylinder when the combustion occurrs. The piston is therefore travelling a shorter distance under power which translates to power loss. The timing on a stock Miata should be set to 10° before top dead center (10° BTDC) ±1° at 850 RPM idle speed.
What kind of engine does a Mazda Miata have?
In the old days, that would’ve taken a transmission switch and a wire to the bulb. Possibly two. The whole thing is designed to work as a system. Replace any of those modern components with something else, and various control modules freak out. Replace the engine of a 2016 Mazda MX-5 with a 525-hp Chevrolet V8, and they lose their damn minds.
Which is worse rough idle or perfect idle?
Very rough idle with a repetitive cycle that is smooth for a couple of seconds then misses badly, occasionally stalling. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating.
Very rough idle with a repetitive cycle that is smooth for a couple of seconds then misses badly, occasionally stalling. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating.
What’s the RPM of a car when it idles?
When the car starts it idles fine at about 1000 RPM. As soon as it warms up, it starts to idle rough, between 500 and 750 RPM. It almost quits running. As soon as you give the car some gas it runs just fine.
Can a car run fine at 750 rpm?
This problem has been getting worse over the last 2 years. When the car starts it idles fine at about 1000 RPM. As soon as it warms up, it starts to idle rough, between 500 and 750 RPM. It almost quits running. As soon as you give the car some gas it runs just fine.
What causes idle surges on a car ECM?
Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.
What’s the top speed of a Mazda Miata?
And it chases right up to a 123-mph top speed, 4 mph above our best first-generation Miata. Displacement remains unchanged at 1840cc, but a new cylinder head lifts output by seven horsepower to 140; torque is up just over four percent. Both outputs peak at the same revs as before, and the 7000-rpm redline continues.
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.
And it chases right up to a 123-mph top speed, 4 mph above our best first-generation Miata. Displacement remains unchanged at 1840cc, but a new cylinder head lifts output by seven horsepower to 140; torque is up just over four percent. Both outputs peak at the same revs as before, and the 7000-rpm redline continues.
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.
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 idle RPM control on a Miata?
The ISC system has two components exclusively dedicated to idle air / rpm control. Those are the ISCV and the AV (Air Valve). Other components play roles in the idle rpm, including the IAS (Idle Adjustment Screw), which is part of the throttle body. This screw may or may not be under a “Blanking Cap”.
Where can I buy a 1996 Mazda MX 5 Miata?
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Connect a fuel pressure gauge (About $60 at your local auto parts store) to the high pressure fuel line. The high pressure fuel line is the rearmost of the two metal lines (passenger side of engine), pictured. Pictured below is the pressure I read off the fuel pressure gauge.
Are there any problems with the Mazda Miata?
This next glaring problem with the Miata is slightly unfair on Mazda, as it’s something that seems to have happened regardless of the company’s marketing efforts. The vehicle has something of a poor reputation among male drivers, as it is seen as being a sports car for women.
Where is the pig tail wire on a Mazda Miata?
There is a pig tail wire leading from the O2 sensor and connected at the main engine wire harness near the upper part of the rear of the engine by the ignition coil. Wait for the engine to warm up. This normally occurs within two minutes with the engine started from cold, and can be observed by a noticeable drop in rpm at idle.