Skip the auto shop - Our mechanics make house calls

Q: Engine mifiring at higher RPMs, tachometer spiking up

asked by on

The engine in my car starts misfiring when higher RPMs are reached. At 2200 RPM on average, the issue happens and the tachometer starts spiking up. As I was told the problem might be the distributor, I had it replaced but the issue remained. I had the crank sensor replaced as well. The problem still persists. Do you have any idea what is the cause and what I should check next? Thanks.

A: Try to replace the ignition module and coil...

Try to replace the ignition module and coil which is mounted top right side of the motor. The ignition module supplies the tach signal and the coil supplies the spark to the plugs. It is a good idea to replace both as a set since a coil can burn out the new module.

This should fix the problem. Make sure you have a fresh set of wires and plugs also with a new distributor cap and rotor. If you need help with this contact a certified mechanic who can diagnose the cause of your misfire and fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuses keep blowing out

I think you may be correct. There are hundreds of wires behind your dash that could potentially intersect and cause problems. Most likely, two different circuits that run different amounts of amperage have intersected, and are now causing circuitry issues....

Q: Car not starting right way.

Hi there. I have seen this quite a few times on this vehicle. Mazda has a technical bulletin for it since it comes up so much. You need to install new spark plugs that have a higher heat range as...

Q: Random misfiring. Check engine light is on. Running real rough. Bad PCM?

Hi, thanks for writing in. There are several malfunctions that can cause a rough running condition. The spark plugs could be an issue, but it could also be a problem with the ignition, a fuel supply problem, or even a...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...