Skip the auto shop - Our mechanics make house calls

Q: engine misfire. 1995 Toyota Corolla

asked by on

the engine skips while driving but not at an idle. it can drive at any speed but every once in a while it will cut out for a second. I have replaced the wires, plugs, cap rotor, and all internal components of the distributor. I also replace the fuel pressure regulator . when it first died it kept misfiring and then died. it was only when I replaced the insides of the dist the tit ran again and usually when cold it starts and runs fine and then it starts to miss. I can drive for miles and no problems and then a bunch of misfires. has mechanics confused? it passed smog with only a slightly high Co reading but nothing anyone could pinpoint​.

My car has 180000 miles.
My car has an automatic transmission.

Hello. These types of issues can be hard to diagnose. Most of the time they are caused by a failure within the distributor itself. Also common is the shaft being slightly worn, which will cause the RPM reading to be off at certain times and lead to the vehicle performing like this. I have also seen the fuel pressure drop off from a bad fuel pump or clogged fuel filter cause misfires, so these should be checked also. If you would like to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the misfiring problem and have this properly corrected.

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: I have a hunting/high idle.

Hello. An irregular idle can be caused by many things. If the idle speed appears to stabilize with the throttle position sensor then it may be possible that the throttle position sensor is the source of the issue. The MAP...

Q: Check Engine Light and code for O2 sensor

Hello. Knowing the actual code number would help determine the problem. If you are getting an O2 sensor code associated with the way it is running, then the sensor is more than likely bad. On this Toyota, the O2 sensor...

Q: Loud sound near muffler

It is very possible that a loose heat shield could be the issue. The engine mounts should also be expected, as a collapsed or separated engine mount will change the exhaust geometry, and could cause the exhaust to contact items,...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.