Skip the auto shop - Our mechanics make house calls

Q: engine is missing an surging an idle is rough - 1994 Mazda B4000

asked by on

I'm having missing an rough idle not running well at all no vaccum leaks I cleaned egr valve that helped a little it sounds like my coil pack but not sure I put new plugs an wires in it changed the running a little it doesn't effect my gas mileage at all it jerks going down the hwy an pings when I give it gas up hill this is my daily driver

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

A: Hello. This sounds like you have a lean run...

Hello. This sounds like you have a lean running engine. This can be from carbon build up on the valves and dirty or clogged injectors. Have the combustion chamber and injectors cleaned. Then see if the engine runs better. If you need help with this repair, a certified technician from YourMechanic can come to your home or office to diagnose the misfire and rough idle.

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・Save up to 30%

Get a quote

What others are asking

Q: shuts off after driving

If I was diagnosing your Hummer, I would want to know if there were any diagnostic trouble codes (DTCs) stored in any of the computer modules. I would see if the Check Engine light was on and use my scan...

Q: Should I change my transmission fluid.

I would not recommend changing the fluid or getting a flush on the transmission since you are already starting to have a problem. A service may make it worse at this point. I would have the transmission checked by a...

Q: Runs fine with the map sensor vacuum line plugged off

Hello, the map sensor is an input of engine load. When the map sensor is disconnected it will set a fault code which is emission base and check engine will come on,this cause the system to go into a default...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...