Skip the auto shop - Our mechanics make house calls

Q: MY CAR HESITATES WHILE DRIVING & TAKES AWHILE TO SPEED UP

asked by on

MY CHECK ENGINE LIGHT CAME ON AND COMPUTER READ OUT SAID "MISFIRE IN CYLINDER #1 DETECTED" AND SAID I NEEDED NEW IGNITION COIL. I INSTALLED 4 NEW IGNITION COILS. WEEK LATER - I INSTALLED 4 NEW SPARK PLUGS. RIGHT AFTER THAT - I NOTICED MY CAR WAS RUNNING A LITTLE ROUGH. TOOK CAR BACK IN TO GET ANOTHER READING AND IT READ THE SAME AS BEFORE. A DAY LATER - MY CAR WENT INTO A REALLY WEIRD HESITATION PROBLEM WHILE DRIVING. CHECK ENGINE LIGHT STARTED BLINKING - MY RPM GAUGE WENT CRAZY - MOVING UP AND DOWN (THE NEEDLE) - THEN IT LETS ME SPEED UP AND ITS OK. CHECKED ALL PLUGS & THEY ARE GOOD. ALL 4 IGNITION COILS SPARKED. TOOK IT IN AGAIN FOR ANOTHER READING - IT SAYS CYLINDER 1 & 2 MISFIRE. WHATS NEXT - FUEL PUMP - THAT AIR SENSOR THING? I AM NOT A MECHANIC. MY HUSBAND INSTALLED THE COILS AND PLUGS. HE IS NOT A MECHANIC. CAN YOU HELP?

My car has 150000 miles.
My car has an automatic transmission.

If you are still showing misfires on the cylinders that you have replaced the coils and plugs then you need to swap the plugs and coils to other cylinders and clear codes then see what codes come back. If misfire is still to the same cylinders then you need to do a compression test on all the cylinders to see if the engine has good compression. If you lost compression to the two cylinders then you may have blown the head gaskets between the two cylinders. You should have a cylinder leakage test done to see if there is a leak between cylinders. If there is then a head gasket needs to be replaced.

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
  1. Home
  2. Questions
  3. MY CAR HESITATES WHILE DRIVING & TAKES AWHILE TO SPEED UP

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: Shifter not working

Hello. Your tail lights and brake lights could be fixed by replacing the bulbs that aren't working. If that doesn't fix the problem, it is possible that there could be a problem with the fuses and relays. As to the...

Q: When I had my oil changed, dealer saw some leaking from the steering-said will have to have the 'rack' replaced @ $1500 sometime

The steering rack in your vehicle is connected to the tie rods and help stabilize the steering system. When there is slack in this or these become worn out, the rack will also put additional strain on your power steering...

Q: Dashboard shows OD off. How can I turn it on?

Hi, thanks for writing in. There is an OD button located on the gear selector or shift handle. Simply pushing this will turn the overdrive on or off which should cause the light in the dash to on or off....

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.