Engine misfiring and jerking?

Tiny
RECONSTRUCTOR
  • MEMBER
  • 1999 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 240,000 MILES
Missus up hill when I down shift takes off good missus at low rpm's. Take off seems to do a little better when it is cool in the mornings.
Thursday, July 11th, 2019 AT 4:21 PM

58 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

By any chance is the check engine light on? If you don't have access to a scanner/code reader your local auto parts stores have a tool loaner and will rent you one.Also,some auto parts stores will check the codes for free.Here is a tutorial showing what is involved:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

If the check engine light is on get back to us with the information so we can properly diagnose your car.Hope to hear from you soon.Thanks for using 2CarPros and hope this helps.

Danny-
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Thursday, July 11th, 2019 AT 4:29 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

I would start with the spark plugs and the boots. Common for worn plugs and leaking boots.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Injectors could also be the issue. Additives have no effect. They need to be cleaned professionally.

Make sure your filters are in good condition. Fuel and air.

https://www.2carpros.com/articles/how-to-replace-a-car-air-filter

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

Roy
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Thursday, July 11th, 2019 AT 4:31 PM
Tiny
RECONSTRUCTOR
  • MEMBER
  • 5 POSTS
Air filter is good. When I got the car the code reader said multiple misfire I put new plugs in it the miss stopped about 75 percent then 400 miles later it came back and that has been 7,000 miles ago. I put new plugs in it last week but it was the same I put used coils on it two days ago and didn't change it.
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Friday, July 12th, 2019 AT 2:02 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, used coils is never a good idea.

I would start with checking both the compression and the fuel pressure.

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Roy
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Friday, July 12th, 2019 AT 2:48 PM
Tiny
RECONSTRUCTOR
  • MEMBER
  • 5 POSTS
What about MAF sensor?
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Friday, July 12th, 2019 AT 2:57 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Will not cause a misfire. It would also code.

Roy
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Friday, July 12th, 2019 AT 3:01 PM
Tiny
RECONSTRUCTOR
  • MEMBER
  • 5 POSTS
I put a new air filter in it it ran fine for 10 miles and the check engine light went out but then right back at missing again. Then I put a new air filter in it and it didn't change (drove it to auto parts store).
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Sunday, July 14th, 2019 AT 2:09 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The air filter will not cause a miss.

You need to follow the suggestions I posted before as a start.

Roy
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Sunday, July 14th, 2019 AT 2:14 PM
Tiny
GLARRYG
  • MEMBER
  • 2 POSTS
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 119,000 MILES
After my car warms up, I get an occasional misfire and my service engine light comes on. I had the code read and it was diagnosed as a misfire. I was told to change the plugs/wires. I changed the plugs, pcv, airfilter, ordered the wires and disconnected the battery to reset the service light. It ran like new for a few days, then it started acting up again with the service light coming back on. I still havent received the wire set. I only use bp, shell or mobil gas.
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Monday, August 10th, 2020 AT 10:33 AM (Merged)
Tiny
KIRIT56
  • MEMBER
  • 1 POST
  • 1999 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Toyota carolla 99, code p0420, p0300;p0302;p0303.
Replaced ignition coils, spark plugs, gas cap, but stiil I am getting check light for same code
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Monday, August 10th, 2020 AT 10:33 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
This guide will help us fix it

https://www.2carpros.com/articles/engine-misfires-or-runs-rough
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Monday, August 10th, 2020 AT 10:33 AM (Merged)
Tiny
TOSHNGATIA
  • MEMBER
  • 1 POST
  • 1998 TOYOTA COROLLA
  • 269,380 MILES
I have recently replaced the pressure plate, clutch, Release bearing, Master & slave cylinders. All was well until driving in fifth the gear pops into neutral especially above 3000 rpm. Been advice to replaced the pressure plate again which maybe weak. The clutch pedal has also become too soft after replacement unlike the way it was, any helpful tips are welcome thanks.
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Monday, August 10th, 2020 AT 10:35 AM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Sounds like a mechanical problem in the clutch, did you machine the fly wheel, just to be on the safe side, get a mechanic to road test he will be able to say if it is clutch shudder or not.
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Monday, August 10th, 2020 AT 10:35 AM (Merged)
Tiny
RASBAJAN
  • MEMBER
  • 4 POSTS
  • 1997 TOYOTA COROLLA
  • 157,000 MILES
My car was not starting and I had the distributor, spark plugs and wires replaced, I got the car back but in less than a week the car suddenly started shutting off when the car was idled. I took the car back to the mechanic who diagnosed the car and replaced the following parts: catalytic converter, exhaust manifold, amp sensor, coolant sensor, thermostat, thermostat gasket, crankshaft sensor and fuel filter. The engine light was on for almost six months before I took the car to the mechanic. The car is now jerking really badly when I reach between 50 and 60 mph, if I take my foot off the gas there is no jerking, it only happens when my foot is on the gas. Thanks.
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Monday, August 10th, 2020 AT 10:36 AM (Merged)
Tiny
RASBAJAN
  • MEMBER
  • 4 POSTS
I forgot to add one thing which is the car makes a thump noise when this happens and I can feel it when my foot is on the gas pedal.
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Monday, August 10th, 2020 AT 10:36 AM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Is CEL on?
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Monday, August 10th, 2020 AT 10:36 AM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Is the jerk rhythmic or random?
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Monday, August 10th, 2020 AT 10:36 AM (Merged)
Tiny
RASBAJAN
  • MEMBER
  • 4 POSTS
The jerk feels like a hiccup and feels like the car is lunging forward. I drove the car this morning and could feel this "hiccup" when doing only 30 mph, but when reaching 50 mph it is louder and I can hear like a thump and feel it, when I take my foot off the gas it goes away. The jerk is more like boom boom boom, there is a pause after every boom.
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Monday, August 10th, 2020 AT 10:36 AM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
What about cap and rotor? Were they new? Lots of misfires are due to cap/rotor defects/moisture.
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Monday, August 10th, 2020 AT 10:36 AM (Merged)
Tiny
DJCL
  • MECHANIC
  • 767 POSTS
When at idle try misting water from a spray bottle over the ignition system. Distributor cap and wires. See if this makes it run poor. If so I would start thinking ignition wires even if they are new, distributor cap/rotor and coil. Have the wires checked well. They are known to do this. Around the boots. Look for burn marks. I also think you may want to bring this back to the person that did all that work. After changing all the parts I would think this car should run well.
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Monday, August 10th, 2020 AT 10:36 AM (Merged)

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