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Rough idling, codes: P0300, P0301, P0302, P0303 and P0304

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
Not a tranny problem, most likely a bad injector if you have good spark and compression in number 5 cylinder. Try to hold a long screwdriver to the injector and see if you can feel it clicking, compare to the other injectors. Also make sure the injector is getting power and flashing a ground when running if you can access it.
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Tuesday, October 16th, 2018 AT 10:33 AM (Merged)
Tiny
MIKE412
  • MEMBER
  • 3 POSTS
Thanks for the advice. Tried what you said and it felt like it was clicking open just like the one next to it, but maybe it needs to be under load, since that seems to be when it acts up. If I can get a loaner tool fronm the store down the street i'll try to check the compression. Does the car need to be cold when I try this, like when you change the plugs? And what am I looking for as far as #'s for good compression?
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Tuesday, October 16th, 2018 AT 10:33 AM (Merged)
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
Your looking for the same results from all cylinders within 10 percent and yes do it cold
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Tuesday, October 16th, 2018 AT 10:33 AM (Merged)
Tiny
VTXRIDER48
  • MEMBER
  • 1 POST
  • TOYOTA CAMRY
2002 Camry LE, 113,000 miles, 4 Cyl. Automatic Trans.

When I accelerate the car shutters like the transmisssion can not find the right gear to shift to & the check engine light comes on. My code reader displays P0304, misfire Cyl. 4. I have changed the spark plugs and check the transmission fluid. Could this be the fuel filter? What next?
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Tuesday, October 16th, 2018 AT 10:33 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check the compression at least in that cylinder, and also the injector, is gas being sprayed thru the injector?
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Tuesday, October 16th, 2018 AT 10:34 AM (Merged)
Tiny
SCHSTORM21
  • MEMBER
  • 1 POST
  • 2000 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 127,000 MILES
I have a 2000 Camry that had the check engine light come on. Code came up P0301 for a misfire in the first cylinder. Suggestion was to change the spark plugs and wires. I also smelled a sulfur smell which made me think the catalytic converter. My question: which should I change first to see if it fixes the problem?
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Tuesday, October 16th, 2018 AT 10:34 AM (Merged)
Tiny
STEVEW84
  • MECHANIC
  • 673 POSTS
The misfire will cause the cat. Converter to prematurely fail. The misfire needs to be fixed before anything else.
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Tuesday, October 16th, 2018 AT 10:34 AM (Merged)
Tiny
MIRABAL1
  • MEMBER
  • 1 POST
  • 1999 TOYOTA CAMRY
Toyota Camry 1999 V6, 158,000 miles, Auto,

Car has the following codes: P171, P0300, P0301, P0303, P0305.

Changed sparkplugs, coils and cables and did fuel injection cleaning with machine.
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Tuesday, October 16th, 2018 AT 10:34 AM (Merged)
Tiny
FISHERMAN
  • MECHANIC
  • 937 POSTS
Hello!
Codes:
P0171 System too Lean (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0305 Cylinder 5 Misfire Detected

Check clean:
IAC Valve (idle air control valve)
EGR (exhaust gas Recirculation)
Oxigen Sensor bank 1 (before cat. Conv.)
MAF sensor (mass air flow sensor)

Those codes are sensor related.
After check and clean process erase codes and see which one return.

Let Us Know!
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Tuesday, October 16th, 2018 AT 10:34 AM (Merged)
Tiny
LOSTINMARS
  • MECHANIC
  • 222 POSTS
99% chance the airflow sensor is bad.
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Tuesday, October 16th, 2018 AT 10:34 AM (Merged)

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