Questions tagged [random-misfire]

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Testing whether engine stutter/hesitation is caused by catalytic converter

I have a 2005 Ford Expedition, from my dad, which stutters and hesitates to accelerate. Sometimes it barely has a problem and sometimes it's bad. It has new spark plugs and spark plug coils which the ...
3
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1answer
1k views

Can lack of oil cause P0300 Random Misfire?

I get OBD code P0300 Random Misfire (and no other error codes) on a very poorly maintained car. I changed the valve cover (whose spark plug well gaskets were degraded) and spark plugs, but the engine ...
1
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1answer
23 views

Intermittant Misfire Disagnosis - Plenum remove

I have a Mazda CX-9 SUV 2008, 3.7L engine version - just turned 300,000 KM. The CEL come on recently and the code pointed to the VVT solenoid on bank 2. There was also a misfire on Cylinder 2. I Ohm ...
2
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0answers
11 views

06 Sienna 3.3 has irritating random misfired, but no light

How can one go about troubleshooting occasional missing when no light or code is generated? This Sienna has 155k, and hasn't ever had a formal tune up, just good oil and air maintenance. The 3 rear ...
1
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0answers
87 views

Intermittent overheating and P0300 at high rpm

I'm hoping someone might have some insight as to what's going on here. https://youtu.be/rhZzZZyLbd4 This is a friend's 2001 Xterra that came in with an intermittent overheating issue. While trying to ...
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0answers
376 views

2002 Silverado 5.3 random misfire

I have an 02 Chevy Silverado 1500 4x4 with the 5.3 getting the po300 random misfire code. It idles great and drives fine if I baby it but as soon as it gets any load on it it starts to miss. I have ...
4
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2answers
3k views

Help identifying misfire conditon on 1998 Honda Civic DX

I'm struggling to identify the cause of a misfire condition in my 1998 Honda Civic. It has D16Y7 engine with 185,000 miles on it. The spark plugs, wires, distributor cap, rotor, and ignition coil ...
2
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1answer
127 views

Diagnosing silent misfires

2003 Honda Civic EX (~230,000 miles) has been giving me misfire codes for a while, mostly on cylinders 2 & 3, but sometimes 4. P0300 Random cylinder P0302 Cylinder 2 P0303 Cylinder 3 P0304 ...
2
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0answers
85 views

99 Camry, suddenly started not accelerating

My 99 Camry V6 suddenly (like 10 minutes after a normal drive) started having issues accelerating. If i am in park i can rev it and is fine up to 5000 rpm, but in drive, it now hesitates to accelerate ...