Questions tagged [random-misfire]

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Any insights or tips on 2012 Mini Cooper S Coupe Random Misfires?

UPDATES 2: I ended up changing the HPFP which I got from eBay for half, the ignition coils, oil filter, air filter, spark plugs, and I put in the bypass for the faulty airbag sensor (all thanks to ...
Tommie C.'s user avatar
  • 533
0 votes
2 answers
46 views

MAF and MAP location

I have a 2000 Pontiac sunfire se 2.2 I’m having trouble locating the MAP and MAF sensors. The mechanic I took it to said he can’t work on my car cause it didn’t stall enough while driving my car.. ...
Christie Holstein's user avatar
0 votes
0 answers
48 views

ECU problem Daihatsu Sirron M3 1.0

Daihatsu Sirion M3 1.0 Petrol Engine misfire and 3 random cylinder not working. Coil is working, but not checked the injectors. I bought an identical ECU on eBay, but not working.
Darsha Seneviratne's user avatar
3 votes
2 answers
1k views

Purpose of camshaft position sensor (CMP) vs crankshaft position sensor (CKP) without VVT

On a vehicle with variable valve timing (VVT), the need for a camshaft position sensor (CMP) is obvious. However, on an older engine without VVT, what purpose does the CMP serve? The position of the ...
masospaghetti's user avatar
0 votes
1 answer
281 views

troubleshooting Cylinder 2 misfire on Toyota MR2 Spyder

I am dealing with Cylinder Misfire p0300/P0302/P0304 codes on my Toyota MR2 Spyder and trying to get to the bottom of the issue. Here is what I have tried so far: Changed all 4 Spark plugs Changed ...
Asdfg's user avatar
  • 111
1 vote
2 answers
1k views

how long does it take to erase OBD codes after unplugging the battery

I have been dealing with Engine Misfire codes (P0300 to P0304) on my 2003 Toyota MR2 Spyder. I changed the spark plugs and engine coils. That did not clear the codes. I used OBD scanner to erase the ...
Asdfg's user avatar
  • 111
0 votes
0 answers
68 views

2016 Hyundai 70k miles, engine just replaced, now has an engine mis

I have a 2016 Hyundai Elantra that just had it's engine replaced 1k miles ago. After getting it back, at 400 miles the engine started to have a mis. Here are the details... When sitting at a stop ...
Tony's user avatar
  • 1
0 votes
0 answers
414 views

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 ...
Altimus Prime's user avatar
4 votes
2 answers
14k 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 ...
Geremia's user avatar
  • 207
1 vote
1 answer
40 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 ...
Chris's user avatar
  • 905
2 votes
0 answers
20 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 ...
Ed Yancy's user avatar
1 vote
0 answers
280 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 ...
David Scheiber's user avatar
1 vote
0 answers
846 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 ...
Kevin Amsden's user avatar
4 votes
2 answers
5k 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 ...
Robert Stiffler's user avatar
3 votes
1 answer
232 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 ...
endolith's user avatar
  • 1,351
2 votes
0 answers
92 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 ...
cde's user avatar
  • 603