Jpocolypse
Well-Known Member
I have a 98 Accord LX with the 2.3L engine and an automatic transmission.
Before I get into the details of the misfires let me give you some possibly relevant backstories. About a month ago the CEL came on with the code P1491 (EGR valve insufficient lift) but after about a week the light went out on its own. Then about 2 weeks ago i filled up the car on my way home from work and it was running fine. I didn't drive the car for a few days, but the next time I drove it it felt like the engine cut out for half a second and it would do that about once per trip which is about 12 miles. After about 2 days of that I thought it probably has bad gas so I topped it off with 2 gallons of premium and it helped a little. Then I got it down to about a third of a tank of gas and topped it off with premium. After that it was running perfectly... for about a week. then when I was coming back home from work the car didnt want to get up to 60mph so I kept pushing the gas pedal further and further until it was floored, but still not accelerating. Then the CEL started flashing (it was off prior to this) so I shut it off and pulled over off the road. I used my phone to pull the codes and this is what it said:
Current Fault: P1491-Powertrain: EGR Valve insufficient lift - from CEL in backstory
Current Fault: P0301-Powertrain: Cylinder 1 misfire detected
Current Fault: P0302-Powertrain: Cylinder 2 misfire detected
Current Fault: P0304-Powertrain: Cylinder 4 misfire detected
Current Fault: P0300-Powertrain: Random/Multiple Cylinder Misfire Detected
Then today I went to pass someone and it got up to about 64mph (According to the speedo) usually it shifts at that point but it just hung there for about a second then the CEL started flashing again. My phone didn't show any new codes because I never cleared them the last time so it just showed the same thing as above. When I got home I used my phone to clear the codes then on my way to work I ran it hard to see if I could make it happen again and after about the third time having it floored it didn't want to shift and the CEL started flashing. Below is the codes and the freeze frame data from when it happened
codes:
Current Fault: P0301-Powertrain: Cylinder 1 misfire detected
Pending Fault: P1399-Powertrain: Cylinder 1 misfire
Freeze Frame:
Fuel Status: 0 byte
Engine Load: 96.86%
Coolant temp: 197.6F
Fuel Trim Bank 1 short term: 0%
FTB 1 Long term: -1.56%
Intake Manifold Pressure: 14.21 psi
Engine RPM: 5,357 rpm
Speed (OBD): 56.54 mph
Intake Air temperature: 75.2F
Throttle Position (Manifold): 89.8%
Other Possibly relevant information:
The car has 244700ish miles on it
The distributor was replaced within the last year
The Transmission fluid was replaced a few months ago with the genuine Honda stuff the manual calls for
Has a new air filter
Spark plugs and wires should be in good shape (checked them around the time it was having EGR problems)
Compression is around 165 psi in all cylinders (tested at the same time I checked the spark plugs)
The car is green
Before I get into the details of the misfires let me give you some possibly relevant backstories. About a month ago the CEL came on with the code P1491 (EGR valve insufficient lift) but after about a week the light went out on its own. Then about 2 weeks ago i filled up the car on my way home from work and it was running fine. I didn't drive the car for a few days, but the next time I drove it it felt like the engine cut out for half a second and it would do that about once per trip which is about 12 miles. After about 2 days of that I thought it probably has bad gas so I topped it off with 2 gallons of premium and it helped a little. Then I got it down to about a third of a tank of gas and topped it off with premium. After that it was running perfectly... for about a week. then when I was coming back home from work the car didnt want to get up to 60mph so I kept pushing the gas pedal further and further until it was floored, but still not accelerating. Then the CEL started flashing (it was off prior to this) so I shut it off and pulled over off the road. I used my phone to pull the codes and this is what it said:
Current Fault: P1491-Powertrain: EGR Valve insufficient lift - from CEL in backstory
Current Fault: P0301-Powertrain: Cylinder 1 misfire detected
Current Fault: P0302-Powertrain: Cylinder 2 misfire detected
Current Fault: P0304-Powertrain: Cylinder 4 misfire detected
Current Fault: P0300-Powertrain: Random/Multiple Cylinder Misfire Detected
Then today I went to pass someone and it got up to about 64mph (According to the speedo) usually it shifts at that point but it just hung there for about a second then the CEL started flashing again. My phone didn't show any new codes because I never cleared them the last time so it just showed the same thing as above. When I got home I used my phone to clear the codes then on my way to work I ran it hard to see if I could make it happen again and after about the third time having it floored it didn't want to shift and the CEL started flashing. Below is the codes and the freeze frame data from when it happened
codes:
Current Fault: P0301-Powertrain: Cylinder 1 misfire detected
Pending Fault: P1399-Powertrain: Cylinder 1 misfire
Freeze Frame:
Fuel Status: 0 byte
Engine Load: 96.86%
Coolant temp: 197.6F
Fuel Trim Bank 1 short term: 0%
FTB 1 Long term: -1.56%
Intake Manifold Pressure: 14.21 psi
Engine RPM: 5,357 rpm
Speed (OBD): 56.54 mph
Intake Air temperature: 75.2F
Throttle Position (Manifold): 89.8%
Other Possibly relevant information:
The car has 244700ish miles on it
The distributor was replaced within the last year
The Transmission fluid was replaced a few months ago with the genuine Honda stuff the manual calls for
Has a new air filter
Spark plugs and wires should be in good shape (checked them around the time it was having EGR problems)
Compression is around 165 psi in all cylinders (tested at the same time I checked the spark plugs)
The car is green
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