95 Accord EX engine miss and sluggish under load
12-03-2013, 06:52 PM
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95 Accord EX engine miss and sluggish under load
I have a 1995 Accord EX, auto trans with 250K miles.
I was driving the other day and after engine warmed up it started running sluggish and when accelerator is pressed down it feels like it is flooding and running on three cylinders. At stop lights it shakes and feels like it is going to shut off, but it doesn't. When trying to accelerate it has almost no power and I had to tap and let off the gas pedal to drive it. I also hear a popping noise when it has the miss. It is quite abrupt and distinctive when it happens.
I came back home and looked over all the basic and obvious checks, everything looked normal. This has been one of the best cars I have ever owned, in the last 11 years I have only had to do very basic tuneup and oil changes and all the normal replacement items, brakes, tires, muffler. I did a spark plug, cap and rotor change and EGR cleaning, checked coil ohm values and they are ok, battery is good and alternator is putting out 14.3 V. The oil and antifreeze look good and no mixing, the spark plugs show the normal slight brown color as if they are burning normal. I was thinking that those tune up parts were worn because it has been so long since I last did it. None of that fixed the problem. When I drive it under load it is really rough. I also performed a compression test and it read #1 170 and bled down to 150 in 1 minute. #2 155 and bled down to 135. #3 160 bled down to 140 in 1 minute. #4 175 and bled down to 165 in 1 minute. I did a dry test and engine was slightly warmed up but not hot. It doesn't have a CEL on and there are no codes stored in the ECM.
Any help would be very appreciative.
I was driving the other day and after engine warmed up it started running sluggish and when accelerator is pressed down it feels like it is flooding and running on three cylinders. At stop lights it shakes and feels like it is going to shut off, but it doesn't. When trying to accelerate it has almost no power and I had to tap and let off the gas pedal to drive it. I also hear a popping noise when it has the miss. It is quite abrupt and distinctive when it happens.
I came back home and looked over all the basic and obvious checks, everything looked normal. This has been one of the best cars I have ever owned, in the last 11 years I have only had to do very basic tuneup and oil changes and all the normal replacement items, brakes, tires, muffler. I did a spark plug, cap and rotor change and EGR cleaning, checked coil ohm values and they are ok, battery is good and alternator is putting out 14.3 V. The oil and antifreeze look good and no mixing, the spark plugs show the normal slight brown color as if they are burning normal. I was thinking that those tune up parts were worn because it has been so long since I last did it. None of that fixed the problem. When I drive it under load it is really rough. I also performed a compression test and it read #1 170 and bled down to 150 in 1 minute. #2 155 and bled down to 135. #3 160 bled down to 140 in 1 minute. #4 175 and bled down to 165 in 1 minute. I did a dry test and engine was slightly warmed up but not hot. It doesn't have a CEL on and there are no codes stored in the ECM.
Any help would be very appreciative.
12-03-2013, 10:28 PM
#2
Re: 95 Accord EX engine miss and sluggish under load
Your numbers don't look necessarily bad however it shouldn't bleed down to anything unless your compression tester is bad. A compression tester is specifically designed to hold pressure until you hit the release button.
Regarding your issues my first guess is the oxygen sensor is bad, however I always suggest checking the exhaust and being sure you don't have an exhaust leak before replacing an oxygen sensor since if you have an exhaust leak it will kill the new oxygen sensor in no time.
Seafoam is a good way to check for an exhaust leak.
Regarding your issues my first guess is the oxygen sensor is bad, however I always suggest checking the exhaust and being sure you don't have an exhaust leak before replacing an oxygen sensor since if you have an exhaust leak it will kill the new oxygen sensor in no time.
Seafoam is a good way to check for an exhaust leak.
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