A little while ago my engine was misfiring on all cylinders, dealership told me cap and rotor and plugs need to be changed. I did all of that and even tested my wires. everything seemed good for a few days then that light came back on, code read cylinder misfire again. I cant figure out whats wrong! ne ideas?
Then i also told them that it was overheating, well my gauge will start to go all the way up then stop and comeback down then up again and all over the place. their solution poor more coolant in well no luck it started doin it again. i pressured checked it for leaks none, so i changed the thermostat no luck. ne ideas?
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Re: Overheating and Misfiring 98 civic dx
Try a radiator flush with new coolant. Radiators tend to get clogged with **** and it can lead to the problems your talking about. What color are the tips of you plugs when you take them out. Have you had the codes read on the ECU?
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I would recommend testing the fuel injector if you are certain the spark plug and wire are functioning correctly. If the fuel injector is good run a compression test. If the compression tests fails motor is bad. Could also be an electrical problem if the motor tests good and only does this when the check engine light pops on. Might be a bad ecu.
I've had problems of overheating previously where my car's thermostat would hit 140. I think I've fixed the issue, I've replaced the thermostat but it was still doing that and 2 hoses blew and needed to be replaced. I've had to consistently fill my radiator with 50/50 antifreeze on a daily basis to ensure it won't overheat, so far that seems to be keeping the peace.
But now as of 5 days ago, I'm experiencing these new issues of stalling. Upon taking my civic into my mechanic, his meter showed that there was a misfire in the 2nd cylinder a month prior and now all 4 are misfiring. He thought it was the head gasket at first. I had just recently replaced the spark plugs with NGK Platinums, new spark plug wires and a new distributor cap.
I've received many possible culprits to my problem consisting of possibly the Throttle Position Sensor, Fuel Filter/Injection, Distributor or a radiator cap. I'm financially strapped at the moment and only could afford the radiator cap which didn't solve anything, however my radiator is running on 80% water at the moment. I'm really at a loss and I feel like I've done what I could and I'm at my wits end. Please help my poor little Civic cheat death for a little longer.
It looks like misfiring in one cylinder. That is why check engine come on. Misfiring can be due to spark plugs/wiring/worn distributor cap. Maybe also vaccum leak and clogged injectors (use injector cleaner).
You can read the trouble codes at Autozone store for free
Please kindly let me know if this infor was usefull for you or you need more infro
misfiring can cause a P0420 code.
I would recommend a set of honda plug wires and plugs if the P0420 code returns.
I have used bolt in aftermarket bolt in catalytic converters but don't remember the brand name they fit ok and i have had 1 or 2 return with a P0420 code out of about 20. I have never replaced the oxygen sensor on a civic like yours.
I always fix the misfire problems, reset the computer, and have the customer drive it and see if the code p0420 returns. 50% don't have the P420 code return. drive it and see what happens and go from there.