Dear Forumers,

I need help, have run out of options.

My 2002 honda civic EX has been dropping in power/stalling/stopping on the highway after I drive for 30min or more. Its drops from 70mph to 10mph, and it will only drive ok after I sit the car down/stop/cool for at least 45min. The problem comes right back soon after i drive for 15min after cooling/stopping/resting the car.

This is what I have done so far.

1. I went to Honda dealer Ed-voyles honda and got a diagnosis
they told me the code was O2 sensor and it could also be the Catalytic converter

2. I changed both O2 sensors as well as the whole catalytic converter but the problem was not solved.

3. I came to this forum to find possible causes of this problem... and since then I have changed the following based on what I read here
a)I changed the Fuel filter and checked the fuel pump to make sure its working (and it does works fine) I switched the gas from regular to premium and put in engine cleaning fluid in there and tried to run the car for a while

b) I took apart the air intake manifold and cleaned the whole system and tried to test the throttle position sensor as well

c) I have changed the ignition switch with brand new one from honda
d) I have changed the ignition coils with brand new ones from honda
e) I have put in brand new iridium spark plugs
f) I have changed the thermostat
g) I have changed the engine coolant temperature sensor
h) I have changed the main relay (three relays under the glove compartment- 1 blue= fuel relay, 2 brown =engine relay 3 black = ??)

The problem still is not solved.

Please can anyone help me solve this problem. I desperately need help.

Thanks

lnarthur

 

hey i have the same issue as you with my 2002 honda civic ex have you find the problem and if you did can you please tell me what is it!

 

Is the "key" light on the dashboard coming on? The "immobilizer" system could be malfunctioning. The car is designed to go only slowly when it thinks you are trying to steal it.

 

finally it was the cramshaft sensor but anyways i fixed it and i sold the car about time bcuz i had 245000 miles on it lol

 

read the stuff it is quite interesting.