I was wondering if my 93 civic dx with the zc motor has an egr valve and if so where it would be located. Still trying to figure out why I'm getting terrible gas mileage and when the car warms up to running temp it runs terrible and Boggs out bad when accelerating. Thanks for the help guys.
Alright. I finally got a chance to Jump the two ports yesterday and got a code for a o2 sensor heater. So I replaced the o2 sensor. It's a little bit better but still Boggs out most of the time wen accelerating. I've noticed if I kid of ease into the gas then it doesn't usually bogg out but if I step on it normal or hard then It does. I also gutted the cat and changed coil pack dizzy cap plugs and wires and replaced fuel pump and fuel filter and ect sensor all about 3 months ago.
So check for power to the O2 sensor, power for the O2 sensor is supplied by the fuel injector relay in the PGM-FI Main Relay, the PGM-FI Main Relay is working, [or engine would not run] but the injector relays output is split after the PGM-FI Main Relay to a number of places, on of them is them O2 sensor, make sure there is 12V+ at the sensor when the ign. switch is on. 94
RIP Zack 2001-2013, my best friend.
Ok that makes sense. I replaced the o2 sensor last night because of the cel code. The car is running a tiny but better. Still runs like **** the once it warms up an Boggs out when accelerating. I will check to make sure tho that the o2 sensor is getting good voltage to it. If not then I will prolly have to re wire it I'm guessing. Thanks for the info. Might be a few days until I can get a voltage meter. I'll update ya.
The relay will be good, if it was not the injectors would not have power and the fuel pump would not run, a bad PGM-FI Main Relay = engine will not run.
If there is no or low voltage at the O2 sensor, there is a connection problem between thew PGM-FI Main Relay and the O2 sensor, if the voltage is good, the O2 sensor is bad. 94
Ok I just tested the voltage to the o2 sensor and that was 12 volts so we are good there. Car seems to be running better after putting in new o2 sensor. Still runs a lot better when it's cold though and starts to kind of miss and bogg out sometimes when I accelerate when it's at operating temp.
Alright I'll check that then. I thought for sure a new ect sensor would fix it. That was the only thing that actually made sense to me on why te car ran good cold and bad warm. Idk tho I'll check the wiring them from the ecu to the ect sensor
Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way.
Copyright/trademark/sales mark infringements are not intended or implied.