New muffler = CEL?

[90Haccord]

So, my muffler fell off of my car last week.

Drove it for 150 miles without a muffler, no major problems other then loud as hell and lower gas mileage.

Got a new muffler put on Friday, drove it around town on Saturday running errands. NO PROBLEMS.

Took I took it on a day trip driving about 2 hours each way, car acted fine UNTIL I set the cruise control at 55, it hesistated and threw a "soft" CEL. CEL wasn't there anymore when I turned the car off, it did it twice while on the highway, no real problems noticed. If anything it ran BETTER, and my gas mileage went from 24-25mpg to 31mpg after new muffler. Will the cb7 throw a code if its running TOO LEAN? Another idea I had..


IDEAS? I'm stumped, maybe O2 sensor? 02 is at least 8 years old..

[JoshM]

Have you checked the code(s)?

[90Haccord]

No codes listed, yes I've attempted to pull the codes.

It is def. throwing a code while on the highway cruising at a steady 55mph though....comes and goes. Weird.

[JoshM]

If it comes on, it should be stored in the ECU's "memory".

[90Haccord]

Hrmmmmmmmmmmmm

[cloudasc]

When it throws a cel, keep the car on and jump the connector when you get a chance to pull over, that way it won't forget, had that happen to me also.

[deevergote]

There's nothing that the muffler affects that should throw a CEL... or change gas mileage...


If the CEL comes on at 55mph (seems to be where it always happens), chances are you're going to get a code 43 - Fuel Supply System. As strange as it seems, it's very unlikely to be anything with the fuel system...


Replace your oxygen sensor, and your problem will be solved. Cough up the cash for an OEM Honda sensor if you don't want to do any soldering to make one of the cheaper Bosch sensors available at parts stores work properly.

[bcjammerx]

egr...maybe o2?

[TypeG]

get the code and come back. later.

[ash]

sorry that im a little off topic

but i live in australia, and from my calculations that is VERY GOOD milage

i drive in mainly city type conditions, and i get around 480 km's on a full tank (300 miles)

can some1 work out how many mpg that is??

[deevergote]

300 miles is about 20mpg. Not very good. I average about 28 with my H22 and tuned ECU.

[90Haccord]

Guess I'll wait for it to come back on...


Whats the best deal on a OEM o2 sensor? Got the EX, so I guess that means its on the downpipe..

[JoshM]

300 miles is about 20mpg. Not very good.

x2. Unless you have a smaller tank, which I doubt.
I'm getting 30+mpg (rarely hwy driving) and my car is running extremely rich.

[CB7lx91]

There's nothing that the muffler affects that should throw a CEL... or change gas mileage...


If the CEL comes on at 55mph (seems to be where it always happens), chances are you're going to get a code 43 - Fuel Supply System. As strange as it seems, it's very unlikely to be anything with the fuel system...


Replace your oxygen sensor, and your problem will be solved. Cough up the cash for an OEM Honda sensor if you don't want to do any soldering to make one of the cheaper Bosch sensors available at parts stores work properly.

Sorry in advance for the thread jack/off topic-ness, but what part of the sensor do you solder up for the Bosch o2? I am just curious, I have never heard of this before.

[Flatline]

sorry that im a little off topic

but i live in australia, and from my calculations that is VERY GOOD milage

i drive in mainly city type conditions, and i get around 480 km's on a full tank (300 miles)

can some1 work out how many mpg that is??

are you sure your filling up all the way? i had the same problem. but i was only putting enough for my meter to read at F which apparently was 4 gallons (or something like that) too short. maybe my shit is all F'ed up but that was my problem.