[DannyK35]

Alright, got a shop here in Chicago to do the magnaflow cat for $210 out the door on Friday. One less variable to deal with. Thanks again guys.

[2002civicLX2002]

a plugged cat WILL cause the engine to miss. im betting thats your only problem, even though there is only one code for it.

[greeen01civic4d]

keep us updated man

[DannyK35]

VICTORY.

(well, at least for now)

Just got the car back from the shop. Turns out that I also needed to get a new valve cover gasket to replace the old one, it was slowly leaking oil.

I got it back about 1.5 hours ago and god damn the difference was noticeable immediately! Not that these cars are fast/quick but holy shit it was like I was driving a completely different car than I have been for the past few months!

Here is what I had replaced today:

- timing belt/tensioner (OEM)
- water pump (OEM)
- magnaflow catalytic converter
- valve cover gasket

Total cost w/labor and tax: $630. Found a Honda tech online that does side work on his days off, that's a pretty solid deal.

So I'm pretty stoked and not freaking the fuck out about this 2000 mile trip I am taking on Sunday, I just wish I figured that out earlier. And I'll throw the FP60 from lubecontrol.com when it comes tomorrow just for the hell of it.


I want to thank everyone here on 7thGen (I mean civicforums.com) for their input and suggestions, you have no idea how appreciative I am.


Thanks Everyone, and I will update this thread if anything pops up (hopefully it won't).

[2002civicLX2002]

I had a suspicion is was a plugged cat since it was missing on all 4 cylinders. thanks for the update and good luck and safe trip.

[greeen01civic4d]

congrats man

[DannyK35]

Well, I spoke too soon.

I have been driving it on the highway to test everything out and low and behold, CEL comes on while I'm doing 40 down the street. Ran it over to autozone, only code that popped up (2 times, mind you):

P0420 Catalyst System Efficiency Below Threshold (Bank 1)

So, I'm going to have to guess that it's a faulty oxygen sensor for now. All of the other variables that could cause this are not there (no vacuum leaks, brand new cat, etc).

However, I can tell that my mpg is back up to normal b/c I've got a little over a half tank left and I've put on 180mi from a full tank.

Any suggestions or is it even worth bothering to replace it right now? Leaving tomorrow for Seattle.

[gearbox]

prolly replace secondary o2 sensor. it wont affect how the car dirves tho. just do it to turn the engine light off.

[DannyK35]

well, just a post script:

Made it to Seattle in less than 2 days, never got the o2 sensor fixed.

However, damn what a difference after the repairs. I averaged 35-38mpg the entire way (best tank was actually 42mpg), doing 85mph and driving through the mountains. Pretty damn good.

[gearbox]

nice glad you made it okay

[greeen01civic4d]

u comin back to chicago?? i was in linkoln park the past weekend..

[utahbmxer]

Not to Jack a thread. I've been having the same P0300 (random), P0301, P0302, P0303, P0304 misfires as well for the past few weeks. I also had the P1298 (High Voltage in ELD) but I fixed that by replacing the ELD. I can't seem to figure out why I am having all these random misfires. I replaced my plugs, did a fuel pressure test (came out @45psi). I ran Seafoam through tank and throttle body, tried Premium gas this tank. I did pop one P0420 (CAT below thresh) code a few days ago, but it hasn't returned. I am thinking there is some electrical issue, possibly bad ECM. Anyone have any thoughts? I don't want to drop money on a new ECM and have that not be the problem, and I can't find any at the wrecking yards.

-The car shakes bad under say 1,300 RPMs, especially when cold. I can feel and hear it misfire. CEL flashes at this time.
-Doesn't seem to misfire over 1500RPM
-When I drive on the freeway and come to a stop the engine almost dies at like 400 RPMs or below, then slowly creeps back to ~700
-On another note, Car has done a weird idle down when I let off the gas, since I got the car with 62k mi. See video:

YouTube Video

2001 LX Sedan
5spd
AEM Short CAI
DCSports TCS Exhaust
149,000mi

Thanks,
utahbmxer

[gearbox]

whoa the idle is screwed up bad. try cleaning the whole intake system, throttle body, iac valve, everything. put it all back and relearn the idle. i also think the cat might be going bad (clogged) or maybe the 02 sensor for it also.

[WannaBFast]

the flashing CEL is VERY bad, it basically means you got a misfire that is probablly damaging your cat.. if it already isnt already

might have a clogged cat, or a sensor that is broken

[Krieger]

Originally Posted by gearbox

whoa the idle is screwed up bad. try cleaning the whole intake system, throttle body, iac valve, everything. put it all back and relearn the idle. i also think the cat might be going bad (clogged) or maybe the 02 sensor for it also.

x2.

thats crazy.