2001 Accord sluggish
Hi folks,
I've got a 2001 Accord EX 4 cylinder, manual trans. 160,000 km on it. For maybe the past year it's had a hesitation and sluggish feel at times. I've replaced the plugs, wires, cap and rotor, and used a few bottles of STP injector cleaner, as well as having had Terraclean done on it. After having done all of those things, it seems a fair bit more responsive, but there are still times when it will just bog, or miss for a second, when I step into the throttle. Usually mostly in the lower revs ( < 2500) In the process of tuning up / trying to improve the situation, I bought a Denso O2 sensor from eBay last spring. It's not *the* factory part, but I suspect it's a universal that was adapted to connect to the factory harness. The day I installed it, I went for an afternoon drive, and fairly quickly noticed much improved response from the car. At all revs, whenever I stepped into the throttle even slightly, it responded instantly and eagerly. After a couple of days though, it started to occasionally feel sluggish again, and finally seemed to be more or less back to the way it was. Since then I have been through the injector cleanings and new plugs, and it does feel a little better, but defintely not like it did that day. I've been on a couple of trips back and forth between Montreal and Halifax (about 12 hrs) in the last few months, and both times, toward the end of the day, I've noticed that it was much more responsive, with the same eager response when I lean into the throttle. I saved some logs from my Autotap OBD2 scanner which I can provide if it might help.. I specifically looked at the O2 sensor voltages, which from what I understand, seem to be more or less correct. It's cycling from almost 0v to .9v about once a second at idle, and faster at 2000 rpm, although occasionally it does hang at the high end of the scale, and after coming down to idle from higher revs, it hangs at near 0v for five or ten seconds. My long term fuel trim is around -10%, short term is varying around the same value. Anyone have any suggestions what to try next? The car is by no means running terribly, but I feel like it should be a little sharper than it is. Thanks in advance. |
Re: 2001 Accord sluggish
Manual trans EX? Rare as hens teeth down here in the lower 48.
If it were an auto, I'd suspect the tranny and suggest changing the fluids, but with a manual ... when my various Hondas have bogged as you describe, that's what I did, and it worked, but they were all auto. I'd *thought* it the computer, but I don't know what the 2001 has for a computer - maybe your different O2 sensor causes the computer to re-train? J. On Thu, 26 Nov 2009 14:33:36 -0400, John Mason <ah210@chebucto.ns.ca> wrote: >Hi folks, > > I've got a 2001 Accord EX 4 cylinder, manual trans. 160,000 km on it. >For maybe the past year it's had a hesitation and sluggish feel at times. >I've replaced the plugs, wires, cap and rotor, and used a few bottles of >STP injector cleaner, as well as having had Terraclean done on it. After >having done all of those things, it seems a fair bit more responsive, but >there are still times when it will just bog, or miss for a second, when I >step into the throttle. Usually mostly in the lower revs ( < 2500) > >In the process of tuning up / trying to improve the situation, I bought a >Denso O2 sensor from eBay last spring. It's not *the* factory part, but I >suspect it's a universal that was adapted to connect to the factory >harness. The day I installed it, I went for an afternoon drive, and >fairly quickly noticed much improved response from the car. At all revs, >whenever I stepped into the throttle even slightly, it responded instantly >and eagerly. After a couple of days though, it started to occasionally >feel sluggish again, and finally seemed to be more or less back to the way >it was. > >Since then I have been through the injector cleanings and new plugs, and >it does feel a little better, but defintely not like it did that day. > >I've been on a couple of trips back and forth between Montreal and Halifax >(about 12 hrs) in the last few months, and both times, toward the end of >the day, I've noticed that it was much more responsive, with the same >eager response when I lean into the throttle. > >I saved some logs from my Autotap OBD2 scanner which I can provide if it >might help.. I specifically looked at the O2 sensor voltages, which from >what I understand, seem to be more or less correct. It's cycling from >almost 0v to .9v about once a second at idle, and faster at 2000 rpm, >although occasionally it does hang at the high end of the scale, and after >coming down to idle from higher revs, it hangs at near 0v for five or ten >seconds. > >My long term fuel trim is around -10%, short term is varying around the >same value. > >Anyone have any suggestions what to try next? The car is by no means >running terribly, but I feel like it should be a little sharper than it >is. > >Thanks in advance. |
Re: 2001 Accord sluggish
On Fri, 27 Nov 2009 19:15:56 -0800, JRStern <JRStern@foobar.invalid>
wrote: >Manual trans EX? Rare as hens teeth down here in the lower 48. > >If it were an auto, I'd suspect the tranny and suggest changing the >fluids, but with a manual ... when my various Hondas have bogged as >you describe, that's what I did, and it worked, but they were all >auto. I'd *thought* it the computer, but I don't know what the 2001 >has for a computer - maybe your different O2 sensor causes the >computer to re-train? meant to say, I'd though for a long time it was the computer so did nothing, thinking it an intentional attempt to save gas by avoiding sharp acceleration. then it turned out NOT to be that at all. J. |
Re: 2001 Accord sluggish
On Nov 27, 10:15 pm, JRStern <JRSt...@foobar.invalid> wrote:
> Manual trans EX? Rare as hens teeth down here in the lower 48. Lots of the EX coupes around up here, can't speak as to whether they're mostly manuals though.. In any case I'm glad to have the manual :) > If it were an auto, I'd suspect the tranny and suggest changing the > fluids, but with a manual ... when my various Hondas have bogged as > you describe, that's what I did, and it worked, but they were all > auto. I'd *thought* it the computer, but I don't know what the 2001 > has for a computer - maybe your different O2 sensor causes the > computer to re-train? Well, that's what I thought -- maybe before I swapped the sensors, the long term trim was fairly far one side or the other, and then when it started using that value based on the feedback from the new sensor the resulting mixture was more lean or rich than normal until it balanced out... which could mean that there is something else causing it to be running too lean or rich... I wish I'd thought to pull the data on the old sensor before I replaced it, to see where the long term trim was then... |
All times are GMT -4. The time now is 03:36 PM. |
© 2024 MH Sub I, LLC dba Internet Brands