Checked the plugs, cap, rotor, wires, i got new o2 sensors, new fuel filter. It didnt start doing this until recently. i even switched back to the original cap and rotor and wires and it still misses at low speed accel. it seems to run fine in top end though...can someone help me please..i dont know what else to check. also i dont think my check engine light works or the whole obd2 system is stupid because i can pull a spark plug wire off and the CEL light doesnt come on...how odd.

*update* if i floor it in any gear it misses the whole entire power band pretty much especially 2nd, 3rd, 4th

 

injectors?... fuel pump? my first guess is the injectors

oh yea also... did u replace your plugs or wires, just cuz you checked them doesnt mean they are good




Modified by meagainsttheworld at 8:42 AM 7/30/2006

 

yeah i replaced the spark plugs twice...3 different sets...same problem. so that rules those out. i had removed the secondary o2 sensor for a short time because the way the o2 bung is placed on my cat makes the sensor face towards the ground....removed it and no check engine light came on(i dont think my obd2 system is working right) and then it drove fine for a day or so like that...then it started missing a little bit..not as much as its doing now....SO then i put the sensor back in and its acting worse...


i think the fuel issue can be ruled out because it drives normal except for when i get on it...

 

ill try resetting the ecu and see whaty that does

 

Sounds simple but try re-checking your spark plug wires on the dizzy. I had a huge misfire, rough idle and ended up having #2 and #3 wires switched around.

Something to check.

 

i go-t the order right...i messed around with the order too...it DOES seem like a spark issue

 

It's your ignition coil. It's about $85 from Advance Auto and it's a super common issue with our cars.

I'm assuming the symptoms go something like this:

When I go from a dead start the car has a rapid-studder until it hits 2500-3500ish RPM and then the car is normal. If when I shift the RPM falls below that threshold, it'll studder again until it's eclipsed. In the high RPM it drives normally. It's just below 2500-3500 RPM that the issue is happening.

 

yep....thgat sounds exactly like it

 

well i bought a coil and put it on....still does it.... :-/

 

do i have to reset the ecu or something again whenever i do this? im so lost with this issue

 

have u checked out ur injectors?

 

well all my other tools are at work...it just doesnt seem like a fuel thing to me...but no i havent checked them....i took out an o2 sensor, then put it back in and it started doing this....how all of a sudden the injectors would be affected?

 

anyone???

 

the car only does this during WOT/half-3/4 throttle in any gear..i ohm checked the wires....checked the map sensor voltage...checked IAT voltage(i had a code for some reason) i checked the coil(replaced the coil) i ohms checked the injectors..all read the same....all my problems started whenever i removed the secondary o2 sensor...left it out for a day or so...and then put it back in whenever it started messing up...and now it still is messing up. CAR RAN FINE BEFORE I DID THIS...

 

i got this weird thing that started recently after o2 sensor heater wire got disconnected. i replaced tha o2 sensor altogether and it still does it. but what happens is, at WOT and in VTEC, tha car has a bad detonatin' (or misfirin') sound. tha car barely wants to move forward. i have an aftermarket exhaust so when this happens, all you hear is a lot of poppin' sound. that hodlin' back feelin' almost feels like i'm drivin' with tha e-brakes up. i don't think i'm in any sort of limp-mode as there are no CEL codes.

what to look for?

_taF

 

yeah thats basiclly what my car is doing as well...the only thing i did was remove that secondary sensor and then it ran fine for a day or so...then all of a sudden it started doing what you described....throttle at WOT it pops and misfires....im so lost...everything seems to check out fine..i dont know where else to check

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95vtecsrus &raquo;</TD></TR><TR><TD CLASS="quote">yeah thats basiclly what my car is doing as well...the only thing i did was remove that secondary sensor and then it ran fine for a day or so...then all of a sudden it started doing what you described....throttle at WOT it pops and misfires....im so lost...everything seems to check out fine..i dont know where else to check</TD></TR></TABLE>

I'ma go out on a limb here and assume u put the secondary O2 sensor back in..?

 

yessir i did....the car is back exactly how it was when it was running fine...even then the haynes book said that sensor has nothing to do with A/F mixture...so...yeah

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95vtecsrus &raquo;</TD></TR><TR><TD CLASS="quote">yeah thats basiclly what my car is doing as well...the only thing i did was remove that secondary sensor and then it ran fine for a day or so...then all of a sudden it started doing what you described....throttle at WOT it pops and misfires....im so lost...everything seems to check out fine..i dont know where else to check</TD></TR></TABLE>
holy shiet! i checked a few things out on my engine after i washed it. checked dip stick. i was really low on oil. tha very tip of it barely touched any oil. i have no clue how i suddenly lost all that oil after recently doin' an oil change. no spots on tha cardborad beneath my car either or on tha chassis' undercarriage. no black smoke either. i also checked tha timing belt. my timing was retarded down to 12 when it should have been at 16. it's really odd how all this happened just suddenly. i'll follow-up to this. i was also told by a referee that he recommended NGK plugs over my Denso's since i was runnin' high on CO2 when i went to get BAR'd. well, at least i know my new cat' and new Denso o2 sensor worked out well. my NOx was really low. i'll follow-up to my ignition problem.

_taF

 

check ur injectors. my integra did the same thing. swapped a new fuel rail with new injectors and the problem went away.

 

chech your enjectors and if you arnt using ngk plug put some in thats what come from the factory

 

did you just get oe sized injectors???? did you get a AEM rail or something?

 

ok, i checked tha gap on my plugs, and they're too spec'. i set timing from 12* to 15*/16*. tha problem is still there. however, it does run noticeably better, but it still pops and still has a little drag (holding back feeling) to it. there's a lot of loose sounds (sort of rattle/clanking) comin' from tha block.

i'm really goin' to have to pull tha head off to inspec tha pistons & rods. i need to do this anyway. i have oil comin' out of where my head gasket is. ughh...

_taF

 

WELL I TOOK MY CAR TO A LOCAL IMPORT PLACE...AND THEY SAID IT WAS MY DIZZY CAUSING ALL THE PROBS....I GUESS I GOT SOME FUDGED UP WIRING IN THERE...FIRST IM GOING TO TRY TO REPAIR THE WIRES AND IF TH AT DOESNT WORK THEN IM GOING TO BUY A MSD PRO-BILLET....BEFORE ANYONE HAS NEGATIVE RESPONSES TO THAT....DOESNT THAT ONE COST LESS THAN A HONDA OE ONE?

 

have you ever messed with tha wirin' in tha first place, or by anybody else?

_taF