bmxerjdc

hey, i gotta '99 Civic Si b16A2. When i'm driving and i give it anymore gas than a light acceleration it hesitates for about 1sec or so and then it will accelerate normal, and sometimes it will bog if im driving at around 3000rpm's and then floor it in any gear. it will do this in every gear, no matter what the rpm is. it will do it in neutral too. when i am driving and pressing the gas pedal about 25% and then floor it, it wont bogg or hesitate. ive changed the plugs, wires, fuel filter, throttle position sensor, and dizzy cap and running 93 octane.. and ive cleaned out the throttle body, and it hasnt gotten any better yet. could it be my ECU, MAP or my O2 sensor?..... Whats wrong?




Modified by bmxerjdc at 9:00 AM 5/23/2006

Si_chRis

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bmxerjdc &raquo;</TD></TR><TR><TD CLASS="quote">hey, i gotta '99 Civic Si. When i'm driving and i give it anymore gas than a light acceleration it hesitates for about 1sec or so and then it will accelerate normal. it will do this in every gear, no matter what the rpm is. it will do it in neutral too. when i am driving and pressing the gas pedal about 25% and then floor it, it wont do it. there is no CEL and it seems to be getting worse. ive changed the plugs, wires, fuel filter, throttle position sensor, and dizzy cap and running 93 octane.. and ive cleaned out the throttle body, and it hasnt gotten any better yet. could it be my ECU?..... Whats wrong? </TD></TR></TABLE>

mayb it could be your timing??

bmxerjdc

and how would i fix my timing?

snatch

Check your timing with a timing light and see if it's within spec.

boosted civic 2k6

i would've thought it to be the TPS. sounds also like a timing issue or incorrect fuel mixture. checked the injectors?

my guess is when u give a sudden pop accel like that, its running lean for a sec and it could be that the ECU hasn't compensated in time.

bmxerjdc

well i ran it on a computer to see if it was running any codes without the CEL on, and it is showing catalyst not running good enough or something like that... but no CEL

boosted civic 2k6

clogged cat maybe?

Jorsher

Yeah I have the same problem, have tried the same things and more, does your ever seem to stutter while accelerating through 2000-3500? How can I test things that aren't throwing a cel? Maybe my cat is clogged too...

bmxerjdc

it does it at any rpm, not just around that, could it be the Cat?

HondaEJ7

my accord has the same problem. it could be TPS or something with the air system. gotta look into it, cuz its slow as fawk

bmxerjdc

well, ive already changed the TPS and it still runs the exact same... so i dont think it would be that.

'00DC2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jorsher &raquo;</TD></TR><TR><TD CLASS="quote">Yeah I have the same problem, have tried the same things and more, does your ever seem to stutter while accelerating through 2000-3500? How can I test things that aren't throwing a cel? Maybe my cat is clogged too...</TD></TR></TABLE>

bump, I have the same problem

HondaEJ7

try an ECU flush or reset maybe??

Jorsher

I have the same problem, I've also tried another tps to no avail, and the ecu has been reset at least twice already, still have the problem.

bmxerjdc

ya, ive reset my ecu at least twice too and there has been no difference at all.

Duch

happened in my car as well.. I took the map sensor out, cleaned it out, and put it in snugly, and it had fixed the problem. driven for 100kms or 600 mi and not problems so far

hatchedeg

try switching the ect sensor connector and the iac sensor connector. (they're the same connector)

sicones

replace the primary 02 sensor, use Denso

bmxerjdc

ive already cleaned out the map sensor when i cleaned out the throttle body.. and where are those other 2 sensor connectors located?

92_VX_EG

My buddies DA was doing the same thing. We put new wires, plugs, cat, tps, and tried another ECU and it didn't help. I put another distributor in it and it cleared right up. Just a thought. Just have someone let you try their distributor that you know works.

hatchedeg

the connector for the iac is behind the intake manifold. (once u find that one look for the same kind of connector n switch'em)

Jorsher

Yeah I was going to try one friends dizzy because it's also a d16y8, but it has extra wires, I guess because it's a 99 and I think has obd2b instead of obd2a.

Tried another supposedly good dizzy, which started out running ok but as soon as I hit about 4k rpm the tach went nuts and then the car was idling at like 500rpm somehow.

bmxerjdc

on my MAP sensor, i got one of those adapters that raise it up higher off the throttle body, i was told that was for a turbo. im gonna take it off today and see if that changes anything, and i also heard that it could be my 02 sensor so im gonna take it off and clean it out today and see if it does anything. when i reset my ECU, the CEL came back on reading code 20 or 420 or something like that... i dont really remember. but it has something to do with catalyst or something...

bmxerjdc

I cleaned my o2 sensor earlier today, and it didnt change anything. I rewired the second o2 sensor and it turned the CEL off, so i think i fixed that. but my car is still hesitating/bogging like crazy. nothing ive tried has even helped it at all!!

bmxerjdc

has anyone had this same problem and fixed it? because i need help, and i dont wanna take it to a dealer and pay a crapload of money for some cheap part i can replace myself.