Hi there I have a 1st Gen b16a (PR3) in a 89 Si and I seem to have a problem where when I maintain a certain throttle load the car seems to bog/feel flat until I give the car some gas and it goes back to normal. I heard that the common problem would be the primary and secondary 02 sensor wires mixed up. I re-wired the two so that C8 and C16 are going to the proper sensors. But the problem remains. I get no codes and when I disconnect the 02 wires I get no ECU code either. Any insight would be helpful. Thanks for your advise in advance.

 

I have the exact same issue with my b16/90si. It really only seems noticable between 2500 and 4000 when trying to keep a solid rpm/mph. I havent messed with my o2 sensors, but I thought thats what the problem might be. Any ideas would certainly be appreciated.

 

bump

 

Yeah I had that same problem too half throttle it would bog on me, then i get on it and the car is fine. Never figured out the problem

 

i had the same problem. Change the cap rotor wires and plugs and see how she runs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted Chemist &raquo;</TD></TR><TR><TD CLASS="quote">i had the same problem. Change the cap rotor wires and plugs and see how she runs </TD></TR></TABLE>

 

LOL, my car does it on the turnpike when I driving real far. It will do it for like 20 miles then stop . Its been doing it for almost 5 years now since I have my b16. It drives me nuts though because it only does it once and while. *Yet another reason why I'm going obd1 to get rid of the bullshit from obd0.*

 

check your fuel filter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by goforbroke &raquo;</TD></TR><TR><TD CLASS="quote">LOL, my car does it on the turnpike when I driving real far. It will do it for like 20 miles then stop . Its been doing it for almost 5 years now since I have my b16. It drives me nuts though because it only does it once and while. *Yet another reason why I'm going obd1 to get rid of the bullshit from obd0.*</TD></TR></TABLE>

yeah also after going obd1 with crome, my car runs better even with big *** injectors, the pr3 ecu (obd0) never impressed me much

 

had the same problem with my b16...i got some hotter plugs (nissan maxima spec), ngk plug wires, fpr & guage and the problem went away. runs like new now.

 

had the same bogging problem at half trottle at like 2800-4000 rpm....but after i went obd1 it went away and it never bogged again

 

haha, thats for the replies guys.

 

swap your 02 sensors.... that was my prob years back... Does it go away when you disconnect the sensors

 

yep i have the same issues but iv changed both O2's, dizzy cap and rotor, new plugs new wires new fuel filter and still the bogging continues. It feels like the car missing.

 

O yeah and i was told that it could be the knock sensor replaced that and same crap.

 

you might want to check the wiring to the ECU.
it is worth a try.

 

if your talking to me, its driven fine for the past 11 months but it started the bogging about two or three weeks ago.

 

Mine does in to, and I was told it was from the vafc needing some more tunning. Or it could be an intake leak.

 

well i am talking to anyone with this issue.
i am just saying that an intermittent connection could possibly cause these kinds of symptoms.

 

sorry didn't mean to sound rude, but when i can get the time off work. wiring is next on my checklist.

 

WOW..SO IT IS QUITE COMMON...I WENT AND CHECKED AND C8 AND C16 WERE CROSSED. I RE-CONNECTED THE O2'S TO THE CORRECT ECU CONNECTIONS AND IT STILL DOES THE SAME THING. MAP SENSOR/VACUUM LINES WERE REPLACED. GOT 2 BRAND NEW O2 SENSORS. GOING TO CHANGE THEM TONITE. MY FINGERS ARE CROSSED. IF NOT THEN OBD1 MIGHT BE IN MY FUTURE.

 

Thanks, ****, your thread gave me some ideas because mine tends to bog down also. Except mine is mostly when I fill my gas tank don't know why.

 

yAH mine does that same stuff too, it went away and now my car is just running like crap it bogs like crazy between 2000 to 3500 rpms...i think instead of assuming what to fix i'm just gonna pay to have it diagnosed its the best way to really know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JOGADOGGZ &raquo;</TD></TR><TR><TD CLASS="quote">yAH mine does that same stuff too, it went away and now my car is just running like crap it bogs like crazy between 2000 to 3500 rpms...i think instead of assuming what to fix i'm just gonna pay to have it diagnosed its the best way to really know.</TD></TR></TABLE>

HA... good luck with that most mechanics don't know what to do or even where to start if they cant plug and OBD machine it and tell them what to fix. just make sure you take it to a shop that's familiar with engine swaps.

 

update...new 02 sensors installed idles kind of high.. but 1000-900 rpm is alright..gonna play with the idle adjust screw.. runs a lot smoother...thanks for the input guys,,,