Ok so it seems a problem always comes up with this build im doing..i just fixed my idle problem. NOW this..ok so i got my piece from Honda today installed it and took the car out for a drive with my buddy..i took off in first gear i was in first and when i went to let the clutch out from being in first gear when i hit the Gas the car would buck like crazy when i hit the gas when i would take my foot off the gas or take it out of gear it would be fine...ALSO when im driving i can be in gear and sometimes when i would hit the gas (usually in 1st or 2nd) the car would jump and buck forward??? i had this same problem with my old motor and tranny.

Im also throwing a CEL BUT it might be because i dont have a Catalytic converter and O2 sensor plugged up..i have a resonated Test pipe. What could be the problem guys? it runs fine other than this..

 

Fix the obvious issues first, like not having an O2 sensor & cat, then report back.

 

So i now have to take my resonated test pipe off and go get a catalytic converter and O2 sensor and install those?..jeez...u think thats the problem? or just install a O2 Sensor?

 

I dont think its a Test pipe/O2 sensor problem..i have seen guys run fine without those things..ALSO when i have the car sitting still and lightly touch the gas pedal the RPM's jump up and down when i give it a LIL bit of gas but if i give it more gas it smoothens out.

 

how do your plugs look?

 

umm idk..i got the swap with 170K on it..i was planning on replacing them soon with some NGK V-powers. like the previous posts..when i take off and am in first then once i hit the gas in first gear the car will buck..i shift into second it will sometimes buck when giving it gas.

 

My car bucked really bad. I had checked everything and it was all fine. I looked at the plugs...it was past time for a change. Put in the new ones and problem solved.

 

Ok i will do that..cuz i had the same problem with my D15B8 that i originally had in there and that motor had 230K on it and had bucking too..so i will replace the spark plugs ASAP! I hope this works! thanks for the info. its tiring constantly having all these setbacks when you just finished a swap.

 

Any other suggestions?

 

Out of curiosity, why would you not use an o2 sensor?

 

Because i pieced the swap together..and couldnt find a 4 wire O2 sensor for a good price..i knew cars could run without a O2 sensor and Catalytic Converter.. so thats the only reason i did that..

 

i'm actually having the exact problem as you are, and i it only happened after i fixed my idle by replacing the FITV. i speculate that it could be the throttle position sensor, but i'm not 100% positive. the car is at my mechanic now, hopefully its a cheap/quick fix.

let us know if you remedy the problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bdubnyc &raquo;</TD></TR><TR><TD CLASS="quote">Because i pieced the swap together..and couldnt find a 4 wire O2 sensor for a good price..i knew cars could run without a O2 sensor and Catalytic Converter.. so thats the only reason i did that..</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bdubnyc &raquo;</TD></TR><TR><TD CLASS="quote">Because i pieced the swap together..and couldnt find a 4 wire O2 sensor for a good price..i knew cars could run without a O2 sensor and Catalytic Converter.. so thats the only reason i did that..</TD></TR></TABLE>

Yes a car will run with out an O2 sensor but it will run really rich and use a ton more gas period. As far as the cat goes the 92-95 O2 is pre cat so it doesn't change the way the car runs just how much crap comes out the tail pipe. You might want to check all the engine mounts really check the lower trans mount and lower drivers mount for cracks. If these fail the motor will swing and cause the car to buck esp under high rpm shifts

 

wow you think the problem could be engine mounts? well i dont have a Lower Driver Side Engine mount (its the mount that connects the lower bottom of the block with a bracket to the lower driver side frame right?).....and i had the same problem with bucking and such with my old motor and that lower driver side mount that i had on there with the old motor had cracks in it..so i took the entire thing off..could not having this mout REALLY cause the car to buck?

 

UP one more time. anyone else have a solution? Could me not having a O2 Sensor and Resonated Test Pipe cause the bucking at low RPM in 1st and 2nd Gear?


Modified by bdubnyc at 6:53 AM 3/28/2008

 

I would install the o2 sensor just so your car knows how much fuel its getting... The computer is telling it to run at a set tune when you dont have the o2 and your car could acctually be running lean wich might caz this... and did you change the spark plugs? mabe even a full tune up is needed. And if that dosent work check the TPS sensor.

 

I was told by Tony(Sh!tsweak on HT) on my local forum here in NC (Importsnc.com) that he had the exact same problem as i do with his hatch..turns out he needed a new Fuel Filter..the element inside his filter was really dirty and clogged up and caused his hatch to buck at low RPM's and sputter when revving in Neutral at low RPM's same symptoms as my hatch.

So i will be getting new Spark Plugs,Fuel Filter,and O2 Sensor..i will let you guys knw if this fixes the problem in the coming weeks when i get paid!

 

well, i just got word from my mechanic that he has yet to find the cause of the problem as well.

he said he checked for vacume leaks and there were none, he checked the MAP and TPS sensors, and said they were fine, and even checked the timing on the motor, which was fine as well.

hmm... this is strange, why would the fuel filter all of a sudden go bad from fixing the idle on the car. i dont know, but i'll pass the word along to my mechanic about the possible dirty fuel filter.




Modified by da1lydr1ver at 10:29 AM 3/29/2008

 

the mount you're referring to is called a torque mount, i believe you have them on both sides of your bay. you're lacking multiple things that cause a bucking car. stop wasting your money on a mechanic, and buy a new o2 sensor and mount, these are important things anyway and are there for a vital reason. when you find/install those parts, and the problem persists, then you can go on troubleshooting.

good luck

 

i installed the new fuel filter and it didnt buck and such...for a while...it did it but it wasnt as BAD AND ROUGH and didnt do it EVERYTIME i hit the gas as it use to be i could atleast cruise in second with my foot on the gas and it would not buck...but after a while it would SLIGHTLY jerk and buck forward...but it wasnt as HARSH as it use to be so idk..i plan on getting new spark plugs and what not also.

 

then it sounds like a fuel related issue not a fitv

 

Hmm so im guessing it could be my Fuel Pump?? or a slightly clogged or loose Fuel Injector? im going to get some Fuel Injector cleaner..? any other ideas?

Also noticed that when the car is warmed up after idling high low high low for about 5 mins and when it calms down and gets to regular idle speed..i can slightly press the gas and the car will rev up and down up and down like its bouncing from about regular idle to high idle really fast when im sitting in neutral and slightly pressing the gas? what could that be? clean my IACV?

 

well, the previous owner installed a 255lph fuel pump on my car and my mechanic said he's going to change the pump back to stock (the 255 fuel pump is too big for my stock motor). i'll let you know if that changes anything.

 

^ok cool....thnx

now since mine doesnt do it that much anymore since i installed my new fuel filter it does do it randomly now tho but not as harsh and not like before when i would hit the gas everytime i can atleast hit the gas now without it bucking BUT it still bucks from time to time on random occasions but not ALL the time like before..Hmm so im guessing it could be my Fuel Pump?? or a slightly clogged or loose Fuel Injector? im going to get some Fuel Injector cleaner..? any other ideas?