Jdm B16a swap, wont hold steady idle...help.
 

what up h-t,
i have a 1995 honda civic ex with a jdm b16a swap. my problem is my car wont hold a steady idle, idles goes up n down n the car wants turn off but sometimes then idles up n down going to a high idle then back to normal. it doesnt idle like that all the time tho, it only does it every now n then. i have checked all the vacuum lines n those r good, also clean the idle control valve so at this point idk what it could be, any info would be great. Thanks:thumbup:

Re: Jdm B16a swap, wont hold steady idle...help.
 

bump! 37 views n nothing

Re: Jdm B16a swap, wont hold steady idle...help.
 

is the MAP and TPS switched?

Re: Jdm B16a swap, wont hold steady idle...help.
 

No, the map n tps r good, the map sensor is actually brand new. would the tps make it idle like that?

Re: Jdm B16a swap, wont hold steady idle...help.
 

I'm almost positive it would. It could be something else. But I would check the TPS. And your sure that the plugs aren't swapped for the MAP and TPS. They have the same plug and they are right next to each other. Cause it sounds like what happened with my swap, i just had them switched. As soon as I switched them back, i had a smooth idle.

Re: Jdm B16a swap, wont hold steady idle...help.
 

I will recheck n switch the plugs to see if that helps the idle n i will let u know how it goes, thanks for helping out.

Re: Jdm B16a swap, wont hold steady idle...help.
 

It could be the throttle body. Gasket mite not be good. I had the same problem.

Re: Jdm B16a swap, wont hold steady idle...help.
 

good luck.

Re: Jdm B16a swap, wont hold steady idle...help.
 

I actually just went to my car right now really quick n ur right that the switches the same so i tried switching them but the harness plug that goes into the TPS isnt long enough to reach up to the MAP so im guessing that they are plugged in right?

Re: Jdm B16a swap, wont hold steady idle...help.
 

i was thinking that too, once u replaced the throttle body gasket did that fix ur problem?

Re: Jdm B16a swap, wont hold steady idle...help.
 

on my swap, i had length either way. But, since you can't swap it, its probably in the right area. Are you throwing a CEL? If so, check the codes. But i would also suggest the TB Gasket.

Re: Jdm B16a swap, wont hold steady idle...help.
 

but it does sound like a bad TPS sensor. I see alot of these broken on swapped motors.

Re: Jdm B16a swap, wont hold steady idle...help.
 

No, no CEL. Car runs perfect no problems just idles weird every now n then but still annoying u know. Imma try to replace the throttle body gasket later today if i have time.

Re: Jdm B16a swap, wont hold steady idle...help.
 

The TPS is actually kinda loose, looks like it was gonna brake. imma try to replace it but its gonna cost a good penny.

Re: Jdm B16a swap, wont hold steady idle...help.
 

Thats the problem right there. You could find them aftermarket i believe. Its been a while since i looked for one. But I rememeber them going for like $20 online. If you go to the dealer, I can see them charging you an arm for it.

Re: Jdm B16a swap, wont hold steady idle...help.
 

i actually just checked autozone online n they only go for 45$ so i think imma go pick one up n throttle body gasket while im at it.

Re: Jdm B16a swap, wont hold steady idle...help.
 

Autozone carries TPS sensors for about $46

Re: Jdm B16a swap, wont hold steady idle...help.
 

cool. good luck man.

Re: Jdm B16a swap, wont hold steady idle...help.
 

Thanks, appreciate the help! :thumbup:

Re: Jdm B16a swap, wont hold steady idle...help.
 

TPS is $15-25 on ebay. Just get one if it looks like its partially broken.

Re: Jdm B16a swap, wont hold steady idle...help.
 

yeah i am, i plan to get one asap.

Re: Jdm B16a swap, wont hold steady idle...help.
 

Just bought my new TPS Sensor on ebay, only $18.40 so it wasnt bad whatsoever, should be getting it by friday or so, Hopefully that fixes my problem.

Re: Jdm B16a swap, wont hold steady idle...help.
 

Wow you got great timing, Im having the same issue. I did all the same things you did, but I went ahead and replaced the coil. But still acting up, and your right its annoying. Well G/L and keep us informed.

Re: Jdm B16a swap, wont hold steady idle...help.
 

what n what have u replced so far on yours? n i'll let u know if mine gets fixed with the new TPS just gotta wait for it to come in the mail.

Re: Jdm B16a swap, wont hold steady idle...help.
 

well I cleaned the IACV, and throttle body, PCV. Replaced the coil and roter, but kept the cap and wires. I cleaned and regaped the plugs back to .044. and put in a larger fuel pump. and checked all the wires to be in the proper place.

All this did clear up the a few small issue but still the idle will drop down from 800rpm to 300 then back up to 800 and hold.