B16 Idle Concern

[abguy]

I have an 91 hatch with a b16,
When started it idles fine, but slightly ruff. Once it warms up, it quite often has trouble idling. The idle drops and ramps up eraticly. With the car just about stalling.
I am thinking perhaps the tps sensor?
I have just bought this car from a friend, it has been doing it for sometime. I am mechanically inclined. But have a lot of learning to do on the vtec/honda systems.
Thank You
Owen

[Rsxstacy]

More then likely you are correct with the tps sensor but you may want to check the spark plugs if they have not been changed in a while if they are slightly misfiring they will cause an erratic idle as well..

[Ben]

Check the TPS, Idle stabilizer valve, o2 seonsor

[b16Ateg]

okay i'm stupid here wht does tps stand for.. but my b16a does the same shit like it goes to 1300 and then goes to 900 and then keeps moving... iheard alot of b16a engine swaps have that problem its very common....let me know what happens i would like to fix the problem to...

[tegdream]

throttle position sensor :thumbsup:

[hi-tec]

you should cheak ur map sensor or throttle position sensor . after that the ignition, distrubuter , sparkplug wires, plugs and finlly if nun of that is brock you probilly need a new computer..

best of luck..

[Daddymax]

TPS= throtle position sensor.

[eur0]

ot but have u run the 1/4 in ur car? i started a thread about that the other day, cause i would like to do that swap into my ride heh

[Ben]

I was racing a guy with a B16 swap into a civic like yours and we were both runnin 15.9's

Car is deffinatly faster than that, the swap should be mid to low 15's but the weather conditions were less than ideal. I mean come on, an RSX-S running 16.1's?

[abguy]

At mission race way my car ran 14.8 last summer. With just intake/header/exhaust
But then the elevation is a lot lower. It has also ate rsx-s

[egmike]

Don't forget to check the IACV Idle air control Valve, my d16 was surging and I cleaned the screen of manifold scum.... seems to have done the trick

[T5_X]

where are the TPS, MAP sensor and IACV on it and how do you recognize if any are failed/fix? My friend has a B16 civic with exactly the same problem.

[T5_X]

Anyone? I'm gonna take a look at my friend's civic soon.

[ls/vtec-crx]

was the car originally a DX or an Si?

[T5_X]

si

[abguy]

Any more ideas guys? I have noticed that the more I drive the car. the less i seem to have this problem...
Owen,

[b16Ateg]

see if you lived in calgary i would tell you to go see pat at speedtech.. but you live way up there... he had the same problem with his crv vtec in his civic hach ... he said he it would cost me like 2 hours of work like 150 to fix the problem... cos he would have to trouble shout it so ya... couldn't help you out on that one unless youlived in calgary..

[Dr. Lightspeed]

Did you do anything like try to adjust the idle when you first put the engine in.

[abguy]

I bought the car with engine already in place, but i know the guy who installed it was a mechanic. So I would imagine he did...
I'm actually starting to think, it does it more when warm than when cold...
When I have it at work to put the suspension in, I will check the vacumm lines, aswell as tps.

[legendboy]

Buy a Haynes

[b16Ateg]

i am getting my fixed in a few days when i find out what it is i will tell you cos i think your syumptoms are the same as mine.... i will let you know

[eur0]

did u check the ecu? are you throwing any codes?

[abguy]

anyone have any more suggestions?

[C_CRX]

I suggest checking all your grounds. A bad ground will cause what you described (my CRX was doing what you described and it ended up being a bad ground). Also check things like your main relay. Are you getting a check engine light? Might also be the time to do some maintenance like fuel filter, new plugs, cap/rotor, etc.. Just some thoughts.