engine "hunting" [Archive]

SIKCVC

14-02-2005, 08:38 PM

yeah, I just got most of it sorted out, but the engine is still guttless and it still hunts, it wont stop. I did what james suggested and cleaned out the TB sensors btu it hasn't done anything the things still dont work right. Any other ideas? apparently all the other sensors are working fine.

BLKCRX

14-02-2005, 11:13 PM

Time 2 do round 2 of testing.... did u do eveything thow LOL valve clearences ? upper engine cleaner ? and eveything else ???

If so next is compression tests
check mainfold both intake and exhaust bolts make sure the gaskets arn't leaking
check fuel pressure
check exhaust leaks
check the cat

Then its onto round 3 if those things check out ok ;) call me there's 101 more things to keep checking.

Regards James

SIKCVC

15-02-2005, 01:07 AM

I drove the car tonight, it seemed to have its power back... it was lacking a little luste, but thats it.

SIKCVC

15-02-2005, 12:04 PM

nope no leaks from the manifolds... if there is its stupidly small.

ECU-MAN

15-02-2005, 07:28 PM

have you checked the IACV, tried to clean it ???, also if you have a good one try to replace it as a test, also, you need to fond out if your running rich, take a plug out and read the plug, is it really black...is your exhaust tip sooty ???

SIKCVC

15-02-2005, 08:31 PM

Yes it is a bit rich, but i dont think its too bad now... its deffinatly a faulty sensor coz when the car idles fine like it should... it runs fine too. Then I'll stop or notice it lagging and the idle problem is back. So the power problem and the crappy idle are deffinatly interelated.

I cleaned the IACV too.

ECU-MAN

15-02-2005, 08:33 PM

when Hondas run rich they hunt, if you can stop that you will fix it.

check your ecu, also the O2 sensor

wynode

15-02-2005, 09:09 PM

Can someone define "hunting" ?

DLO01

15-02-2005, 09:13 PM

Can someone define "hunting" ?
Periodic increase in Rpm then decrease in Rpm, recouring.

SIKCVC

15-02-2005, 09:50 PM

when Hondas run rich they hunt, if you can stop that you will fix it.

check your ecu, also the O2 sensor

james has check all my sensors... they're all operating.

SINISTR

15-02-2005, 10:11 PM

im not sure if this would be relevant - unsure of the motor you are running, BUt - ive come accross many instances where honda engines will hunt because of the CHOKE.

at the back of the throttle body, you will find the choke valve, check that the pipes are hot when the car is Hot, otherwise you could have a blockage and the choke comes on, overfuels the car and in the end Hunts.

Alternatively - (this is on the Dseries not sure about B) on top of the choke you will have a little lid - inside the choke there are couple o-rings, and one on the lid - IF - these are old, and worn - there will be an air leak and also will cause the engine to hunt, when hot.

mike

pillow

15-02-2005, 10:28 PM

It might be worthwhile to check your FITV (I tink this might be what SINSTR is talking about). The big, white plastic screw inside your FITV can come loose overtime causing weird idle problems. Anyways, here's a good link about how to fix etc your FITV:

http://honda-tech.com/zerothread?id=699787&page=1

SIKCVC

15-02-2005, 10:59 PM

thanks guys, i'll rip it off again tomorow and double check it all. lol... it was sitting flush.

SIKCVC

16-02-2005, 02:32 PM

ok, its still hunting... but not as bad... now its between 950-1200.

VTEChnique

16-02-2005, 03:21 PM

did you check your plugs yet ??

though sounds to me like an O2 sensor if it's not the IACV.

BTW, the FVIV (choke-like device) is ONLY fitted on OBD-0 hondas..
EF civic is OBD-0, EG is OBD-1, EK is OBD-2..

ProECU

16-02-2005, 04:24 PM

Not sure about your setup ( I remember you did a B16 conversion) but check the following

1. Check TPS Voltage, .45V closed & 5V at WOT. If the TPS voltage is not corect, the ECU will dump fuel, causing a rich condition => Hunting
2. Check Base Timing, should be 14degrees. Fix if otherwise.
3. If you're running larger injrctors => rich

good luck

SIKCVC

16-02-2005, 10:35 PM

Ok, the only things left to check are what james has suggested... and the TPS co everything else is done :S

ECU-MAN

16-02-2005, 10:58 PM

just coz you cleaned your IACV, doesnt mean its OK, it still could be at fault, see if you can borrow one from somebody and try swapping it over. reset your ECU after swapping it

SIKCVC

16-02-2005, 11:11 PM

will do!

SIKCVC

03-03-2005, 06:00 PM

Ok I replaced the IACV and the engine is still idling at 1200RPM and still hunting... WTF could be causing this?

87teg

03-03-2005, 06:40 PM

I'd suggest trying a different 02 sensor - you've mentioned that your current one is working however the rate of response may be low - I had the same problem in my car after a rebuild on the engine...turned out that the 02 sensor was playing up - lacked power in the rev range but also hunted when idling, replaced the 02 sensor and it went away. :honda:

SIKCVC

03-03-2005, 11:06 PM

thanks I was thinking along the same lines as i had the same trouble with my ZC... replaced it and it solved one of a few problems...

tegstar83

04-03-2005, 12:14 AM

Did u change ur coolant recently??
If so take the cap or the radiator and turn the car on and let run for and hour (i know seems like ages but the fans will come on and keep temps dowm dont drive just idle)
this will bleen the radiator and engine of any air in the system and should stop hunting u will c bubbles come up every now and then from the radiator. When thats done just top up any coolant needed.

SIKCVC

04-03-2005, 04:18 PM

well its a free option so i might as well try it.

PS the o2 sensor didn't fix it either.

SIKCVC

04-03-2005, 05:03 PM

nope that didn't work either... comeon honda tech dudes... You guys should have more ideas, i've already wasted $200 on parts i didn't need, there has to be more money i can waste on this POS!

tegstar83

04-03-2005, 08:09 PM

Simple........go to mechanic
Done!

87teg

05-03-2005, 10:59 AM

Last thing I can think of is the fast idle valve on the inlet manifold - if its getting old it can cause a hunting problem as they bleed too much air and get stuck...this would normally only happen when the cars warming up or has just been started.. costs about $150 from Honda.

SiR JDM

05-03-2005, 02:46 PM

Nick, check your Idle screw.. i know once mine got loose and i had the same problem... the more id drive the more it would loosen and the whole car just ran like shit.. idling in the teens, throttle responce was horrible...

Tightened it back up and it drove like a dream again =]

also when you replaced your IACV did u clean it? if not, take that shit back and out drown the bitch in carbi cleaner .. a tiny bit of carbon build up can throw your air flow out of whack... let me know bro!

SIKCVC

07-03-2005, 01:07 PM

The car drives pretty good it just idles all over the place.

The IACV is clean yeah, well as clean as you can get it.

The fast idle valve on the bottom of the intake has been cleaned and tightened up too. As soon as i fixed that up the initial idle speed when cold dropped from 2200 to 1600 where it should be.

SiR JDM

07-03-2005, 05:54 PM

Yea the FTIV can come loose and be a problem.

So everythings all good mate?

SIKCVC

14-03-2005, 11:48 PM

Ok, the problem doesn't seem to be intake related. I've sorted it out best i can but its still hunting every now and then after hot running/sitting at lights. however if you switch the engine off then start it up again it stops, which makes me think its elec related... ideas?