Need help very bad FC

[hisham7780]

Greeting for all members, I'm new comer here.
My accord run with H22A engine recently keeping my pocket dry. For town driving RM20 @ 10 ltrs -> 50km ; before 10ltr-> 120+ km. During morning engine warm-up, I can smell unburned petrol. Sent for tuning but not much different.
pls advise wat to do.

 

[Raja_Mongkut]

unburnt petrol.. afr too rich perhaps? leaking hose perhaps?

but its usual for morning startups to run rich, coz o2 sensor not functioning properly yet

 

[boyzone]

Is ur car still in stock condition ??
few items u need to check, first is ur O2 sensor and another item in ur map sensor .
Check also on ur TPS, see whether is it in correct voltage range or not.

 

[hisham7780]

Basically in stock condition. Not much engine mod. except x-owner installed micro compressor + surbo still fixed.
hav chk O2 sensor result 0.3 V < 4500 rpm and >0.6 for >4500rpm, but at idling seem voltage signal not stable. Chk on heater resistance 18 ohm. Try to change but new one cost RM1200 ,
I'll chk on TPS and MAP. thks alot for the advise

 

[boyzone]

my prev H22A engine also give me 1L = 10km FC rate. ( high rev rate :D )

maybe u can look for other honda car's O2 sensor, from my understanding, doesn't mean u need to get back H22A one, even though B16A or B20B one also can be use.

 

[mrbear]

well H22A.. i guess u can search the topic of "honda prelude" in this forum.. it mix cars with H22A ..

for me.. last wednesday i full up rm60 .. so now its monday.. i need 2 fill up after this. can go for not more than 330.

stayin in shah alam working at cyberjaya.

but normal ar.. h22a.. 2.2L .. u can't compare with 1.1L car..

 

[Doink]

ooo...check ur fuel tank got leak or not..
take out all the extra item like surbo and let it run stock...better to trace the main problem...

 

[huakenny]

erm..actualy wat the main cause for bad fc ar?

last time my car is dirty tb...tat y fc was worse..get it clean n now is beter....

 

[hisham7780]

I noted yr point. Started to remove micro-compressor. Chk all vacum hoses. Engine seem run better. No time for test drive coz I suspect brake booster leaking ( got hissing sound when switch off engine ).
TB never been serviced sometime gave unstable idling. I'II try that also.