D15B4 Dual Carb FSM pdf

**SINISTR** · 26-11-2008 12:47 PM

hey guys,

i've got a couple problems with idle and choke im trying to sort out on a 88 Civic with D15B4 Dual Carb motor... i've looked for a pdf'd FSM but keep finding the single carb or EFi models.

Can anyone point me in the right direction towards the correct PDF?

thanks in advance
Mike

**TODA AU** · 26-11-2008 12:49 PM

http://pdf.hondatech.com.au/Civic/HondaTech.com.au.Honda%20Civic%20(1988-90)%20Service%20Manual%20EF.zip

**SINISTR** · 26-11-2008 02:18 PM

thanks - but its what i already have in both PDF and printed versions - no Dual Carb in there tho....

**ECU-MAN** · 26-11-2008 03:28 PM

unplug the IAVC and see if it idles better,

note this will put a code in the ECU so you will have to reset it after testing

**SINISTR** · 26-11-2008 03:42 PM

this car doesn't have an ECU - and I want to have the diagrams so i can locate components - atm im stabbing in the dark where stuff is...

it hangs itself on idle when you start it - revs up to 3000 rpm, and sits there. After a while it drops down but once you turn it off and back on again it revs up again - even tho its hot already. I suspect the IACV is water operated since it an older car but I want to know exactly where stuff is so i can trace the systems etc.

**Edgeauto** · 26-11-2008 05:50 PM

The dual carbs do actually have ECUs. As ECU-MAN try unplugging the IAVC although i usally leave them connected but just block the up. If that fails you will most likely have to replace the choke assy which honda call a thermo wax valve opener. It's on the LH carby.