Engine: 2.3 Carb B23A/B230K: - Intercooled turbo, idle speed leak

Rhoy002 · Oct 8th, 2015, 05:10

1986 Volvo 240 Intercooled Turbo, Carburettor model. Under cold conditions with, moderate to heavy load unless full choke, or when hot under very heavy load vehicle develops a leak from the idle speed. Turn the vehicle off and back on straight away, leak seals enough for vehicle to run normally. When leak present, vehicle runs idles erratically, stalls unless given throttle, leak coming from idle speed. Used a flat head screwdriver to feel for idle speed adjustment, and no adjustor found, used an inspection camera as well, but hard to see, and no obvious defect. Anyone encountered this type of problem before, before I start pulling carburettor off to get to the idle speed?

Derek UK · Oct 9th, 2015, 18:54

Check that the idle solenoid is working properly #11. That's the one adjacent to the hole you mention. Also any of the pipes shown.

http://www.volvopartswebstore.com/sh...ssembly=244101

Rhoy002 · Oct 11th, 2015, 23:05

Thanks for that, I will check this next. It clearly leaks from the idle air when there is a fault as you can see carbon residue around the idle air and on the bonnet shielding, as well as hear it leaking, and if you block the idle air when the fault is present you change how the engine runs, which it does not do when running normally.

Rhoy002 · Oct 16th, 2015, 23:43

I was looking through the engine bay with my cousin, currently an Alfa mechanic, and he noticed a hose off the fuel regulator, reconnected the hose and I have put a cabletie around it. Have wound her out to 7 grand on three occasions in the last 12 hours, and started from cold with no repetition of the problem, so fingers crossed its sorted. Family member noted some of the hoses are hard, should have thought to go through all of those myself, so will replace all those in the short term. Picture is of the fuel regulator in question, the guilty hose was the top one now with the black cable tie on it.

Rhoy002 · Aug 20th, 2017, 01:32

Eventually had the Carburettor rebuilt by someone who new what they were talking about. The leaking port was venting to atmosphere at times, has now be blanked off with an alloy plug and no more problems

Oct 9th, 2015, 18:54	#2
Derek UK VOC Member Last Online: Yesterday 20:59 Join Date: Jul 2006 Location: Chatham	Check that the idle solenoid is working properly #11. That's the one adjacent to the hole you mention. Also any of the pipes shown. http://www.volvopartswebstore.com/sh...ssembly=244101

Oct 11th, 2015, 23:05	#3
Rhoy002 New Member Last Online: Oct 5th, 2023 12:30 Join Date: Oct 2015 Location: Auckland View Photos By: Rhoy002	Thanks for that, I will check this next. It clearly leaks from the idle air when there is a fault as you can see carbon residue around the idle air and on the bonnet shielding, as well as hear it leaking, and if you block the idle air when the fault is present you change how the engine runs, which it does not do when running normally.

Aug 20th, 2017, 01:32	#5
Rhoy002 New Member Last Online: Oct 5th, 2023 12:30 Join Date: Oct 2015 Location: Auckland View Photos By: Rhoy002	Eventually had the Carburettor rebuilt by someone who new what they were talking about. The leaking port was venting to atmosphere at times, has now be blanked off with an alloy plug and no more problems

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