321 code in 740 wagon

[JB]

I'm getting a 321 code in my '91 740 wagon. It has a Regina system. My
repair manual states that it is related to cold start valve. I don't seen
any leakage or anything around the valve. It normally starts without any
problem-but I live in the south and not too cold right now.
The manual states that there is an "auxiliary" relay that is related to the
cold start valve. I see two relays right about the battery area.
Does anyone have any similar experience or suggestions?
Thanks,
JB

 

[Glenn Klein]

I'm getting a 321 code in my '91 740 wagon. It has a Regina system. My
repair manual states that it is related to cold start valve. I don't seen
any leakage or anything around the valve. It normally starts without any
problem-but I live in the south and not too cold right now.
The manual states that there is an "auxiliary" relay that is related to the
cold start valve. I see two relays right about the battery area.
Does anyone have any similar experience or suggestions?
Thanks,
JB

321 Cold Start injector short-circuit to ground or missing
There was a service correction were the cold start injector was
disconnected setting a 321 code as a permanent fault if this is the case
this code will always be set & unable to be cleared
Glenn

--
"*-344-*Never Forgotten"
Is for the New York City Firemen who lost their lives on September 11,2001.
The official count is 343, but there was also a volunteer who lost his life
aiding in the initial rescue efforts. And I will never forget them as
long as I live,
nor should any American.

 

[Peter K L Milnes]

Glenn, could you let me have a copy of the service correction, as my '91
Green book shows a cold start injector for Regina (B230F) in the wiring and
in component location diagrams. Amongst all my service and correction notes
I have no mention of this particular note.

JB, the relay you refer to is the Radio Suppression relay and sits by the
right hand strut tower. It is the common feed for all the injectors and is
switched from the fuel relay.

All the best, Peter.

700/900/90 Register Keeper,
Volvo Owners Club (UK).

 

[James B.]

Thanks Peter.
Are cold start injectors very prone to break down?
JB

 

[James Sweet]

Thanks Peter.
Are cold start injectors very prone to break down?
JB

I've worked on a lot of Volvos, and I've not had one single cold start
injector fail.

 

[James B.]

I noticed a 233 code yesterday. cleared it and drove about 100 miles.
checked again today and still there.
could this be related to the shudder problem and rough idle in cold weather?
thanks,
James B

 

[Peter K L Milnes]

Code 2-3-3 refers to "Adaptive idling control out of operating limits". This
is, of course, on Regina system only. The accompanying symptom is given as
"Idle speed too high or too low". Did you say that you had cleaned and
checked the Idle Air Control Valve and it's connection? Could be worth
checking the Inlet Manifold Pressure Sensor and the Air Intake Temperature
Sensor and their wiring as they could also be the cause of the shudder and
rough idle when cold.

All the best, Peter.

700/900/90 Register Keeper,
Volvo Owners Club (UK).

 

[James B.]

Peter,
No, the idle air control valve has not been checked.
Will do so.
Will also have sensors checked as you recommended.
Thanks,
James

 

[User]

Peter,
No, the idle air control valve has not been checked.
Will do so.
Will also have sensors checked as you recommended.
Thanks,
James

Make sure the white nylon vacuum line from the manifold to the manifold
pressure sensor is routed over the top of the manifold and not below it.
Make sure the line is clear and that the elbow feeding the MAP sensor is
not cracked, broken or deformed.

Bob