Cold starts perfect, Warm starts stalling.
05-22-2013, 04:16 AM
#1
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Cold starts perfect, Warm starts stalling. Hey guys, I've got an 01 ws6 with a cam (232/236 .575 .578 on 112 lsa). Cold starts it starts perfect, but when the car is warmed up, the RPMs will flutter and stall, or come verrry close to stalling. It's been doing this for a few months, the cam is not recently installed. I had it recently tuned, hoping that would clean it up but it didn't. Any ideas? From what I've read it could possibly be the IAC? Anyone else having a similar issue?
Thanks in advance!
Thanks in advance!
05-22-2013, 01:03 PM
#2
Cold = Open Loop
Warm = Closed Loop with O2 Sensor Input
If a vehicle has issues once it has warmed up, then look at those inputs the PCM uses, such as (in this order) the: pre-cat O2 sensors, post-cat O2 sensors, IAT sensor, Coolant Temp sensor, MAP & MAF sensors.
Good Luck!
Warm = Closed Loop with O2 Sensor Input
If a vehicle has issues once it has warmed up, then look at those inputs the PCM uses, such as (in this order) the: pre-cat O2 sensors, post-cat O2 sensors, IAT sensor, Coolant Temp sensor, MAP & MAF sensors.
Good Luck!
05-22-2013, 04:28 PM
#3
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check engine light on?
what code is in there?
might be a crank sensor. P0335
after it warms up and starts acting up, shut it off and pour water
on the pass side rear of engine where sensor is from hose for couple min
to cool sensor.
start it up and see how it runs. that's just a trick to check if heat is a issue
what code is in there?
might be a crank sensor. P0335
after it warms up and starts acting up, shut it off and pour water
on the pass side rear of engine where sensor is from hose for couple min
to cool sensor.
start it up and see how it runs. that's just a trick to check if heat is a issue
05-22-2013, 08:40 PM
#4
check engine light on?
what code is in there?
might be a crank sensor. P0335
after it warms up and starts acting up, shut it off and pour water
on the pass side rear of engine where sensor is from hose for couple min
to cool sensor.
start it up and see how it runs. that's just a trick to check if heat is a issue
what code is in there?
might be a crank sensor. P0335
after it warms up and starts acting up, shut it off and pour water
on the pass side rear of engine where sensor is from hose for couple min
to cool sensor.
start it up and see how it runs. that's just a trick to check if heat is a issue
.
05-22-2013, 08:42 PM
#5
Hey guys, I've got an 01 ws6 with a cam (232/236 .575 .578 on 112 lsa). Cold starts it starts perfect, but when the car is warmed up, the RPMs will flutter and stall, or come verrry close to stalling. It's been doing this for a few months, the cam is not recently installed. I had it recently tuned, hoping that would clean it up but it didn't. Any ideas? From what I've read it could possibly be the IAC? Anyone else having a similar issue?
Thanks in advance!
Thanks in advance!
.
