Idle problems after Converter install.
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Teching In
Joined: Oct 2005
Posts: 9
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Idle problems after Converter install. 2002 TA bone stock 50k miles with a 2800-3200 Lock up Converter. I have drove the car 100 miles a day for the last two weeks.
Car is stalling at low rpms mainly when turning, or at low speeds with the a/c on when stopping. The car idles in gear at 600 rpms. When it starts acting up the tach bounces beween 400 and 600 rpms.
The car would not idle at all after installing the converter. I had to hold the throttle to keep it running, after about 2 minutes it seemed to be ok.
The new converter was much lighter then the stock converter. Could this be causing the problem?
Will this require a tune?
Is there a simple way to idle up the engine permanently?
Any help will be appreciated, thanks John.
Car is stalling at low rpms mainly when turning, or at low speeds with the a/c on when stopping. The car idles in gear at 600 rpms. When it starts acting up the tach bounces beween 400 and 600 rpms.
The car would not idle at all after installing the converter. I had to hold the throttle to keep it running, after about 2 minutes it seemed to be ok.
The new converter was much lighter then the stock converter. Could this be causing the problem?
Will this require a tune?
Is there a simple way to idle up the engine permanently?
Any help will be appreciated, thanks John.
The lighter converter changes the dynamics of the motor
and can make the idle loop unstable. Especially if it's also
fighting some other issues like rich idle mixture. You need
the idle loop to respond faster. More idle spark advance,
a better setup on the adaptive spark (stock tables can
be prone to "crash" idle as they quit advance beyond a
certain RPM-error) and bump up the base airflow so the
idle loop fights to bring it down, not fights to keep it up,
will all help with stalling. I also raised my idle RPM to 700
just to make life easier.
This all wants tune adjustments.
and can make the idle loop unstable. Especially if it's also
fighting some other issues like rich idle mixture. You need
the idle loop to respond faster. More idle spark advance,
a better setup on the adaptive spark (stock tables can
be prone to "crash" idle as they quit advance beyond a
certain RPM-error) and bump up the base airflow so the
idle loop fights to bring it down, not fights to keep it up,
will all help with stalling. I also raised my idle RPM to 700
just to make life easier.
This all wants tune adjustments.
Holy **** this is the same problem ive been dealing with ever since i swaped out the m6 for an a4. Its the most annoying thing. The car runs great but when im coming up to a stop light below 10mph it starts surging. Im going back to the dyno in a couple weeks. Im going to have my tuner look at what jimmyblue suggested. Thanks.
