92AWDTalonTSI
10+ Year Contributor
- 334
- 7
- Jun 2, 2010
-
Somonauk,
Illinois
So, I installed a Pioneer AVIC D3. Before, we were having issues with fluctuating idle. For some reason we couldn't get it to smooth out. In link we were logging 11-13v at idle and 12-13 on cruise.
After installing the nav unit, we gave it a try in ACC mode. Nothing. The unit worked fine before on a battery. So, I started the car. And what do you know, the unit boots up in seconds. But with a flaw. if you turn ANYTHING on it shuts off. Does the same if you rev the engine up too.
So we decided to do a Saturn alt swap. The unit was a 96 amp alternator. We had it tested before leaving and it produced 110 amps. Well over what we expected. The battery PC680T, sits at 14v on idle @ the posts. In the car we see 13.7 at idle and cruise.
The alternator is wired as so:
S Out post on alternator
F A/C side fan switch. Sees load from fan when on.
L Black w/White stripe.
P Not connected
Yellow wire taped off and tucked into harness.
Now, the radio still doesn't come on in ACC. But when starting the car it does. All is fine until you turn something on. But this time it doesn't just shut off. It simply reboots. So you can turn on the headlights and it cuts out. Brakes do the same. But it boots back up fine in a matter of seconds, accessory on or off. As before, it would remain off. We are getting somewhere.
What at this point could be causing such a low voltage? I am thinking maybe an issue with the grounds? I couldn't get the throttle switch to work correctly until I realized that we had heat barrier gaskets and no matter how hard I tried I couldn't get continuity to the throttle body through a heat barrier gasket.... So I moved the rear ground to the throttle body.
Should I move it back and place a stainless ground braid from the SMIM to the throttle body?
I'm at a loss here. The idle is so unstable when the voltage drops it ridiculous.
After installing the nav unit, we gave it a try in ACC mode. Nothing. The unit worked fine before on a battery. So, I started the car. And what do you know, the unit boots up in seconds. But with a flaw. if you turn ANYTHING on it shuts off. Does the same if you rev the engine up too.
So we decided to do a Saturn alt swap. The unit was a 96 amp alternator. We had it tested before leaving and it produced 110 amps. Well over what we expected. The battery PC680T, sits at 14v on idle @ the posts. In the car we see 13.7 at idle and cruise.
The alternator is wired as so:
S Out post on alternator
F A/C side fan switch. Sees load from fan when on.
L Black w/White stripe.
P Not connected
Yellow wire taped off and tucked into harness.
Now, the radio still doesn't come on in ACC. But when starting the car it does. All is fine until you turn something on. But this time it doesn't just shut off. It simply reboots. So you can turn on the headlights and it cuts out. Brakes do the same. But it boots back up fine in a matter of seconds, accessory on or off. As before, it would remain off. We are getting somewhere.
What at this point could be causing such a low voltage? I am thinking maybe an issue with the grounds? I couldn't get the throttle switch to work correctly until I realized that we had heat barrier gaskets and no matter how hard I tried I couldn't get continuity to the throttle body through a heat barrier gasket.... So I moved the rear ground to the throttle body.
Should I move it back and place a stainless ground braid from the SMIM to the throttle body?
I'm at a loss here. The idle is so unstable when the voltage drops it ridiculous.
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