no power
- tim_81coupe
- General Member
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- Joined: Tue Oct 04, 2005 10:00 am
- Location: Perth
My wife took it to highway subaru they gave it a (complete upper cylinder clean out ???? found 2 codes cleared then took it for a road test rechecked codes and all appear ok) that is what they said on the report when i got home i took it for a drive thay have put the idle up to about 1250 rpm too fast and for the first time i felt the shudder it didn't feel like the engine it felt like the auto was not disengaging when slowing down i popped it into neutral and gave it a rev it seemed ok it didn't shudder or misfire i will get her to take it back to slow the idle down. Dave do you own the buggy from byb bbq if so i'm jan hi
Hmmm, sounds like they had no idea what they were doing. Looks like:
1. They did something that probably didn't really need doing (upper cylinder clean - although probably nice to give the car a bit of a treat).
2. Introduced another problem (fast idle).
3. Didn't fix what you took the car in for.
If I were you I'd be taking it back to get them to fix the idle issue, then looking for a new mechanic.
1. They did something that probably didn't really need doing (upper cylinder clean - although probably nice to give the car a bit of a treat).
2. Introduced another problem (fast idle).
3. Didn't fix what you took the car in for.
If I were you I'd be taking it back to get them to fix the idle issue, then looking for a new mechanic.
- tim_81coupe
- General Member
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- Joined: Tue Oct 04, 2005 10:00 am
- Location: Perth
You can adjust the idle via the idle screw on the side of the throttle body (touches the throttle linkage). Subaru did this when my mum asked for the idle to be turned up slightly on the Forester. The screw allows manual adjustment of base idle, and doesn't interfere with the ECU's idle up/down functions (as this is carried out by the BAC).SuBaRiNo wrote:idle is meant to be controlled by the ECU... so it being higher now is a little odd.
Dave
- hughybabes
- Junior Member
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- Location: upwey/ victoria
- tim_81coupe
- General Member
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- Joined: Tue Oct 04, 2005 10:00 am
- Location: Perth
MAF - Mass Air Flow. Basically this sensor counts the volume of air entering the engine, and from this the ECU calculates engine load and thus adjusts the amount of fuel accordingly. The 02 sensor is the telltale on this, basically lets the ECU know how much fuel was actually burnt.
BAC - Bypass air controller. Allows the ECU to move the idle from its base, ie raise it when the A/C is switched on, when the power steering is getting a workout on the spot (carpark), even when the car is put into gear on some models. Oh, and allows a high idle on cold start. In simple terms it consists of a pipe that bypasses the throttle body that has a computer controlled valve in it, meaning that the engine idle is not set by the position of the plate alone. It does NOT set base idle.
BAC - Bypass air controller. Allows the ECU to move the idle from its base, ie raise it when the A/C is switched on, when the power steering is getting a workout on the spot (carpark), even when the car is put into gear on some models. Oh, and allows a high idle on cold start. In simple terms it consists of a pipe that bypasses the throttle body that has a computer controlled valve in it, meaning that the engine idle is not set by the position of the plate alone. It does NOT set base idle.
- hughybabes
- Junior Member
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- Location: upwey/ victoria
- tim_81coupe
- General Member
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- Joined: Tue Oct 04, 2005 10:00 am
- Location: Perth