How to check the Idle Control Valve and Oxygen Sensor on 1993 Audi 90?

Idle speed boost (engine JN), test CO is affected by hose clamping and lambda probe test. To accomplish cold acceleration enrichment, check differential pressure regulator current response. To re-start and warm up enrich, verify present rise and drop time. There are also procedures of lambda control (engine PS), cold start valve, thermotime switch, auxiliary air valve, throttle setting.

Genuine 1993 Audi 90 Idle Control Valve

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1 Idle Control Valve found

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1993 Audi 90 Idle Speed Control Part Number: 078-133-455-A
$522.41 MSRP: $731.67
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Product Specifications
- Other Name: Valve
- Replaces: 077-133-455-A
- Item Weight: 1.00 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 078-133-455-A
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
More Info
Fits the following 1993 Audi 90 Submodels:
- Base, CS, S, Sport | 6 Cyl 2.8 L GAS

1993 Audi 90 Idle Control Valve Parts and Q&A

Q: How to check the Idle Control Valve and Oxygen Sensor on 1993 Audi 90?
A: Idle speed boost (engine JN), test CO is affected by hose clamping and lambda probe test. To accomplish cold acceleration enrichment, check differential pressure regulator current response. To re-start and warm up enrich, verify present rise and drop time. There are also procedures of lambda control (engine PS), cold start valve, thermotime switch, auxiliary air valve, throttle setting.