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Gauges and Accessories› Individual Gauges
AutoMeter
Autometer Sport-Comp 52mm Wideband Air/Fuel Gauge
SKU: A00Q 3378
Moderate — 2–4 hours
Overview
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Part #: 3378
Knowing The Exact Air/Fuel Mixture Running Through Your Engine Is The Most Important Factor To Extracting The Highest Levels Of Performance And Durability. Not All Wideband Gauges Are Created Equal. Autometer Utilizes An Advanced Calibration Method That Automatically Calibrates Your Gauge On Every Startup To Assure You Of The Highest Degree Of Accuracy Over The Entire Lifespan Of Your Sensor (No Free Air Calibration Is Ever Necessary). Compatible With Nearly All Fuel Types, The Autometer Pro Wideband Has A Configurable Display To Pinpoint The Exact Range You Want To Keep An Eye On. An Advanced Peak Recall Function And Lean Warning System Make Sure You" Re Safely Making Power, Whether On The Track Or On The Street. An Automatically Dimming Display Tailors Light Output For Any Condition. Data Logging Output Is Included For One Wire Or Two Wire Systems In Both Lambda Or Afr. Our Specially Designed O2 Sensor And Wiring Harness Are Included For Ease Of Installation. Quite Simply, There Isnt A More Accurate Or Easy To Live With Wideband Gauge Available On The Market.
Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, mounting hardware, and detailed instructions for installation
Vehicle Symptoms
- Poor fuel economy and black smoke from exhaust
- Rough idle and hesitation during acceleration
- Lack of power under load, stalling
- Check engine light for fuel trim codes
- Engine runs rich or lean after modifications
Diagnostic Codes
- P0171 – System Too Lean (Bank 1)
- P0172 – System Too Rich (Bank 1)
- P0174 – System Too Lean (Bank 2)
- P0175 – System Too Rich (Bank 2)
- P0300 – Random/multiple cylinder misfire detected
Relevant Conversations
- Best wideband air fuel ratio gauge for tuning
- How to install Air/Fuel Ratio-Pro Gauge AutoMeter 3378
- P0171 code after CAI install – need wideband?
- AutoMeter vs AEM AFR gauge review
- DIY wideband gauge install wiring harness
- Can I use this gauge with Holley ECU?
- Symptoms of lean condition – car hesitates
- Wideband O2 sensor vs narrowband for tuning
- Where to mount AFR gauge on dashboard
- Co-purchase: wideband gauge for turbo build
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | AutoMeter |
| Part Number | A00Q 3378 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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