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Parts for your 1994 Suzuki Swift-Throttle position sensors
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1994 Suzuki Swift throttle position sensor (TPS): purpose, care, and when to replace
Technical references confirm the 1994 Suzuki Swift is fitted with a throttle position sensor. The Suzuki SF413/SF416 factory service manual, plus common workshop guides like Haynes/Gregory’s covering 1989–1997 Swift/Geo Metro/Holden Barina, detail TPS testing and adjustment on the throttle body. Industry databases used by workshops (Mitchell 1/ALLDATA) also list TPS diagnostic procedures for 1994 Swift engines (G10, G13, G16), so it’s definitely a used and relevant component on this model.
On a ’94 Swift, the TPS sits on the side of the throttle body and tells the engine control unit exactly how far the throttle is open. That info helps the ECU manage fuelling, ignition timing, idle control and decel fuel cut, keeping the little Swift crisp off the line and easy on fuel. When the TPS goes out of whack or wears, you’ll often feel flat spots on tip-in, a hunting idle, poor economy, or see the check engine light pop on.
As part of regular servicing, it’s worth giving the TPS and throttle body a bit of love:
- Visual check: Look for cracked wiring, a loose connector, or signs the sensor has moved on its slotted mounts.
- Clean-up: With the battery disconnected, unplug the TPS and clean the plug terminals with proper contact cleaner. Clean the throttle bore and plate so the closed-throttle position is consistent.
- Test: Using a multimeter and your workshop manual, confirm the idle switch function (where applicable) and that the output voltage rises smoothly as the throttle opens. Any dead spots or jumps mean trouble.
- Replace if needed: Replacement is usually two screws and a connector. Mark the original position, fit the new unit, then adjust it to spec.
- Adjustment: Many Swifts require setting the idle switch and closed-throttle voltage using a feeler gauge and multimeter. Follow the factory procedure so the ECU knows exactly where “shut” and “open” are.
If drivability still isn’t right after adjustment, check for vacuum leaks, a sticky throttle cable, or a tired idle control valve before blaming the new sensor. Most owners will notice an immediate improvement in throttle response and idle quality when the TPS is healthy and correctly set.
Popular questions about 1994 Suzuki Swift throttle position sensors
Where is the TPS on a 1994 Suzuki Swift?
It’s bolted to the side of the throttle body on the intake manifold, opposite the throttle cable quadrant. You’ll see a small, usually black plastic sensor with a three-wire plug and two mounting screws in slotted holes for adjustment.
Does a new TPS need calibration on a ’94 Swift?
Yes. After installation, the sensor position should be set per the factory procedure so the ECU recognises closed throttle and sees a smooth voltage sweep. Use a feeler gauge and multimeter as outlined in the service manual to confirm both the idle switch function (if fitted) and correct output at closed throttle.
Can a faulty TPS be cleaned, or does it have to be replaced?
You can clean the connector and make sure the throttle body isn’t gummed up, which sometimes helps. But if the internal track is worn or there are dead spots, cleaning won’t fix it—replacement is the reliable cure.
