Page 1 - Tomco Sensor Product Broadsheet

THE BEST NAME TO CLEAR THE AIR

from the Fuel & Emission Specialists

THROTTLE
POSITION
IDLE AIR SENSOR
CONTROLS Inspect every 12,000 to 15,000 miles. Old Engine stalling. An LED lights when the sensor produces a high voltage and goes off when the sensor falls below a low voltage.

AIR CHANGE Sky-Guard ® coolant or improper coolant level may make the Maintenance/service: This tester makes testing an oxygen sensor simple.
TEMP SENSOR EGR VALVES sensor inoperable to give false readings.
Inspect for corrosion on terminals, check for
FUEL MASS CHOKE PULL-OFFS proper operation and adjust with each tune-up.
INJECTORS AIRFLOW What they do: AT TOMCO:
SENSORS THROTTLE POSITION
Slightly open choke plate to allow air to enter WE LISTEN
PORTED carburettor on cold start-up. SENSORS
VACUUM At Tomco Europe we are specialists in solving installer and distributor problems.
SWITCHES Failure symptoms: What they do:
PLATINUM II We listen to your comments and suggestions and incorporate them into top quality fuel and emission system parts that
OXYGEN Hard starting, rich fuel mixture, rough cold- Monitor the throttle opening for the computer to exceed OE standards and requirements. This customer first approach has helped Tomco become and remain an
SENSOR ENGINE running engine. adjust fuel flow, engine timing and trans converter industry leader for over 30 years. Today, although we do business around the globe, we take pride in our accessibility
COOLANT lock-up. and responsiveness to our customer.
TEMPERATURE Maintenance/service: Failure symptoms:
SENSOR Inspect on engine tune-up. Check when cold-
Hesitations, tip in surge, engine pinging, no torque WE INNOVATE
converter lock-up. ‘Check Engine’ light on. Employee ownership is our greatest strength.
Tomco ideas don’t get stalled in bureaucratic committees. We’re able to take risks and respond fast to changes in the
industry. Tomco’s R&D team is continually anticipating new trends. We test new products and consolidations to meet
the demanding needs of the Automotive Aftermarket.
running problems occur. Maintenance/service:
WE DESIGN
Inspect for proper operation and adjust voltages
when necessary. Check for corrosion on Our designs improve on the original.
connectors. Rather than just copying OE, Tomco leads the industry in fuel and emissions technology by improving the original
MIXTURE CONTROL equipment design. We engineer in consolidation at the same time we engineer innovation. As a result, we’re able to
MASS AIR FLOW
SOLENOIDS significantly reduce our inventory – a great advantage for Tomco distributors! Tomco designs have given birth to 12
SENSORS basic patents, including the well-known ‘DURO-7 Inlet Valve’ and the ‘Platinum II Oxygen Sensor’.
What they do:
MIXTURE Adjust fuel mixture in computer controlled What they do: WE MANUFACTURE
CONTROL carburettors based on a signal from oxygen sensor. Measure weight of the air entering the engine in
SOLENOIDS We don’t just make parts – we manufacture.
THROTTLE grammes per second.
POSITION Failure symptoms: Customer demands at the shipping dock drive Tomco’s flexible manufacturing. Our production people can change
SENSOR Rough idle, surging, poor fuel economy, high Failure symptoms: assembly lines within minutes, rather than hours or days. This allows us to respond quickly to our customers’ special
hydrocarbon emissions. Hard starting, hesitation, stalling, surging, black orders, without compromising our 98% fill rate.
CHOKE IDLE smoke, catalytic converter overheating, poor
PULL-OFFS SPEED Maintenance/symptoms: WE DELIVER
CONTROLS
At Tomco, you never get surprises – just the part you want, on time.

MAP SENSORS Perform periodic emissions checks. Replace performance and economy. poor performance and economy, high
according to manufacturer’s specifications or hydrocarbon emissions.
What they do: every 25,000 miles. Watch for service light or Maintenance/service:
Signal computer to adjust timing and air/fuel ‘Check Engine’ light. Check for trouble codes. Rap sensor sharply. Maintenance/service:
ratio based on the amount of pressure in Replace the sensor if engine stumbles when Perform periodic emissions checks. Replace
the intake manifold. CAM/CRANK POSITION rapping sensor. according to manufacturer’s specifications or
every 25 – 30,000 miles. Watch for service
Failure symptoms: SENSORS PORTED VACUUM light or ‘Check Engine’ light.
Poor performance and economy. Black SWITCHES
®
smoke, stalling, surging and catalytic What they do: SKY-GUARD EGR
converter overheating can occur. Indicate position of cam (crank) to computer. What they do:
VALVES
Maintenance/service: Failure symptoms: Act as a thermostatic switch, controlling EGR
Valve, heat riser, vacuum advance and other What they do:
Inspect during tune-up. Look for mis-
vacuum controlled devices. Re-circulate a metered amount of exhaust gas
routed, collapsed, cracked or clogged into the intake manifold to cool combustion
vacuum lines. Check terminals or broken Failure symptoms:
temperatures and reduce NOX emissions.

wires. No start, extended cranking, backfire on start Poor performance and economy. Surging, Failure symptoms:
up. chugging and engine knock. Rough idle, pinging, overheating, loss of power,
FUEL INJECTORS stalling, surging, severe engine damage caused
Maintenance/service: Maintenance/service:
What they do: by detonation.
Check trouble codes and diagnose as necessary. Inspect for damage every 6,000 to 8,000 miles.
Meter and atomise pressurised fuel delivery to Check for cracked or broken nozzles. Function Maintenance/service:
the engine. AIR CHANGE test if engine overheats. Inspect every 12,000 to 15,000 miles and

Failure symptoms: TEMPERATURE SENSORS FUEL PRESSURE during engine tune-up.
Hard starting, poor performance and What they do:
economy. REGULATORS IDLE AIR CONTROLS
Measure air temperature in the intake manifold
Maintenance/service: and signal computer to adjust air/fuel mixture. What they do: What they do:
Maintain proper fuel pressure. Adjust air-flow in the idle circuit to maintain
Failure symptoms: idle speed under various load conditions.
‘Check Engine’ light is on continuously,
Failure symptoms:

Inspect every 25,000 miles or when engine hesitation, poor mileage or strong exhaust Failure symptoms: Vehicle stalling, high or low idle speed. ‘Check
drive ability problems occur. odour. Excessive cranking on start-up. Hesitation on Engine’ light on continuously.
ENGINE COOLANT Maintenance/service: acceleration. Maintenance/service:
Inspect for damage or contamination when Maintenance/service: Check for carbon build-up on pintle and clean
TEMPERATURE trouble codes indicate problem in the circuit. Check rail pressure at each tune-up. Replace if passages every 25,000 miles. Replace according
SENSORS pressure is low. to manufacturer’s specification.
IDLE SPEED CONTROL
What they do: OXYGEN SENSOR
What they do: PLATINUM II OXYGEN
Measure coolant temperature and signal
computer to adjust air/fuel mixture. Move throttle linkage to maintain idle speed SENSORS TESTER
under various load conditions. What they do:
Failure symptoms: What they do:
Failure symptoms: Measure the amount of oxygen in exhaust and The Tomco Oxygen Sensor easily tests the
Poor performance and economy and hard
starting. Watch for service light or ‘Check signal computer to adjust air/fuel ratio. voltage output from the oxygen sensor.
Engine’ light. Failure symptoms:

Maintenance/service: Low voltage output or slow reaction causes

INC. Unit 15, Thruxton Industrial Estate, Thruxton, Andover, Hampshire SP11 8PW Tel: +44 (0) 1264 771599 Fax: +44 (0) 1264 771512 INC.