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IMPORTANT: Do not pulse fuel more than once per cylinder. Start and run the engine briefly after pulsing fuel once into all
cylinders. This clears excess fuel from the intake ports. Failure to do so could cause difficult starting, severe engine flooding,
catalytic converter damage, or fire.
3.3.8.
Connect the black clip (negative) to the negative terminal of the vehicle's battery and the red clip (positive) to the positive terminal of
the vehicle's battery.
3.3.9.
Carefully disconnect wiring harness from fuel injector to be tested. Note: Do not jerk or pull on wires - some harnesses are attached
with clips. It is a good idea to test injectors in sequence, beginning with cylinder No.1.
3.3.10.
Connect tester to fuel injector. For most injectors it does not matter which wire is connected to which terminal on the injector.
Make sure the injector adaptor wires are securely fastened to the fuel injector terminals and that there is no exposed metal between
them.
3.3.11.
Re-pressurise fuel system as described in 3.3.4. Be sure that fuel pressure is stable before continuing. Record this initial fuel
pressure for reference.
Note: Fuel system must be re-pressurised to manufacturer's specifications before testing each fuel injector.
3.3.12.
Select one of the tester's modes by pressing the MODE SET button, the mode No. will be displayed:
Single Pulse test will test for clogged injectors, Multiple Pulse tests will test for sticky or sluggish injectors.
MODE 1 - LONG - the tester outputs 1 pulse which lasts for approximately 250ms.
MODE 2 - MEDIUM - the tester outputs 50 pulses, each pulse lasts for approximately 7ms.
MODE 3 - SHORT - the tester outputs 100 pulses, each pulse lasts for approximately 3.5ms.
MODE 4 - CONTINUOUS - the tester outputs pulses continuously at the approximate rate of 50 pulses per 1450ms, each pulse
lasts for approximately 7ms. This mode can be cancelled at any time by pressing the MODE SET button again.
3.3.13.
Press the PULSE button to energise fuel injector. The Pulse Indicator will light as injector is energised by the tester.
3.3.14.
Record fuel pressure drop, 2 to 3 seconds after pulse.
Note: Make sure that each injector's pressure drop is recorded after the same elapsed time after the pulse. If this time interval
varies, the test results will be inaccurate due to normal fuel system leakdown.
3.3.15.
Repeat steps 3.3.9. to 3.3.14. with the next injector, until all injectors have been tested.
3.3.16.
After testing all injectors in one position (Single or Multiple), repeat test procedure with a pulse mode in the other position.
3.4.
Fuel Injector test results.
3.4.1.
Compare the pressure drop values for each injector (recorded at 3.3.14.). Any injector showing a result significantly different
(more than ± 2.0 psi) from the others should be retested to be certain that there were no variations in the test procedure.
Single Pulse test: Clogged injectors will show less pressure drop than healthy injectors. Leaking injectors will show greater
pressure drop than healthy injectors.
Multiple Pulse tests: Sticky or sluggish injectors will show less pressure drop than healthy injectors.
3.4.2.
Flush or clean any injector which continues to show a variation of more than 2.0 psi when compared to the other injectors.
Note: Be sure to compare readings taken during Single and Multiple pulse testing separately. Pressure drop values for single pulse
tests can be very different from values for multiple pulse tests.
3.4.3.
Retest and then replace any injector which has not improved after being flushed or cleaned.
3.4.4.
When finished testing, disconnect tester leads from the fuel injectors. Note: Always grasp adaptor ends near terminals, when
removing from injectors, to prevent damage. Do not tug or jerk adaptor wires from terminals.
3.4.5.
Remove tester clips from vehicle's battery.
3.4.6.
Fully depressurise fuel pressure gauge and fuel system.
a)
Schrader valve - when removing gauge from schrader valve use a rag to cover the valve in case fuel sprays out.
Replace schrader valve cap. Note: Fuel system may still be under pressure, even if the engine is not running. Clean all
fuel spills immediately.
b)
Fuel line adaptors - remove adaptors using tools and procedure as outlined in vehicle service manual. Reconnect all fuel
lines. Test for leaks. Clean up all fuel spills immediately.
IMPORTANT: Follow all procedures outlined in the fuel pressure gauge instruction manual for the safe way to remove the gauge
from the schrader valve or fuel line adaptor.
3.4.7.
If the excess fuel in the intake ports has been purged, by starting the vehicle after each injector test, reconnect all injector wiring
harnesses to injectors.
IMPORTANT SAFETY NOTE: If excess fuel has NOT been purged following each injector test, vehicle damage may result
when engine is started. To clear excess fuel, disconnect ALL fuel injector harnesses and then crank engine. Engine may
start and run roughly, then die. This is normal. Reconnect all injectors.
4. MAINTENANCE
4.1.
Keep the tester's electrical connections clean and free of corrosion.
4.2.
If tester face becomes dirty, wipe clean with a damp cloth. DO NOT use strong solvents as they may remove face printing.
4.3.
Use care to prevent the tester's wiring insulation from becoming chafed or broken. Do not use tester if insulation or wiring is damaged.
4.4.
When not in use, store instrument in a safe, dry, childproof location.
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of this product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: For a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
Sole UK Distributor, Sealey Group,
Kempson Way, Suffolk Business
Park, Bury St. Edmunds, Suffolk,
IP32 7AR
Original Language Version
01284 757500
Web
01284 703534
email
www.sealey.co.uk
sales@sealey.co.uk
VS211.V2
Issue: 1 - 28/06/10
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