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6.
FUEL PRESSURE TEST
6.1
Relieving Fuel System Pressure
NOTE! The following instructions are intended as a guide only. Always adhere to manufacturer's procedures for relieving
system pressure.
6.1.1
Before disconnecting the fuel lines to connect adaptors and pressure gauge to fuel system, the fuel system pressure must be relieved,
this will prevent fuel spraying when a joint is disconnected.
6.1.2
Switch off ignition, loosen the fuel tank cap to relieve tank pressure, then re-tighten.
6.1.3
To relieve fuel pressure, it is necessary to prevent the fuel pump operating, whilst still allowing both injection and ignition systems to
operate.
6.1.4
The procedure may simply require the fuel pump relay, fuse or electrical supply to be disconnected; some models have two fuel pumps -
make sure both are disabled.
6.1.5
Once pump(s) is/are disabled, run the engine until it stalls, and then crank over 5 to 10 times after it has stalled. On some electronic fuel
injection systems, removing the fuel pump fuse disables both the fuel pump and the injectors. In this case refer to manufacturer's
procedure.
WARNING! DO NOT assume that pressure in the fuel system has been relieved. When disconnecting, wrap a cloth around the fuel line
fitting to absorb any fuel leakage.
6.2
Connection and Usage
6.2.1
With the engine off and the fuel system pressure relieved, install the correct adaptor into the fuel system at the point to be tested and
connect to the quick coupler on the gauge hose ensuring the locking collar is in position.
NOTE! Use a cloth around the fittings to absorb any fuel.
6.2.2
Re-connect the fuel pump(s).
6.2.3
Start engine and allow to idle.
6.2.4
Read the fuel pressure on the gauge and compare to the manufacturer's specification.
6.2.5
Turn off the engine.
6.2.7
Remove the tester and adaptors from the fuel line.
6.2.8
Restore fuel line to original condition, restart the engine and check the system for leaks.
Parts support is available for this product. To obtain a parts listing and/or diagram, please log on to www.sealey.co.uk,
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.
© Jack Sealey Limited
email sales@sealey.co.uk or phone 01284 757500.
Sole UK Distributor, Sealey Group,
Kempson Way, Suffolk Business Park,
Bury St. Edmunds, Suffolk,
IP32 7AR
Original Language Version
Original Language Version
01284 757500
W e b
01284 703534
email
www.sealey.co.uk
sales@sealey.co.uk
MS100
Issue 2 (P) - 17/07/13
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