Mariner Mercury 105/140 JET, Руководство по обслуживанию

Страница: 309 / 797

3D-36 - FUEL SYSTEMS 90-824052R3 JUNE 2002
Results A: If fuel spray is not present in all injectors
or spray pattern is extremely weak, check
wiring harness to injector connectors, or
injector filters for plugging.
If spray patterns are available in most of the injectors,
but not all, perform Procedure B.
7. Connect EFI tester. Steps outlined in electrical
system and ECM check.
8. Connect remote starter Quicksilver
(91-52024A1) to NEGATIVE terminal of electric
fuel pump and a good engine ground. Depress
remote start switch, pump will operate as long as
switch is depressed.
WARNING
Do not operate pump for more than 20 seconds
continuously.
55197
9. Perform fuel injector test procedures (outlined)
while depressing remote starter switch.
Results B: If fuel spray is present using EFI tester,
but not present while cranking, perform
switch box DVA tests Section 2A (1, 3, 5
switch box failure).
If fuel spray pattern is equal on all injectors, system
is functioning normally.
Induction Manifold Leak Check
(Manifold Cover Removed)
Purpose: Lack of good fuel pressure may be caused
by an internal leak in the fuel induction man-
ifold and not caused by a weak pump. This
test eliminates the possibility of induction
manifold leaks as a probable cause.
WARNING
Do not start engine with induction manifold
cover removed. Disable ignition system prior to
performing this test.
WARNING
Operation of EFI system with cover removed can
allow fuel to spray components. Be extremely
careful when operating the fuel system in this
condition.
1. Remove induction manifold cover using
procedures outlined under “Induction Manifold
Removal.”
2. Reattach manifold body without cover to engine
using twelve 1/4-20 x 2-3/4
″
screws in place of
screws normally used.