90-824052R3 JUNE 2002 FUEL SYSTEMS - 3C-53
EFI System Cleaning and
Inspection
Cleaning
1. Clean all non-electrical metal parts using a good
grade solvent.
2. Use a soft bristle brush for removing large
accumulations of dirt or grease and oil.
3. Varnish type coating of induction manifold parts
may be removed using carburetor cleaner.
4. Wiring harnesses can be wiped down with a
slightly solvent dampened rag.
5. Clean all fuel passages in induction manifold.
6. Dry all components using clean lint free cloths
that are free of abrasives such as metal shavings
or dirt.
7. Compressed air may be used to dry parts if the air
used is free of moisture and un-lubricated.
Inspection
1. Look at entire system for signs of an obvious
problem such as poor condition of wire insulation,
leaking fitting, cracked or loose hoses and lines.
2. Look for fuel or oil leaks wherever these fluids are
used (i.e. fuel filter cap, fuel pump, vapor
separator cap, etc.).
3. Check for signs of tampering or abuse such as
modifications to wiring or hose routing.
4. Look at main connector between engine harness
and ECM box for missing, corroded or bent
contact pins and socket. Check for dislodged
grommet in ECM where harness enters box.
5. Look at all sensors (throttle position, air
temperature and water temperature) connectors
and harnesses for bad connections or poor
insulation conditions such as fraying, stripping,
cracks or signs of abrasion wear.
6. Look for loose, missing or damaged mounting
hardware such as stripped threads on screws.
7. Look at sensors for signs of wear or damage such
as cracks, chips, etc.
8. Look at filter housing for cracks, holes or other
damage. Check for secure mounting.
9. Look at vapor separator for leaks, cracks, pitting
or other damage.
10. Check all rubber mounting grommets for swelling
tears, cracks or other conditions that would
render parts unserviceable.
11. Check vapor separator float for signs of fuel entry
in the float. Look at needle for wear of point.
12. Look at injectors for signs of plugging or
looseness in fit with induction manifold.
13. Look at throttle linkage for bends, kinking or
binding. Check spring for kinks.
14. Inspect all rubber seals and gaskets for swelling,
cracks or slices that would cause improper
sealing.
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