Briggs & Stratton BIG BLOCK EFI, Руководство по ремонту

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94 Section 4: Symptoms
Step Action Yes No
1
Perform OBD System Check.
Are any DTCs found?
Go to applicable
DTC Table.
Go to step 2.
2
Perform a careful visual check.
Is a problem found?
Repair Go to step 3.
3
Check the following fuel system components
for dirt, water, or other contaminants.
• Fuel tanks
• Fuel fi lter
• Fuel lines
• Fuel pumps
Is a problem found?
Repair Go to step 4.
4
Verify that fuel pressure is 38-43 psi (262-296
kPa). See page 104 for test procedure.
Is a problem found?
Repair Go to step 5.
5
Check battery as follows:
• Look for loose or corroded terminals.
• Verify that battery voltage is 12.2-13.5
volts.
Is a problem found?
Repair Go to step 6.
6
Check for intermittent opens or shorts to
ground in MAP sensor circuit.
Is a problem found?
Repair Go to step 7.
7
1. Check for proper TPS operation, if
equipped.
2. Verify that throttle linkage is not sticking,
binding or worn causing high TPS voltage.
Is a problem found?
Repair Go to step 8.
8
Check for proper IAC operation, if equipped.
Is a problem found?
Repair Go to step 9.
Engine Exhibits Hard Start Symptoms
(Page 1 of 2)
Defi nition: Engine cranks OK, but does not start for a long time. Does run, or may start but im-
mediately die.