4
98
ENGINE EXHIBITS HARD START SYMPTOMS
Definition:
Engine cranks OK, but does not start for a long time. Engine does run, or may start but immediately die.
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 filter
• 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
CHECK/
RELIEVE FUEL SYSTEM PRESSURE
in
SECTION 5 -
REMOVAL/INSTALLATION
.
Is a problem found?
Repair
Go to step 5.
5
Check battery as follows:
• Look for loose or corroded terminals.
• Verify 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
Check for proper TPS operation, if equipped.
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.
Continued...
Not for
Reproduction
Содержание VANGUARD M490000
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