90-823225--1 10965E-118 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
HARD START (continued)
CHECK SENSORS AND CONTROLS FOR:
1. Possible open in Engine Coolant Temperature (ECT) sensor and Manifold Absolute Pressure
(MAP) sensor Ground CKT 814. Also may have set a DTC 14 and/or DTC 33.
2. Throttle Position (TP) sensor,ground CKT 813 could have a possible open and set DTC 21.
3. A sticking throttle shaft or binding linkage causes a high Throttle Position (TP) sensor voltage.
Using a scan tool and/or voltmeter, TP sensor voltage should read less than .7 volt with throttle
closed.
4. Proper Idle Air Control (IAC) operation.
CHECK ENGINE FOR:
1. Restricted exhaust.
2. Proper cylinder compression.
3. Proper camshaft timing/valve train problem.
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