Lack of Power
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Engine delivers less than expected power. Little or no increase in speed on slight acceleration.
POSSIBLE CAUSE ACTION
Hot air tube not connected Check inlet air temperature system (HIAS)
to air cleaner - air damper in "Testing Procedures" in Emissions
door binding or not opening
EGR malfunction 1. Check EGR system in "Testing
Procedures" in Emissions, if OK, step 2
2. Check EGR electronic controls in
"Fuel Injection & Computerized Engine Controls"
Spark timing - excessive retard Check Spark Controls (SCC) in
"Fuel Injection and Computerized Engine Controls"
Initial timing incorrect Check Ignition Timing in "Adjustment
Procedures" in Emissions
Restricted exhaust Check Catalytic Converter in
"Testing Procedures" in Emissions
Poor or contaminated fuel Recommend higher grade fuel