LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1990 >> APV >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/O Codes >> Symptoms (Diesel) >> Low Engine Power
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Low Engine Power

LOW ENGINE POWER

Possible Cause Correction
Restricted air intake Remove restrictions
Plugged fuel filter Remove restriction and/or replace filter
Improper throttle linkage adjustment Adjust linkage
Improper fuel return system Check fuel return system
Restricted tank-to-pump fuel supply Check fuel delivery system
Incorrect or contaminated fuel Remove and replace fuel
Restricted fuel tank filter Replace filter
Nozzle or glow plug compression leaks Check fittings and replace as required
Plugged nozzle Remove restriction and/or replace nozzle