Section 2 · Pages 25–44 (20 pages)

Driveability Symptoms

From the 1991 GMC Light Duty Truck Fuel, Emissions and Driveability Manual

Symptom-based diagnosis for problems that set no trouble code. After important preliminary checks it gives charts for intermittents, surges and chuggle, lack of power, detonation and spark knock, hesitation and stumble, poor fuel economy, hard starting, rough idle, dieseling, backfire and above-normal emissions or odors.

Read this section free, starting at page 25

What this section covers

  • Important preliminary checks
  • Intermittents
  • Surges and chuggle
  • Lack of power and detonation
  • Hesitation, sag and stumble
  • Poor fuel economy
  • Above-normal emissions and odors
Year
1991
Make
GMC
Vehicle
C/K Trucks, G Vans, Light Duty Trucks, M Vans (Astro/Safari), P Forward Control, R/V Trucks, S/T Trucks, Trucks
Type
Fuel & Emissions, Supplement
Models
C/K, R/V, P, G, S/T, M 10–30
Publication
X-9136
Pages
406

What’s inside

Fuel and emissions manual

  1. 1General Informationpp. 7–24
  2. 2Driveability Symptomspp. 25–44
  3. 3Computer Command Control (Scan Tool Diagnosis)pp. 45–254
  4. 4Fuel Control System (TBI 220 and 700)pp. 255–300
  5. 5Evaporative Emission Control System (EECS)pp. 301–308
  6. 6Ignition System and ESTpp. 309–318
  7. 7Electronic Spark Control (ESC)pp. 319–326
  8. 8Air Management Systempp. 327–336
  9. 9Exhaust Gas Recirculation (EGR) Systempp. 337–352
  10. 10Automatic and Manual Transmission Controlspp. 353–360
  11. 11Positive Crankcase Ventilation (PCV)pp. 361–366
  12. 12Thermostatic Air Cleaner (THERMAC)pp. 367–372
  13. 13Special Toolspp. 373–380
  14. 14Abbreviations and Glossary of Termspp. 381–384
  15. IndexAlphabetical index of subjects with section and page references.pp. 385–406

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