SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (ENGINE CONTROL SYSTEM - 4.2L - TROUBLESHOOTING & DIAGNOSIS)SURGES/CHUGGLES
2006 Isuzu Ascender S, 5.3 M, 4WD

Section 3 (Engine Control System - 4.2L - Troubleshooting & Diagnosis): Surges/CHUGGLES

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Surges/CHUGGLES
WARNING: This page is about a different variant/trim than selected.
Surges/Chuggles

Inspections Action
DEFINITION: The engine has a power variation under a steady throttle or cruise. The vehicle feels as if it speeds up and slows down with no change in the accelerator pedal position.
Preliminary Inspections
  • Refer to Symptoms - Engine Controls .
  • Be sure that the driver understands the torque converter clutch operation.
  • Be sure that the driver understands the A/C compressor operation.
  • Ensure that the transmission fluid is at the proper level.
Sensor/System Display the scan tool parameters for the various engine controls sensors. Inspect for any abnormal readings.
Fuel System
  • Inspect for a rich or lean symptom that causes the condition. Drive the vehicle at the speed of the complaint. Monitoring the fuel trim will help identify the condition.
    • Lean-The long term fuel trim will be more than 150.
    • Rich-The long term fuel trim will be less than 115.
  • Test the fuel pressure while the condition exists. Refer to Fuel System Diagnosis .
  • Inspect the in-line fuel filter for a restrictions.
Ignition System Inspect the spark plugs. Remove the plugs and inspect for the following conditions:
Additional
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.