PRODUCT INFORMATION
INDEX
DATE
Dep. 2
IO-G-T-00-001e B
February 2016
GAS ENGINES TROUBLESHOOTING
10/10
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine oscillates
Engines with electronic carburetion and
electrical throttle:
1. Spees PID Misadjusted
2. Low voltage in throttle actuator
3. Tool
lean
mixture
4. Program
prolem
5. NOx sensor or lambda sensor failure
1. Adjust speed PID
2. Change batteries or charger
3. Adjust A/F ratio, opening the screw
4. Check
program
5. Check sensor and wire
Engines with electronic carburetion and
electric throttle:
Speed PID misadjusted
1. Low voltage at throttle
2. Too lean mixture
3. Problem with program
You need to have good knowledge of the
control system in order to solve program-
related issues
1. Adjust speed PID
2. Change batteries or charger
3. Readjust carburettor mixture valve
4. Check
program
Clogged air filters
Change filters
Ignition fails
1. High voltage wires
2. Coils
3. Damaged spark plugs or inadequate gap
4. Defective
ignition
module
1. Change
faulty
wires
2. Change defective coils
3. Regap or change spark plugs
Change ignition module
Low or fluctuating gas pressure
Change regulator and, if problem is due to
gas supply, contact your supplier
Dirty air cooler
Clean cooler
Turbochargers in bad condition
Change turbochargers
6.1.10
O&M_2.002211.810_A_10_2016