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VEHICLE TECHNICAL QUESTION & ANSWER A RELIABLE ADDRESS TO ANSWER YOUR VEHICLE TECHNICAL INFORMATION |
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Question: Hi DTDauto, I have this question. My vehicle starts and operates normally but consumes more fuel and when I turn the accelerator harder there is smoke appearing. I have used Motoscan tool to read faults but have no result. What should I do? | ||
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Answer:
As you know, most of the OBD equipments can only read the faults belong to electric problems controlled by ECU, the equipment can not read the faults relate to mechanical problems so your vehicle may have one of the following errors:
- Mechanical fuel injector fault, injector may has worn, or dirty, stuck, stopped up in the open state. You need to rinse or replace the new injector. -"wrong values” voltage reported from intake air temperature sensor or engine coolant (less than the measured level of regulation to the ECU OBD system does not detect the faults) so the ECU will misunderstanding and regulated fuel not according to standard. - Oxygen sensor signal, this is the sensor used to correct the downstream air fuel mixture rate (AFR) - Approximately 10% of the reasons belong to electronic problems inside ECU need to Reset or replaced… - Malfunction causes of some other mechanical reasons related to phenomena such as: too much oil or improper lubrication engine, air filter stuck or exhaust tube stuck, weak compression of cylinder, EGR valve fault (if any), wore spark plugs and weak in ignition... In this case, you should use the function “show live data” of Motoscan to check, analyze data and determine the faults. But to use this function in analysis and determining fault you need to understand the electronic control techniques in PGM FI/ FI system and new generation PGM-FI technology. |
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