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lara_hofmann8
Toyota iQ Diesel Fuel Issues
8 comment(s)
lara_hofmann8 (Author)
I inspected the air filter and it seems okay. I visually examined the area around the fuel injectors, but I didn't see any obvious leaks. The iQ's engine bay is cramped, so my inspection may not have been thorough. Could a defective cable or plug connection explain these symptoms?
hermann_taylor50
Yes, a defective cable or connector can absolutely cause those issues. Fuel injectors need a proper signal to work correctly, and if that signal is weak or intermittent due to a bad connection, you'll get poor fuel delivery. Given your symptoms and the possibility of a wiring issue, it's probably best to have a workshop take a look. They can diagnose the electrical connections properly and ensure all the injectors are firing correctly. It sounds beyond a simple fix.
lara_hofmann8 (Author)
Following your recommendation, I took the car to a local workshop. Their diagnosis confirmed a defective plug connection to one of the fuel injectors. Repairing the connection resolved all the issues, and the total cost was 95€ Thank you again for your assistance.
Megiq
Quotation:
@lara_hofmann8 wrote on
Following your recommendation, I took the car to a local workshop. Their diagnosis confirmed a defective plug connection to one of the fuel injectors. Repairing the connection resolved all the issues, and the total cost was 95€ Thank you again for your assistance.
Hello, I have the same problem, could you tell me which connections they changed for you? Thanks in advance.
(Translated from French)
Megiq
Quotation:
@lara_hofmann8 wrote on
Following your recommendation, I took the car to a local workshop. Their diagnosis confirmed a defective plug connection to one of the fuel injectors. Repairing the connection resolved all the issues, and the total cost was 95€ Thank you again for your assistance.
Hello, I have the same problem, could you tell me which connections they changed for you? Thanks in advance.
(Translated from French)
CarlyMechanic
Quotation:
@Megiq wrote on
Hello, I have the same problem, could you tell me which connections they changed for you? Thanks in advance.
It's likely that the workshop repaired or replaced the electrical connector or wiring leading to one of the fuel injectors. I recommend checking the connections to each injector for any signs of damage or corrosion. If you're not comfortable doing this yourself, it might be best to have a professional inspect it. Let me know how it goes or if you have any other questions!
CarlyMechanic
Quotation:
@Megiq wrote on
Hello, I have the same problem, could you tell me which connections they changed for you? Thanks in advance.
It's likely that the workshop repaired or replaced the electrical connector or wiring leading to one of the fuel injectors. I recommend checking the connections to each injector for any signs of damage or corrosion. If you're not comfortable doing this yourself, it might be best to have a professional inspect it. Let me know how it goes or if you have any other questions!
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hermann_taylor50
Those symptoms sound like a fuel issue, especially with the diesel engine. The stalling and smoke point strongly towards that. Have you checked the air filter recently? A clogged air filter can restrict airflow and cause incomplete combustion, leading to similar symptoms like reduced power and smoke. When you checked for leaks, did you specifically look around the fuel injectors themselves? Sometimes a small leak there can be hard to spot but will definitely impact performance and fuel consumption. That's usually easy to tell if you can smell fuel when the engine is hot!