SilveR316
Veteran Member
Ok, I'm pretty sure I have it narrowed down to what it could be, but I'm without a laptop right now so I can't provide a detailed diagnosis.
Symptoms:
- Rough idle, rough engine while cruising at a steady speed
- Only happens when engine is warm, or ambient temperature is warm.
- Engine runs fine until it fully warms up and on cooler mornings
- Engine has a crispier sound than normal which indicates advanced timing (i think?)
- No shuddering while slowing down (no fueling, no shudder)
- Not slow-down shudder symptoms (easily fixed but thats not the problem)
- No shudder under heavier acceleration
After thinking about it, I'm pretty sure it was something to do with the fueling system. Since it seems temperature related (ie. never happens until the engine is fully warm and doesn't happen on cooler mornings or until after the car runs a while and the ambient temperature of the fuel has a chance to rise) I think its one of the following things:
1) Fuel temperature sensor gone south (most likely)
2) Failing injection pump
3) Failing injector/nozzle (unlikely since the race520s are rather new and haven't had any problems in the last 5000km or so since they were installed)
Before I go back to parents place to pick up my laptop and diagnose the problem properly, does this sound like a failing fuel temperature sensor to anyone else?
Symptoms:
- Rough idle, rough engine while cruising at a steady speed
- Only happens when engine is warm, or ambient temperature is warm.
- Engine runs fine until it fully warms up and on cooler mornings
- Engine has a crispier sound than normal which indicates advanced timing (i think?)
- No shuddering while slowing down (no fueling, no shudder)
- Not slow-down shudder symptoms (easily fixed but thats not the problem)
- No shudder under heavier acceleration
After thinking about it, I'm pretty sure it was something to do with the fueling system. Since it seems temperature related (ie. never happens until the engine is fully warm and doesn't happen on cooler mornings or until after the car runs a while and the ambient temperature of the fuel has a chance to rise) I think its one of the following things:
1) Fuel temperature sensor gone south (most likely)
2) Failing injection pump
3) Failing injector/nozzle (unlikely since the race520s are rather new and haven't had any problems in the last 5000km or so since they were installed)
Before I go back to parents place to pick up my laptop and diagnose the problem properly, does this sound like a failing fuel temperature sensor to anyone else?