2.0HDI Revs out of control and high idle
Posted: Tue Feb 09, 2021 9:39 pm
Hey,
I'm having a bit of trouble with the car. This has been an ongoing issue for the last year or so. The car is fully driveable and such, but now that it has been colder, the issue starts to appear much more noticeable.
Model: 406 2.0HDI 110
Year: 2001
Motorcode: RHZ
Note: Fitted with a 1999 BSI and ECU
When driving the revs would randomly "spike" revving up and staying for 1-2 seconds before going low again. This could also be, that I removed my foot from the speeder, and the car would hold the revs without going back to normal before I slow down.
Now that it is cold it runs high idle around 1200-1300rpm going up and down a bit. When I do a cold start, it's also very easy to stall. This means I can't get the car moving without giving it some gas.
After reading the faults, the following keeps coming back:
- P0402 EGR-valve, positive deviation
- P0221 Throttle/position sensor; compliance between wire 1 and 2
(Those are translated to my best)
I have a spare Throttlebody which I've swapped with no effect. When opened I can't see anything wrong, but might not know what to look for.
The EGR valve "should" be clean, after haven got a "HyDrive" last year, which is cleaning out the exhaust system with hydrogen.
But to be sure I'm planning to remove it, and cleaning it with some EGR Cleaner. Is there a way to test it, to make sure it's opening and closing alright?
I'm having a bit of trouble with the car. This has been an ongoing issue for the last year or so. The car is fully driveable and such, but now that it has been colder, the issue starts to appear much more noticeable.
Model: 406 2.0HDI 110
Year: 2001
Motorcode: RHZ
Note: Fitted with a 1999 BSI and ECU
When driving the revs would randomly "spike" revving up and staying for 1-2 seconds before going low again. This could also be, that I removed my foot from the speeder, and the car would hold the revs without going back to normal before I slow down.
Now that it is cold it runs high idle around 1200-1300rpm going up and down a bit. When I do a cold start, it's also very easy to stall. This means I can't get the car moving without giving it some gas.
After reading the faults, the following keeps coming back:
- P0402 EGR-valve, positive deviation
- P0221 Throttle/position sensor; compliance between wire 1 and 2
(Those are translated to my best)
I have a spare Throttlebody which I've swapped with no effect. When opened I can't see anything wrong, but might not know what to look for.
The EGR valve "should" be clean, after haven got a "HyDrive" last year, which is cleaning out the exhaust system with hydrogen.
But to be sure I'm planning to remove it, and cleaning it with some EGR Cleaner. Is there a way to test it, to make sure it's opening and closing alright?