Stupid questions about motorised conveyances
Posted: Tue Aug 31, 2021 7:03 pm
I know we have a thread called SFQ in the lentil cave, but thought maybe a vehicle only one would be useful as some people might not venture in there.
I have a question about horrible modern diesels.
As reported on another thread, my 57 plate Nissan X Fail T31 won't rev above 3000rpm and has thrown up a P0488 code "EGR throttle control circuit A range/performance".
When I removed the EGR valve for cleaning, it had clearly had a bad case of the shits.
This may have been as a result of me trying to clean it with Wynn's egr cleaner, but surely brown gunge should not be anywhere near the inlet manifold?
After cleaning and refitting, the lack of revs and fault code remain.
Disconnecting the plug to the egr seems to have 'cured' the 3000 rpm limit and the P0488 code.
Here comes the question...Does this mean the egr is fubar?
I'm struggling to understand the cause and symptoms.
I'm assuming the egr remains closed at start up and low revs, then gets a signal to open allowing exhaust gases to enter the inlet manifold. Could a non-functioning egr result in a signal to limit the revs to 3k and would disconnecting it prevent this signal? Will it remain closed when disconnected?
Don't all laugh at once, but I think this engine is shared with a diesel Laguna. It's the M9R 150PS job.
I have a question about horrible modern diesels.
As reported on another thread, my 57 plate Nissan X Fail T31 won't rev above 3000rpm and has thrown up a P0488 code "EGR throttle control circuit A range/performance".
When I removed the EGR valve for cleaning, it had clearly had a bad case of the shits.
- IMG_1764.JPG (901.31 KiB) Viewed 9612 times
After cleaning and refitting, the lack of revs and fault code remain.
Disconnecting the plug to the egr seems to have 'cured' the 3000 rpm limit and the P0488 code.
Here comes the question...Does this mean the egr is fubar?
I'm struggling to understand the cause and symptoms.
I'm assuming the egr remains closed at start up and low revs, then gets a signal to open allowing exhaust gases to enter the inlet manifold. Could a non-functioning egr result in a signal to limit the revs to 3k and would disconnecting it prevent this signal? Will it remain closed when disconnected?
Don't all laugh at once, but I think this engine is shared with a diesel Laguna. It's the M9R 150PS job.