Air leak issue?
Discussion
Hi all, I am currently over fuelling which results in performance loss when accelerating sometimes.
When my inlet manifold blew up, I had this replaced, along with a faulty lamda sensor and a faulty temp sender. I then reset the adaptive map and I could see both lamdas working in unison and the hunting disappeared. All I'm left with is this performance issue.
My mechanic installed the new Bosch fuel pump (with upgraded loom) and replaced the fuel filter and he can still see over fuelling which suggests an air leak somewhere. The seating of the inlet manifold has been checked (three times using various methods and nothing of note).
I am hoping someone could shed light or point me to the info for the following:
Explanation or diagram of vacuum pipe layout.
Should there be a pipe attached to the fuel rail regulator?
Explanation or diagram describing sensors attached to the inlet manifold, which pipes go to which sensor and which sensor is which.
Many thanks for reading and for any replies.
EFA
When my inlet manifold blew up, I had this replaced, along with a faulty lamda sensor and a faulty temp sender. I then reset the adaptive map and I could see both lamdas working in unison and the hunting disappeared. All I'm left with is this performance issue.
My mechanic installed the new Bosch fuel pump (with upgraded loom) and replaced the fuel filter and he can still see over fuelling which suggests an air leak somewhere. The seating of the inlet manifold has been checked (three times using various methods and nothing of note).
I am hoping someone could shed light or point me to the info for the following:
Explanation or diagram of vacuum pipe layout.
Should there be a pipe attached to the fuel rail regulator?
Explanation or diagram describing sensors attached to the inlet manifold, which pipes go to which sensor and which sensor is which.
Many thanks for reading and for any replies.
EFA
Edited by leeshell on Monday 28th July 12:53
I have had compression tests performed on all cylinders and they are all within 5%.
The symptom is when you put your foot down (slow or quick) sometimes it dies and slows down then picks up.
My mechanic has inspected the fuel pump and says it is over fuelling. He had been talking to Trevor until he left the country.
But if you have another idea, it would be welcomed
The symptom is when you put your foot down (slow or quick) sometimes it dies and slows down then picks up.
My mechanic has inspected the fuel pump and says it is over fuelling. He had been talking to Trevor until he left the country.
But if you have another idea, it would be welcomed
gadgeroonie said:
i suggest you get it rolling roaded and check the fuelling in real time
where are you based in the country ?
I am based in Taunton - South West, I do have access to RR in Plymouth.where are you based in the country ?
What would a RR show please?
I have been a passenger with laptop driven down the road and not seen anything untoward.
leeshell said:
gadgeroonie said:
i suggest you get it rolling roaded and check the fuelling in real time
where are you based in the country ?
where are you based in the country ?
I am based in Taunton - South West, I do have access to RR in Plymouth.
What would a RR show please?
I have been a passenger with laptop driven down the road and not seen anything untoward.
RR will show the AFR's over the rev range, no good with just a Laptop unless you have a wideband in the Exhaust system someware.
Bondy
leeshell said:
gadgeroonie said:
i suggest you get it rolling roaded and check the fuelling in real time
where are you based in the country ?
where are you based in the country ?
I am based in Taunton - South West, I do have access to RR in Plymouth.
What would a RR show please?
I have been a passenger with laptop driven down the road and not seen anything untoward.
RR will show the AFR's over the rev range, no good with just a Laptop unless you have a wideband in the Exhaust system someware.
Bondy
Pants, did you say Trevor is out of the country? I've just sent him an email asking for advice re my car running rich. Any idea's when he's back??
Had my lamdas checked at the weekend and they were fine. Adaptive map showed the car was taking more fuel from the front bank than the rear.
James
Had my lamdas checked at the weekend and they were fine. Adaptive map showed the car was taking more fuel from the front bank than the rear.
James
this RR is in Plymouth, they have done a few nobles and are very experienced
http://enginetuner.co.uk/
http://enginetuner.co.uk/
Sorry I don't know when he's back. I believe he's hot testing.
Give Dave Jones a ring.... http://www.roush.co.uk/partsVehicleSales.htm
Give Dave Jones a ring.... http://www.roush.co.uk/partsVehicleSales.htm
leeshell said:
Sorry I don't know when he's back. I believe he's hot testing.
Give Dave Jones a ring.... http://www.roush.co.uk/partsVehicleSales.htm
no don't Trevor is on holiday this week, back next weekGive Dave Jones a ring.... http://www.roush.co.uk/partsVehicleSales.htm
NobleGuy said:
Fxwhisper said:
Have you tried new plugs and gapped them up properly? I find 30thou the best on a 3r, any more and it can hesitate.
A few people have had hesitations and they almost always trace back to coil/HT/plugs.
Maybe we need to discuss and agree a "how to diagnose you're misfire" on a seperate thread and then stick it on the Wiki?
Anyone want to get the thread started?
ps. I'm only the driver
--
Richard
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