declang123
New member
Hey everyone,
I’m having a bit of a nightmare with my 2015 Jaguar F-Type V6 (3.0L Supercharged), and I could really use some advice.
Background:
I recently changed the fuel injectors after a failure (rough idle, misfire cylinder 4 and 5 etc) and after the replacement, the car was running absolutely fine. Smooth idle, no issues, and I thought I was in the clear.
However, after giving it a bit of a thrashing (spirited driving, nothing too crazy), the car suddenly started dumping fuel like mad, producing thick white smoke from the exhaust. The smell of raw fuel was pretty intense.
What I’ve Checked/Done:
1. Fuel rail pressure seems OK (around 3110 kPa).
2. O2 sensor readings seem stuck at 1.28V, both pre and post cat.
3. No obvious fuel leaks from the rail or injectors.
4. Car actually idles OK (ish) if I unplug the crankshaft position sensor, but obviously, that’s not a proper fix.
5. Puddle under the exhaust smells strongly of fuel.
What Confuses Me:
Why did it seem to be running fine after the injector swap, only to break down after a bit of hard driving?
Could the new injectors be faulty, or is it more likely a sensor/ECU issue given the thrashing might have rattled something?
Is it possible that the excessive fuel is due to a faulty crank sensor or ECU failing to interpret signals properly?
Why would the O2 sensors be stuck at that voltage?
Any input or similar experiences would be really appreciated. I’m just trying to figure out whether I’m looking at a faulty sensor issue or if I somehow messed up the injector swap.
Thanks in advance!
Declan
I’m having a bit of a nightmare with my 2015 Jaguar F-Type V6 (3.0L Supercharged), and I could really use some advice.
Background:
I recently changed the fuel injectors after a failure (rough idle, misfire cylinder 4 and 5 etc) and after the replacement, the car was running absolutely fine. Smooth idle, no issues, and I thought I was in the clear.
However, after giving it a bit of a thrashing (spirited driving, nothing too crazy), the car suddenly started dumping fuel like mad, producing thick white smoke from the exhaust. The smell of raw fuel was pretty intense.
What I’ve Checked/Done:
1. Fuel rail pressure seems OK (around 3110 kPa).
2. O2 sensor readings seem stuck at 1.28V, both pre and post cat.
3. No obvious fuel leaks from the rail or injectors.
4. Car actually idles OK (ish) if I unplug the crankshaft position sensor, but obviously, that’s not a proper fix.
5. Puddle under the exhaust smells strongly of fuel.
What Confuses Me:
Why did it seem to be running fine after the injector swap, only to break down after a bit of hard driving?
Could the new injectors be faulty, or is it more likely a sensor/ECU issue given the thrashing might have rattled something?
Is it possible that the excessive fuel is due to a faulty crank sensor or ECU failing to interpret signals properly?
Why would the O2 sensors be stuck at that voltage?
Any input or similar experiences would be really appreciated. I’m just trying to figure out whether I’m looking at a faulty sensor issue or if I somehow messed up the injector swap.
Thanks in advance!
Declan
