Rough running engine
Discussion
Hi Folks,
Only just managed to get home.
Whilst on a run, engine started misfiring, not just one or two but all cylinders stopped firing very briefly. Then back to running fine again.
This happened about once a minute to start with but the intervals started getting shorter then just like really rough running. Ran into a long traffic jam which was a nightmare. Had to brake with heel and keep throttle pressed with toe to stop it stalling. Revs jumping between near stall and around 2500rpm as it ran then cut out repeatedly.
Sometimes wouldn't idle and then other times fine.
Gradually getting worse and worse. By time I reached home, really rough running.
Shut down then turned ignition ON, got the fuel pump whine and click off then a longer wheezing/buzzing noise from the fuel tank area. Opened the fuel cap and got a big rush of air. Think it was expelling air rather than drawing it in but could be wrong.
What causes the tank to pressurise? Is it related to the carbon can in the front wing?
After expelling the air, the engine seems to run better but I also fiddled around in the passenger footwell as I think I have a poor ECU connection somewhere so that could have resolved it. Can tank pressure cause really rough running?
Only just managed to get home.
Whilst on a run, engine started misfiring, not just one or two but all cylinders stopped firing very briefly. Then back to running fine again.
This happened about once a minute to start with but the intervals started getting shorter then just like really rough running. Ran into a long traffic jam which was a nightmare. Had to brake with heel and keep throttle pressed with toe to stop it stalling. Revs jumping between near stall and around 2500rpm as it ran then cut out repeatedly.
Sometimes wouldn't idle and then other times fine.
Gradually getting worse and worse. By time I reached home, really rough running.
Shut down then turned ignition ON, got the fuel pump whine and click off then a longer wheezing/buzzing noise from the fuel tank area. Opened the fuel cap and got a big rush of air. Think it was expelling air rather than drawing it in but could be wrong.
What causes the tank to pressurise? Is it related to the carbon can in the front wing?
After expelling the air, the engine seems to run better but I also fiddled around in the passenger footwell as I think I have a poor ECU connection somewhere so that could have resolved it. Can tank pressure cause really rough running?
Edited by taylormj4 on Wednesday 8th April 18:41
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