My A4 2.8 is struggling to hot start...
Discussion
It's perfect from cold, fires up straight away. When it's warm and I leave it for just a few minutes it catches but doesn't make more than a couple of revs before cutting out. I can then either turn it on the motor for about 20 seconds and it slowly starts to fire, after which the throttle is very jerky and a blip sees a delay of about 1.5 secs before revving the engine. Or leaving it for a couple of minutes longer seems to help and it will fire up with more ease.
When running either hot or cold, it has started to hesitate if I prod the gas to get a burst of power at low to mid revs. It's okay at higher revs, but high revs tend to mask fuelling issues.
At a recent service I was told of weak signals from the lambdas, which could explain the hesitation when rolling, but I'd think that the lambdas had little to do when starting up.
I have new lambdas to fit, which I'll do, but does anyone have any ideas before I take it to have it's electronic mind read?
ta.
When running either hot or cold, it has started to hesitate if I prod the gas to get a burst of power at low to mid revs. It's okay at higher revs, but high revs tend to mask fuelling issues.
At a recent service I was told of weak signals from the lambdas, which could explain the hesitation when rolling, but I'd think that the lambdas had little to do when starting up.
I have new lambdas to fit, which I'll do, but does anyone have any ideas before I take it to have it's electronic mind read?
ta.
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