Same as it ever
Join Date: Sep 2008
Location: Czech Republic
County: Hlavní město Praha
Re: hesitant engine
Thanks for the advice SpeakerDocktor
.....OK, here is an update.
I drove to work this morning, temperatures about +10, and the 'hesitation' was at the higher end of the revolutions in 4th and 5th, but not 1st and 2nd (I didn't succeed in going through the rev range to see how 3rd was affected). The journey lasted 35 minutes, adn as usual the hesitation improved incrementally as time passed. This is the normal way things go with the car.... :-(
However, I drove the return journey 1 hour later, and there was no hesitation at any point in any gear!
So, perhaps the engine being warm helps, but also perhaps, this might give one of you 'gifted' people an idea of what I should check first....
Does this still point to lambda probe, fuel mix, ECU temperature sensor or fuel pressure?
A further point is that the engine temp on a normal run, takes about 10 minutes to get to just above 50 degrees, and unless in slow traffic, rarely gets above the next marker on the gauge (is that 70 Degrees?). However, when in a queue it will reach 90 Degrees, and the fan does cut in and keep it there. This is a P1, so I understand that the car does run at lower temps than a P2, so I wasn't concerned about this.
I'm no technician (not on cars anyway - give me an aeroplane and I'll fix it - I have a mental block when it comes to ground-based vehicles) but what would cause an intermittent fault like this? HT Leads, spark plugs? Or, do I still need to look at SpeakerDocktor's suggestions above?