What caused this?
Discussion
On Sunday after the Saturday track day I was cruising round the M25 when I noticed that the car could be provoked in to pinking much more easily than usual. If it pinks when accelerating under 2000 revs then I can be fairly sure it's overheating or perhaps I've put the wrong fuel in. However it was showing 80 on the temp gauge, and it seemed to happen above 2000 as well. As I pulled off to get on the A3 I changed down planted the accelerator and it almost died. I dipped the clutch and then the engine raced! So I hit the kill button and pulled over.
Any guesses what caused this? As it happens my friend 'Zorba the Greek' was right behind me and he called it straight away once I'd explained what happened.
Any guesses what caused this? As it happens my friend 'Zorba the Greek' was right behind me and he called it straight away once I'd explained what happened.
Edited by ukkid35 on Monday 9th March 09:03
Easily induced Det is typically caused by low RON fuel, lean mixture, over advanced ignition for charge state, high coolant or air temperatures.
As the last couple are unlikely and 95 is the lowest you can get at the forecourt in the UK,I'd say your down to lean mix of wrong ignition, possibly a slipped throttle pot?
As the last couple are unlikely and 95 is the lowest you can get at the forecourt in the UK,I'd say your down to lean mix of wrong ignition, possibly a slipped throttle pot?
gruffalo said:
Paul, and anyone else for that matter I just thought I would let you know that it looks like a few of us are meeting up at the ACE Cafe this evening from about 7 onwards if any more Cerbera owners can make it?
Would love to join you but doubt I could make it until about 9pm due to other commitments, probably too late by then this early in the year.My friend immediately suggested throttle cable, and he was close. The passenger side throttle arm had fallen off the spindle (probably because I'd forgotten to use thread-lock on the grub-screw). So I'd been driving about 25 miles around the M25 with one throttle completely closed (because of the spring on the TPS), and the drivers side alone controlling speed. When I came off the M25 and changed down, opening the throttle significantly it bogged horribly, and when I came off the throttle and dipped the clutch the engine raced because the link was stuck holding the drivers side throttle open.
I always carry my tools with me every time I go out in the Cerb, except this time I had completely unloaded the car because I was dropping it off for some work. 'Zorba the Greek' had a pocket multi-tool thing that helped a lot, but I really needed an Allen key, fortunately we found a recovery agent who was kind enough to lend me one.
I always carry my tools with me every time I go out in the Cerb, except this time I had completely unloaded the car because I was dropping it off for some work. 'Zorba the Greek' had a pocket multi-tool thing that helped a lot, but I really needed an Allen key, fortunately we found a recovery agent who was kind enough to lend me one.
ukkid35 said:
My friend immediately suggested throttle cable, and he was close. The passenger side throttle arm had fallen off the spindle (probably because I'd forgotten to use thread-lock on the grub-screw). So I'd been driving about 25 miles around the M25 with one throttle completely closed (because of the spring on the TPS), and the drivers side alone controlling speed. When I came off the M25 and changed down, opening the throttle significantly it bogged horribly, and when I came off the throttle and dipped the clutch the engine raced because the link was stuck holding the drivers side throttle open.
Hmmm, with a different ECU would it be possible to shut one bank down when cruising to get better fuel consumption like some of the modern engines? That only really works with full vvt and the ability to hold valves shut to prevent compression and through-flow. You don't want to pump air into the exhaust or it'll just send the lambdas crazy, so in theory, an ajp could have one entire bank switched off bit it'd be like, well, driving on only half the cylinders.
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