Help needed- lost power, misfiring - Alfa Romeo Forum
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(Post Link) post #1 of 5 Old 24-09-08 Thread Starter
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Help Help needed- lost power, misfiring

A couple of weeks ago I replaced the cambelt, balancer belt and auxilliary and all seemed fine. One morning on the way to work last week though the car gave a short misfire lasting about a second or less and the MCSF light came on and instantly went off again. The car continued on as if nothing had happened and was running fine.
I was out last night and about 2 or 3 miles from home the same misfire occurred except this this time it it didn't stop. The MSCF light came on and continued to flash on and off at a frequency of about once a second. The car limped on at very reduced power obviously misfiring, until I came to a hill about 1/2 a mile from home when I slowed for the junction There just wasn't enough power and it stopped with a cloud white vapour from the exhaust that seemed to be partly burnt fuel by the smell of it, which won't have done the cat any good. The car now won't start but only fires sporadically and stops. I had to get my wife out to help me tow the car home - a new experience for her.

Tonight I read off these error codes;
P0300, P0301, P0302, P0303 and P0304 - Random misfiring on cylinders 1,2,3 and 4 - No surprise there.
Also P1670 - Electronic feedback signal not present

Now the fault may or may not be connected to the earlier belt change but given the fact that it previously occurred for a very short period I'm inclined to think it is caused by an electrical rather than mechanical fault but that may be just wishful thinking. Any ideas what the P1670 code means and where I should start looking?
I'm fearful this could be very expensive.
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Re: Help needed- lost power, misfiring

The cambelt might have jumped a tooth, if it hasn't been tensioned correctly.. This would cause a whole load of problems like what you describe.
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Re: Help needed- lost power, misfiring

I did consider that but I was careful to tension it properly and why would it "hiccup" briefly and then run fine for nearly a week? Of course that could have been caused by something else altogether.
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Re: Help needed- lost power, misfiring

I had a multiple cylinder misfire on the rear bank of my V6. Problem was diagnosed as a incorrectly fitted cambelt. The previous cambelt change was bodged by the garage. The timing had been knocked out by half a tooth when cylinder 1 was at TDC. Took a specialist 5 hours to get the engine sweet again!!! The specialist thought the camshafts had not been locked in place using the special camlocks.
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Help Re: Help needed- lost power, misfiring

Hi all, I have this morning had an error come up: motore control error and when checked it's P0302 error - cylinder 2 misfire. Any ideas what should I do? We haven't done any work recetly like discribed above.
We have checked all plugs for oil/water and nothing, error still comes up...
I need to go to work tomorrow and I don't know what to do...
Help please!!!
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