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Discussion Starter #1
Right my mates 147 GTa is been a tw*t

Engine warning light on all the time. Rad fan running all the time. Miss fire on cylinder 4.

Changed everything. Coil, leads, plugs, injectors, ECU, temp sensor, MAF and still it does it.

Local alfa 'specialist' has it and they are saying the cam belt may have jumped sodding the timing up.

TBH i don't thing this is right, its runs fine bar the small missfire and the sodding warning lights.

Anyone got any ideas.
 

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Right my mates 147 GTa is been a tw*t

Engine warning light on all the time. Rad fan running all the time. Miss fire on cylinder 4.

Changed everything. Coil, leads, plugs, injectors, ECU, temp sensor, MAF and still it does it.

Local alfa 'specialist' has it and they are saying the cam belt may have jumped sodding the timing up.

TBH i don't thing this is right, its runs fine bar the small missfire and the sodding warning lights.

Anyone got any ideas.
Did you also change the thermostat ? Faulty thermostat can also cause error light and continuously running fans...
 

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Get a diagnostic test done first of all to see what the engine light is on for, that'll be a start. Should tell you what the prob could be :confused:
 

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Hi - nice car btw !

My motor control failure and missfire was caused by a faulty o2 sensor on the rear bank. The specialist doesnt sound that special tbh ! Why has he replaced all the expensive stuff first ???
 

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What leads are you talking about? The engine wiring loom?
 

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Discussion Starter #8
Just to clarify. Its had all the coils swapped with ones which are working, its had a new thermostat, new part engine loom. New 02 sensors.

The fans seem to have stopped now. Its just stuck with a bad misfire on what the diagnostics says is number 4 but i bet its one 2,4,6.
 
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At least number 4 is on the front bank of cylinders. If the misfire can be heard at idle, you might be able to pin it down by removing the electrical connection to the No. 4 injector and noting any change (or lack of). You could also try swapping just the No. 4 coil-on-plug for another one but it looks like you may already have tried this type of approach.
 

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Discussion Starter #10
Yeah. Swapped the injectors and the coils with ones off another working engine.

I'm starting to warm to the thinking that the belt has been tentioned incorrectly (using a 3.0 locking tool) and its slipped a tooth on the inlet cam.
 

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Yeah. Swapped the injectors and the coils with ones off another working engine.

I'm starting to warm to the thinking that the belt has been tentioned incorrectly (using a 3.0 locking tool) and its slipped a tooth on the inlet cam.
Is this what the specialist has said? I'd be inclined to go with their diagnosis that the timing is out...
 

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Discussion Starter #12
They said the timing may be out...

I've looked through the service history and the cam belt wasn't done at alfa so i bet its been tentioned wrong like a lot of them have.
 

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Have a compression test done on the cylinders, may be bent valves due to incorrect belt timing. Happened to mine when the agents couldn't even get the timing right with the proper tools :mad:
 
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