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Old 15-03-2006   #1
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Lack of power

My car seems to be lacking power and the engine juddering on acceleration.

It seems to me like its underfuelling. Any ideas what may cause this?

Injector light displays when cold, and restricts engine revs at about 3.5k. When warmed up its ok, and only comes on very occasionally

It has an enlarged TB fitted, and a cat-back supersprint (on a 55)
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Old 15-03-2006   #2
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Re: Lack of power

sounds like lambda to me, could be wrong though
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Old 15-03-2006   #3
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Re: Lack of power

Well had a new downpipe fitted today, so lambda came out

Cheers I will try and get it on a diag. machine

Any other ideas?
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Old 15-03-2006   #4
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Re: Lack of power

have you tried a bottle of injector cleaner (redex or similar)?
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Old 15-03-2006   #5
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Re: Lack of power

Yeah about 4 lol

Reset the ECU. Just running rough.
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Old 21-03-2006   #6
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Re: Lack of power

Ok.

Changed TB back to original, so to me that counts out any associated problems

Also changed the lambda today, but still running rough

Can anyone suggest anything else?
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Old 22-03-2006   #7
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Re: Lack of power

It sounds like your ecu goes into 'limp home mode'.
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Old 22-03-2006   #8
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Re: Lack of power

Sounds like the coolant temp sensor on the inlet manifold. Try putting a new one in, they are cheap and go wrong all the time.
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Old 22-03-2006   #9
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Re: Lack of power

Quote Originally Posted by richcinq
Sounds like the coolant temp sensor on the inlet manifold. Try putting a new one in, they are cheap and go wrong all the time.
Where can I get one?
Quote Originally Posted by DanGil
It sounds like your ecu goes into 'limp home mode'.
How do I get it 'out' of this mode
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Old 22-03-2006   #10
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Re: Lack of power

Get the fault code and go from there.
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Old 22-03-2006   #11
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Re: Lack of power

Long shot I know, but when I changed to a larger TB on my Cinque it went rough (turned out to be an extra hole i hadnt accounted for) but for some reason when I changed back it was still rough for about 100 miles, then went back to normal.

If that doesnt happen then what people have said about the sensors is dead on
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Old 19-09-2009   #12
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Re: Lack of power

Hi, I have a similar problem . Look under the bonnet at night and see if the leads or more likely a coil shorting . The spark can be very subltle and only visible at night.You may hear a clicking noise too.
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Old 19-09-2009   #13
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Re: Lack of power

Quote Originally Posted by sporting chap View Post
Hi, I have a similar problem . Look under the bonnet at night and see if the leads or more likely a coil shorting . The spark can be very subltle and only visible at night.You may hear a clicking noise too.
over 3 years late with the reply... lol
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