Technical Lack of power

[tinnion87]

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)

 

[CinquePunto]

sounds like lambda to me, could be wrong though

 

[tinnion87]

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?

 

[CinquePunto]

have you tried a bottle of injector cleaner (redex or similar)?

 

[tinnion87]

Yeah about 4 lol

Reset the ECU. Just running rough.

 

[tinnion87]

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?

 

[DanGil]

It sounds like your ecu goes into 'limp home mode'.

 

[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.

 

[tinnion87]

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?

It sounds like your ecu goes into 'limp home mode'.

How do I get it 'out' of this mode

 

[DanGil]

Get the fault code and go from there.

 

[Randomman]

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

 

[sporting chap]

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.

 

[karbineftw]

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