I've recently bought a 1.4(16v) Elegance, with low mileage. Cylinder 1 has just shut down (Not ECU or wiring) believed to be a sticking valve.

After 2 engine flushes i'm now getting different warning codes:

P0106 & P0170. The fuel trim is way out +25% to -17%. The engine thinks the outside air temperature is 30 degrees...

Have cleaned out the throttle body. Any other suggestions would be gratefully received.

Edited 24 March, 200917 yr by Mcwigan

Alright, your fault codes are;

P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

P0170 Fuel Trim Malfunction (Bank 1)

By looking at these codes, i would try a new Manifold Absolute Pressure unit. But i would also try getting one from a scrappies before shelling out £100 quid for one.

How have you determined cylinder 1 is at fault?

Thanks for your feedback.

I'll look into the Manifold absolute pressure unit (sounds expensive). Is this a common fault on Fabias? Or am I just unlucky?

As for Cylinder 1, the initial ECU faults were misfire's on cylinder 1. The spark plug on cylinder 1 was working but the injector wasn't which led us to believe it was ECU or wiring.

since then we think the problem was a sticking valve as compression was so low for cylinder 1 and I believe this prompted the ECU to shut it down.

2 engine flushes later and the compression is rising again but still lower then the others.

It's only been after the engine flushes that the other warning codes have appeared...