2003 Vauxhall corsa 1.2 petrol won't go above 30mph

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22 Apr 2005
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Yorkshire
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United Kingdom
Hi my sons 2003 corsa 1.2 petrol feels like it's running on 3 cylinders no power at all ,changed coil pack but still same new plugs too up hill is about 15mph on flat lucky if it gets up to 30mph,feels a bit splutterry too when excererating ,it's quite high mileage at but up til now been running ok ,engine warning light showing on dash too
 
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then i would say its gone into limp mode.

get the codes read either by buying a obd lead,download some software for your car and using a lappy read the fault codes on your ecu.

or spend a fortune at the dealers.

but the codes will need clearing.
 
Ok cheers never heard of limp mode until.now, Is there anything you can think of to check before, I take it to local garage, someone says egr valve might be clogged, not a clue myself
 
The maf sensors fail commonly on these and cause that kind of issue, you can disconnect it and generally the car should run better which proves its cream crackered.
Its located on or near the main black plastic air filter housing, if you need help locating it post up a picture of the engine bay.
 
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Does it free Rev OK when hot up to the red line? If not could be blocked exhaust. Drop down pipe and see if it runs better.

Also check breather pipes around the valve cover and manifold. Are they all still in good condition and attached?

What was the condition of the plugs when you changed them?
 
These engines are a bit of a pig. The chains tend to go slack and they end up sounding like a diesel when hot.

Mother in laws had an oil pressure issue where the pressure relief valve piston had started sticking in its bore. So low oil pressure isn't an impossibility, but it doesn't immediately explain the lack of power.
 
Much louder than diesel ,taken it to a garage to sort out ,engine is worn out ,has lasted over 100000 though
 
This problem is usually the Coil Pack, the EGR Valve (Exhaust Gas Recirculation) especially on the Twinport engines, the ECT Sensor (Engine Coolant Temperature) or the MAF Sensors (Mass Air Flow).
Unfortunately all 4 of these can throw up similar fault codes and usually means having to illuminated the ones that are OK.
Two other possibilities but rarer are a cracked exhaust manifold or the collapse of the inside of the catalytic convertor.

**My Mk5 Astra 1.6 has just started the exact same symptoms !
 
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