This has done my head in if anyone can solve my problem id de very happy,my car is a 2001 1.8 zetec petrol the problem is when the wheather is hot and i put the car underd load ie drive up hill it pinks its head off and reduced power ,only happens when hot wheather ,this is what has been done so far ,haed off and checked new gasket etc ,mew maf ,crank sensor ,cam sensor, timing belt and pulleys ,oxy censor ,cht censor is woking fine ,cooling system is ok all been checked ,and the correct oil 5w30 and finally new plugs and leads ,oh forgot one more thing a new tps fitted as well ,

 

last one i knew of doing this was caused by the oil control rings stuck to the piston causing it to burn a bit of oil (wasnt even really visible as smoke from the back) this caused the tops of the pistons to carbon up really badly which made it pink, eventually it burnt the tips of 3 valves

 

Thanks ,but head has not long been off ,and even at 80k odd miles when it came off tops of pistons and valves were not bad ,ive had this prob since i bought it at 67k miles

 

Been timed correctly? Only other thing I can think of that you haven't tried is a new ECU really.

 

Coil pack.

 

thats what i thought the timing ,but ive checked and doubled checked ,i forgot to say i fitted a new coil pack as well ,when i firrst had the car i sent the ecu to be checked (all car electronics ) cost me 60 squid ,came back ok ,im at the point to just live with it .

 

Fuel filter or fuel pump not giving enough pressure under load?

 

have u tried super unleaded to see if it still does it

 

Thanks everyone for your help ,pani k i checked the fuel pressure with a gauge that connects to the end of the fuel rail ,it was fine and i changed the fillter as a matter of course ,ashcossie funny you say about the fuel because it only became noticeable again after filling with supermarket fuel ,filled up with super unleaded with tectron yesterday and its gone but the weather is cooler ,so ill keep to the same petrol until the next hot day and see ,ill let you know fingers crossed ,whats the differance between supermarket fuel and texaco etc

 

got a 2005 1.6 focus last of the mk1 mine as well pinks only done 88k its doing my head in i think ford as not lined the timming marks up its got to be timming could be half a tooth out from the camms were you lock of the cranck