Ford Fiesta 1.4tdci 2007 140k miles. low power, speed decreases to approx 20mph uphill in any gear. revs dip at about 1800rpm like kangaroo gas. Injector seals & service done but the problem still exists. Any idea? Ta
It sounds like the EGR valve is stuck open....this allows exhaust gas back into the engine to be burnt again - and its a plague on most diesels.
Easy to get to on this engine, anyway!
John
Thanks for the quick reply, I've ordered a blanking plate to test this. Would you recommend I drill a hole in it to stop the light coming up on the dash?
Not yet, lets just see what it does! Another idea - if it isn't the EGR - is to run the car with the exhaust off before looking at the MAF sensor or the turbo.
Yours has the sort of mileage where the EGR needs attention though.
John
Blanking plate fitted & the problem still exists. Since fitting there is much more white smoke coming from the exhaust on start up. The hesitation does seem to be gone/less but still low on power.
There's always a bit of oil in there, but not so much as it drips out.....its the smoke issue that spooks me.
Can you disconnect the pipes to the intercooler just to see whats in there?
John
The ones directly into the intercooler behind the bumper if you can get to them......just to see how much oil has collected there.
Back to the turbo.....can you pop the pipe off and spin the vanes? They should spin fine. Also look for any pipes missing from the turbo actuator, on the side.
After this, I think you need to get the fuel pump pressure checked at the common rail, and then the turbo boost pressure. Has the car had new fuel and air filters recently?
John
Yes, I did a service last week to try and correct the problem. Ok will try in the morning.
I've spun the vanes but needed a screwdriver as they were quite stiff. A little oil in the pipe that came off that.
They should spin freely with a finger mate......not like a kids windmill, but with minimal resistance. Look carefully for any scratching where the vanes may have been touching the turbo body.
John