fiestaturbo.com

[FesterRS]

The car will feel faster when it is cold as the turbo runs better when cooler. This is why an Intercooler is a good mod to have as you will have full power even in the summer when the car runs hot a lot.<br>With regards to the problem, to be honest, i dont know but it definately isnt a coincidence that it happended after Mr Fixit in the garage messed with your motor.<br>I recently had a problem with my FRST holding back when the turbo cut in and i took it to Ford and they couldnt find any fault but it still kept happening. Power Engineering had it for 1 hour and its never happened again. <br>I would take the car to your nearest turbo specialist or even better someone like PE who are mainly Fords and get it sorted even though it might hurt your wallet. <br>If i need engine work done i take it to someone who genuinely knows what there doing such as PE as Mr know it all at tweek the fuel mixture garage will just make problems for you.

[Paul R]

I would also recomend Power+ engineering, they solved a boost problem I had instantly, where as other garages said " its the Turbo Mate, £700 please " plus you get a print out of your BHP and any other probs solved.<br>Paul R

[Dazzler]

Can any body share their knowledge with a problem I have?<br><br>Fiesta RST 1991 165bhp chip.<br>When I first got the car it was fantastic, very fast, very powerfull. It was like this until I took it for a MOT to my local garage, (big mistake - "What's this turbo business then, eh lad?"), it failed on emmissions and he adjusted it to pass.<br>After a short while it started to mis-fire on full boost and it always seemed to be running very hot - it never 'boiled over' and never shed it's water but it smelt very hot like the smell you get when an engine as overheated. (Still running lean because of the MOT.) I thought it was the head gasket on it's way out so I changed it, and did everything else I could do while the head was off. Didn't cure it (I was gutted) the misfire got worse and worse until any amount of boost would bring it on and then one day it dropped 2 cyclinders.<br>I managed to get it to a 'Specialist' garage who immediatly thought it was the 'brain' from the sound the car was making. Anyway, to cut a long story short the 2 inner spark plugs were breaking down under pressure and heat caused by the lean mixture (the 2 inner cylinders run hotter anyway but with the mixture wrong, temperature went through the roof). The 2 inner plugs finally gave up the ghost. Mixture adjusted to what it should be (won't pass MOT though) and a new set of spark plugs cured it. But that's not the end.<br>Once running properly I noticed that the car wasn't as fast and it seemed like boost was down. I spoke to TurboSystems who modified the car and they said to put a boost gauge on and find out exactly what's happening.<br>This I did and the boost was down - 8psi. The man at TS said for a 165bhp chip the boost should be about 13psi. <br>I adjusted the actuator right up to the end of the threads and the boost is nearly back to what it was. It is now about 11psi. But it has moved up the rev range, positive pressure used to start at about 2000 rpm, now it is nearer 3000. With the actuator wound right up there is not a lot of movement on the waste gate.<br>What my query is (eventually), has the turbo or turbo blades been damaged by the lean mixture and excessive heat and would this explain the loss of boost and the boost moving up the rev. range?<br>I thought it may be the blades as the turbo dosen't 'cheep' between gear changes anymore but before all this it used to 'cheep' like a bird. When the engine (and turbo) is cold it seems more powerful than normal operating temperature. Any help?