can any one help me ive got a power issue betwwen 4000rpm and 6000rpm the engine strugels ive red a few topics on here about it, this is what ive done already new imrc new coil pack new leads new plugs new fuel filter new fuel pump and im still gettin the same problem any ideas cheers

 

anyone..........

 

does it jerk when you get to these rev ranges? mine hits a stone wall and wont go over around 4500-5000 revs

 

yeah at a lost end now and dont really wanna take it to a ford garage

 

does it do this coz its in idle mode anyone?

 

...............

 

At that point in the Revs and with no fault code it could mean your inlet manifold has stuck, have you checked that the IMRC is actually switching the runners in the inlet, its not uncommon for the cam to break off. With no fault code it sounds mechanical. If you pull on the cam on the end of the inlet you can feel and hear it move inside.

 

yeah i changed that for a new one,, checked it and can hear the flap openin and closing thats why im at a lost end grrrr

 

If the IMRC cam breaks you can hear the controller buzzing all the time through the bulkhead.

Have you tried disconnecting the exhaust in case a cat or silencer is blocked?

 

theres no buzzing through the bulk head,, ill try the exhaust tomoz cheers for that mate ill get back to ya if it still carrys on

 

no, exhaust system fine not blocked cat fine..... back to the drawing board any other ideas mate??

 

Mine has a flat spot @2500rpm.It just hiccups and is then fine,but this happens in every gear. Is this is what yours is doing? If so the ECU is cream crackered and either needs a map or a new one so I have been told.
J

 

any idea how mutch mate? and dunno its hard its like a stutterin, its fine till top end kicks in, induction side i think?

 

Thats COMPLETELY normal for the ST170, the ECU is fine its the rubbish map ford put on it. They all do that on a standard map

 

so were would i get a nonstandard map from

 

hi guys, ive got similar issues and im currently looking for a replacement fuel pump to see if this solves the issues, is it common for the ST170 ECU to cause similar hesitation issues?

Cheers

 

get it on the rolling road so you can see what its actually doing when its holding back.

 

Does anyone know where i can get a fuel pump from? the only one i can find is from ford and as you can imagine they think they're made out of diamonds...

BTW its a 03' Focus ST170

Ade

 

Demon tweeks. give them a ring you can get an uprated one much cheaper and straight swap. think its made by sytec or something

 

Yeah tried them they don't have one listed and nor does any supplier I've found, I got a sytec uprated from pumabuild buts its too tall for my sender unit

Ade

 

http://www.ebay.co.uk/itm/Ford-Focus...7#ht_500wt_949

Fleebay mate.My first ST had a shit pump and caused all sorts of trouble but I have had a new pump in this and I know its an ECU issue with mine.
J

 

SP3,where would I find a decent mapping garage?
J

 

Have you rang them and spoke to them, im almost cetain they do one and its not listed.
For a decent map i would look no further than Jamsport who can do you a live map or get a flash map from Dreamscience

 

Yeah called them twice and had same response that they cant find one listed and they even called they're stockists and they no longer supply them...

Think itll be an OEM replacement or a US SVT pump from across the pond.

 

Noob question but whats a flash and live map?
ta
J

Oh,and who's car is that in your avatar SP?
J

 

My avatar is a picture of the remains of my st170 after i rolled it 5 times at 85mph in august last year! Smashed my pelvis, ribs, arm, hand internal bleeding. nearly killed me!! a flash map is a generic map written for the st170 model and is uploaded to your ecu, a live map is written on a rolling road specifically for your car and is infinitely better than a flash map as engines are not generic they are all different

 

Dont no if it helps but my st170 had the same wouldnt rev changed loads in the end it was the throttle position sensor.

 

i done a oil change on the st170 that i picked up on sat morning... used ford filter and 4.3 litres of oil taking it to about 3mm over max on dipstick.... it was somewhere near there before i drained it too!
i have noticed ....more particularly tonight because i had the radio off in traffic that it sounds like a quite deisel on idle.... i actually thought it was the beetle tdi infront ...... i pulled over and check oil levels etc and could find nothing obvious the sound however is loudest near the cam pulleys..??? possible crank but unsure...

sounds same both cold and hot .... oil pressure never much bellow half way on guage and oil temp reads correctly used 5/30 comma oil

 

That is not a good looking ST and I could imagine you were the same too!

Thanks for the info.
J

 

Hmm ill fit the replacement pump and then ill try the TPS if this dont fix it (cant image they cost much)

Cheers

 

Such a shame as it was easily one of the best and cleanest examples out there every thing was brand new or uprated. never mind its only metal......scrap metal lol

 

Just a small update, looks like replacing the fuel pump has done the trick hello rev limiter!