99greenwagon

iTrader: (39)

hi my old dears car is being a t**t,its a 98 1.4 16v zetec and the idle starting going up and down,so i replaced the plugs,a new idle valve,and cleaned throttle body,the revs do stay steady now but miles to high,start the car and it idles at around 1500rpm hot or cold and revs can climb to 2.5-3k,if u dip the clutch the revs drop to 1300 ish then climbs back to 2.5 ish,it drives itself,really enoying and i dont want to tell her to replace this,replace that cause its costing a fortune,anyone know of this problem? i know it aint no scooby but would be great to get some help on this!thanks in advance

nick172sport

iTrader: (6)

does it have a maf fitted if so try changing it does this a lot on escorts also if its got a lamba sensor might be that only used to escorts but thats the main causes on them

andyxros

i know water temp sensors can cause this not very costly to replace ether, its sending a cold signal to ecu all the time wether hot or cold...obviously it wants it when cold a little for choke etc but when it warms up its supposed to send a diffrent signal to ecu to close bypass valve in throttle body and bring revs down wen hot

99greenwagon

iTrader: (39)

thanks guys,i replaced the maf with one from a breaker but it was a 1.25 zetec and im not convinced its the same,car seemed to develope a flat spot under acceleration so i stuck the old one back on for now,its a bit awkward to know wether to keep replacing sensors etc or get it on the diagnostic machine,she has very little money at mo and was hoping for a quick fix,bit unsure what to do next!

99greenwagon

iTrader: (39)

it seems this could be a common fault with them and are so called believed to be unfixable which does baffle me slightly!

nick172sport

iTrader: (6)

maf sensor wont be the same defo

99greenwagon

iTrader: (39)

thanks for that mate,try getting some cheap sensors next then?could it be tps?

Daz2000

iTrader: (1)

I'd say it was the engine management temp sensor m8.....had a few in work doin the same...From memory its under the plastic cover by the spark plugs....

99greenwagon

iTrader: (39)

excellent guys thanks,it would be a great help with a pic of underbonnet sensor locations,if anyone got one or can get one so i know where all these sensors are located?

lee rb5

in the middle of the inlet manifold is a breather hose with a t peice in the middle of it, what u will more than likely find is that eaither the pipe has collapsed or even more common is that its split.

99greenwagon

iTrader: (39)

pics???? please help an old dear! thanks if i can get a pic of sensor location i can have a tinker with them and also check that t piece/pipe

kingmikeyuk

my wifes old car had exactly same symptoms , in the end i got rid of it as it would start to accelerate when you were trying to slow down, found out after its a well known problem with fords throttle body assemble, the garage i traded it in at had to replace it , after that they said it was ok, if i can i will try and find out exactly what the problem was .

99greenwagon

iTrader: (39)

yeah that would be great,ive been reading on fiesta forums about it and lots of people havent found a cure,so it would be ideal if u could find out,thanks alot.

kingmikeyuk

sorry , but they have gone out of business, i can only suggest you ask a non ford dealership, an independent garage, as they might by more honest about admitting its a known problem,

99greenwagon

iTrader: (39)

thanks anyway,at the moment i have a list of about 10 bloody things that it could be and better still i am with the understanding that i still might not be able to cure it even if i replace all the parts that it could be,sounds like a right nightmare and expensive to find out!