Adam23

hey people, am new to this site ,as this will be my first post lol, my gf has a fiesta mk4 1.3 and its got a funny problem with the heaters, when the car is stationary on tick over the heaters are hardly hot they only slight warm but still bit chilly, but when she drives a long the heaters work fine ?? just wonderign if anyone could shed any light on what this could be??

also shes got a weird problem every time the car goes into 4th? the car sort of judders and feels like its holding back? every other gear is ok apart from that?

the car has started a hunting noise when stationary like its starving for air once the car is revved and clutched it makes the hunting noise? jus twondered if that could be a problem in the 4th gear issue? also just wondered if anyone knows why it could be hunting for revs ? cheers Adam

martysmartie

iTrader: (1)

I would say a dicky thermostat, look at the temperature gauge next time your out, if it reads low this will be your problem, I am assuming by this the blower is working?

I don't think it is, but the idle issue may be related, as the engine isn't getting up to it's optimum temperature, the ECU will be getting told so accordingly, therefore trying to raise the engine speed etc, I know the connector has also been known to 'get knocked off' the clutch pedal switch, but I am not sure if your model would have one, it may be the later models?

Could also be a sticking ISCV.

If it is the stat I would first replace this and see how you get on.

Martin

Adam23

hey thanks martin, um i think the needle does sit under half iirc , may be worth me putting a new thermostat in to rule out if its the thermostat or not as there not to expensive to replace, yeah heater blower does work, seems very powerful so that works, just when stationary its cold/slight warm and when driving its nice and hot, which is hard when her car ices up and it keeps misting up lol, if i was to get under the dash and look at the pedals will i be able to see if the switch is on properly? i remember once i knocked my switch out abit on my brake pedal on my saxo and that left the brake on constent lol, ?thanks for your help much appreciated will replace the thermostat on weekend Thanks Adam

ahh also i forgot to mention is the ISCV the idle control valve?
thanks again

Churtz

Heater problems are almost certain to be heater control valve. I imagine it's not opening all the way, but when the revs are higher the coolant flows enough to squeeze adequate water into the matrix. Super common failure on these.

Matt

st3v3

heater control valve for the heating problems you'll find it on the bulk head,got a pic somewhere.

As for the hunting it could be the idle speed control valve (ISCV) or possibly look below the intake pipes at the front of the engine and you will see a T-piece with rubber pipes connected,make sure non of these are split as this would give the same symptoms.

Adam23

ahhh sweet thanks for the reply, i did have alook at the t-piece you just mentioned and i can hear a slight sucking in noise but couldnt notifie where it was coming from, i sprayed wd40 all over the pipes too see if it made it anymore easier to hear or see the noise but couldnt find any thing dont suppose you could post a picture up off the heater control valve and the ISCV so i can see if i can get those sorted? thanks for you help mate

thanks matt im hoping to see if someone can post a picture up so i can see if i can change this if its easier enough as you described does sound about right for the car, as when stood still its warm and when car is driving the engine is working more faster which will force more water threw, thanks mate

st3v3

you can just see the two pipes from it, if you replace the HCV make sure you get the same one as some have different internal diameter sizes

martysmartie

iTrader: (1)

Although a common problem, I doubt it's this in this case as the heat output changes with the motion of the car, plus the OP states car is never reaching running temperature!

Martin

st3v3

Just under half way for the temp needle is running temp on these.