Help please :(

[Mark_Petty]

My gf went to start the car today and it started fine but then cut out straight away. It would only stay on if you pressed the accelerator slightly.

I called the aa out and they started it fine and it idled fine, I drove off fine, came to a junction and put the car in 1st the revs seem to be a lot higher than normal.

I pulled over and put the car in neutral and it was reving iratically above 2k rpm.

Could this be the temp sensor? or is there an idle control valve?

Its for a mk1 172

Please help

Thanks

 

[Caramel]

or throttle body

 

[Mark_Petty]

cheers how much do you reckon that would cost to fix if it is that?

 

[Mark_Petty]

Anyone?? before it goes to a garage

 

[stu8v]

Clean the ISCV out with WD40 and check the temp sensor connections.

 

[Mark_Petty]

Clean the ISCV out with WD40 and check the temp sensor connections.

Cheers mate it was that. Much appreciated.

It works fine now

 

[MATT BLACK]

Replace the temp sensor - part number 7700101968 £23.49 + vat

This sensor acts as a choke - it is situated in the thermostat housing - when the vehicle is cold it senses the engine cooling fluid is cold so increases the fuel / air mixture to compensate - If this sensor is knackered it will be like trying to start a manually operated choke car without pulling the lever out - once the waters warm it should be ok

 

[Rob_Willow]

Sorry to steal your thread, but i have a similar problem with a 1.2 16v clio. When starting from cold, the revs are very low, and require accelarator revs to keep the engine from dying. It cuts out when you coast at low speeds or stop. Once the engine is at its normal operating temp which i think it 90oC, it is fine. Could this be the same problem? and if so where is my temp sensor located? Thanks in advance

 

[MATT BLACK]

eg

 

[Rob_Willow]

Thats a good pic j3ned. Is that the D4F engine?

 

[MATT BLACK]

lol - 172 lump ( F4R 736 )

 

[MATT BLACK]

Heres the D4F Type - 2 options depending on what type of thermostat you have fitted

 

[Rob_Willow]

thanking you...

 

[Dan@SJM]

wont be the throttle body

 

[Mark_Petty]

wont be the throttle body

It was the idle control valve jamming up. Which was causing the car to rev lots and lots. It was reving at 3000 rpm in netural lol
Or the valve would jam shut causing a low air intake which made the car stall

It just needed cleaning out.

So far its ok