Over heating Again

[spoofer]

just driven her a few miles for the MOT which she failed on joy.

but the engine. the temp gauge up down, running very cold while driving, but heat building up when stood..

is this a broken stat.

[Nightfire]

just driven her a few miles for the MOT which she failed on joy.

but the engine. the temp gauge up down, running very cold while driving, but heat building up when stood..

is this a broken stat.

Thermostat either stuck open or not fitted

[spoofer]

its it snot fiited, will show ive been ripped off on teh head,

will i risk snapping bolts if i try to remove the stat myself

[spoofer]

aswell as being very cold last night with no heater,

the car stopped rand out of electricity, alternator doesnt apear to be that tight

[spoofer]

just having a better look,

ive got fresh oil leaking from the rocker cover gasket. odw the head into the alternator

[spoofer]

thermostat now replaced, , old one had holes poked in it

but why didnt they change it whne the car first went in

[spoofer]

all running fine now, just couple of things..

on stone cold starts the engine cranks over & over then fires, runs slow picks up and runs fine. i dont recall this from my last mr2.

2nd is when warm idle spead is 1100rpm

[Rogue]

Most like causes, either - Idle Stability Control (ISC) valve is not operating or your EFI water temperature sensor is faulty.

Kennym's post about the Puma also reminded me that you must make sure that the temperature is set to full hot before you bleed the coolant through.

[spoofer]

Idle Stability Control (ISC)

is thise sencer the unit wit the green plug to the side of the throttle body

[ashley]

Yep, I've highlighted the relevant column in the fault finding guide for you (this is for the rev3+ engines)

[spoofer]

tmany thanks

the block connector to this unit has been chopped and spades replacing it, bad connection im hoping. looks bit of a pin to replace unit