Set the scene, car was perfectly fine (mk1 golf with polo engine), but thought it was a good idea to give it a service, as it was an unknown quantity.
decided to change the belts, plugs, leads, oil, filter and thermostat, water pump and coolant.
also changed the disca and pads (which i've had no problems with)
now the problem...
after swapping all the service items (was unable to swap the water pump), running the engine up to temp, turns out the new thermostat was faulty and didn't open. luckily we noticed, and shut the engine off before it got too hot.
swapped the thermostats back over, adn did it again. fan came on, temp steadied, all was well.
tightened everything up etc, then took it for a spin and then it happened. car lost power, was hesitating, and not revving, then eventually cut out. It would start, but would not stay idling.
Managed to crawl back to the garage, and back onto the ramp to see what's what.
we thought it was the new parts, so swapped them all back over. and the problem still remained.
thought it may have been the timing, but it wasn't
it was getting a spark, so that wasn't the problem.
after reading on here about similar problems, checked and swapped the blue temp sensor over, and it improved slightly, but then we noticed that the problem was still there. we established that the sensor was in fact fine, and the engine runs fine when it's cold, but when it gets hotter, something is telling it to put less fuel in.
it runs ok when the sensor is connected and is out in the air, but is probably overfuelling?
so as a bodge, the old sensor is plugging the hole, and the new sensor is cable tied to the top radiator hose. and the car runs as normal. although on longer journeys (when the engine bay temp is higher) it starts misbehaving slightly again. so we have moved the sensor to a cooler part of the bay.
after it being "fine"/driveable yesterday, wasn't so much today at motorway speeds and temperatures
Sorry for the huge essay (ended up longer than expected), but if anybody can shed some light, it would be greatly appreciated.
Cheers, Jon
decided to change the belts, plugs, leads, oil, filter and thermostat, water pump and coolant.
also changed the disca and pads (which i've had no problems with)
now the problem...
after swapping all the service items (was unable to swap the water pump), running the engine up to temp, turns out the new thermostat was faulty and didn't open. luckily we noticed, and shut the engine off before it got too hot.
swapped the thermostats back over, adn did it again. fan came on, temp steadied, all was well.
tightened everything up etc, then took it for a spin and then it happened. car lost power, was hesitating, and not revving, then eventually cut out. It would start, but would not stay idling.
Managed to crawl back to the garage, and back onto the ramp to see what's what.
we thought it was the new parts, so swapped them all back over. and the problem still remained.
thought it may have been the timing, but it wasn't
it was getting a spark, so that wasn't the problem.
after reading on here about similar problems, checked and swapped the blue temp sensor over, and it improved slightly, but then we noticed that the problem was still there. we established that the sensor was in fact fine, and the engine runs fine when it's cold, but when it gets hotter, something is telling it to put less fuel in.
it runs ok when the sensor is connected and is out in the air, but is probably overfuelling?
so as a bodge, the old sensor is plugging the hole, and the new sensor is cable tied to the top radiator hose. and the car runs as normal. although on longer journeys (when the engine bay temp is higher) it starts misbehaving slightly again. so we have moved the sensor to a cooler part of the bay.
after it being "fine"/driveable yesterday, wasn't so much today at motorway speeds and temperatures
Sorry for the huge essay (ended up longer than expected), but if anybody can shed some light, it would be greatly appreciated.
Cheers, Jon
