THE ENGINE TURN ON AND I US IT FOR HALF AN HOUR AND THEN I HAVE TROUBLE TO START IT.I CRANKS THE ENGINE 7 TO 10 TIME AND THEN IT WILL START. BUT . DOS THE GLOW PLUG GO ON EVERY TIME YOU TURN ON THE IGNITION.
Yes it does. Let the glow plugs warm up for 7-10 seconds (the light on the panel should go off) and then crank the engine. If the weather is cold, half an hour of running does not warm up the engine completely so you need to use the plugs for the first few startups during a cold day.
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white sort of smoke when cold and trying to start ,well dont panic and pull engine apart i think you just need new glow plugs thats all ,when its really cold just spray a squirt of easy start ether spray into the air intake whilst someone cranks engine and if it starts straight away then you know you need new glow plugs or the timer relay isnt working ,their is nothing wrong with the engine its just the fact that the glow plugs are down to one out of the four working if not all of them are dead and what you seeing is unburnt fuel as vapour .This is normal what you are seeing if the heater glow plugs are not working as after 40yrs i have seen this quite a lot especially with ricardo type cylinder heads (indirect injection) but you do get it with direct injection as well if the compression is down or the fuel has gelled up but you need temperatures of at least 10c below for this to happen unless the fuel has a antifreeze additive or half a gallon petrol to a tank of diesel will do the same antifreeze trick.
I don't believe any VW sent to the US in the past 15+ years has come with a plug-in heater. The only exception is if the car was from Canada, or if one was installed afterwards.
If the engine turns too slowly to start, try cleaning the terminals of the battery, if still nothing- replace the battery.
If the engine turns over but just won't fire up cycle the glow plugs a few times before trying to start. Turn the key to on, wait for the glow plug light to go out after a few seconds then turn the key off. Repeat 2 or 3 times before you try to start.
Also make sure you use a fuel additive for the cold months. Look for something with anti-gel on the label.
this is a common problem for these cars glow plugs go bad like spark plugs however the smoke would lead to bad mass airflow meter. it is not telling ecu corrcet miss. disconnect mass airflow meter. when cold see if this makes it start better. it should would means you need new m.a.f. glow plug issue take a test light place clamp on positive of battery then pull off glow plug connectors place tip of test light on glow plug the bad one will have a dull light unlike the good one which will be brighter. will need new plugs and wire harness four **** connectors and wire striper and crimper will fix concern good luck
Have the cold start valve replaced, it enriches the fuel mix during cold start and check the glow plugs and see if any are bad, to test remove the wires and put test meter to ohms and one by one test each glow plug with one probe to ground and one on the tip of the glow plug see it it goes close to zero if it does not move then that glow plug is bad, replace all that you find bad.
I am assuming this a cold weather only issue ?? Turn your key to on before cranking it over for about 5 sec to let the glow plug heat up a moment. Not allowing the glow plug to warm will wear out your starter.