ON COLD START UP IN MORNING ENGINE CRANKS BUT NO START. PUT IN NEAUTRAL AND ROLL CAR BACK A FEW FEET AND GET BACK IN AND STARTS EVERYTIME.....1998 GP 3.8L, NON SUPERCHARGED. SOMETIMES STALLS ONCE STARTED WITHIN 1ST 5-10 MINS BUT RESARTS WHEN CRANKED.
Have local auto parts store check the battery, it may have a couple bad cells, which would reduce cranking amps... would still have enough to run lights etc., but just not enough juice to start the car...
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Most common reason for no start cold with a lack of fuel is the fuel pump relay or the check valve in the pump. The fuel line should have some pressure it it after sitting overnight. If not, the check valve in the pump may have let fuel flow back into the tank. It would take a few minutes of cranking to get it started. Also, if the fuel pump relay is not working, the pump would not get power until the engine has oil pressure.
VAG suffer greatly with a signal failure to ECU that brings the choke on when cold. Your fault is text book of this.
Follow the top radiator hose to where it meet the engine, at that point you will see a sensor, it has 4 wires and is held in by a horseshoe clip. This is the water coolant sensor, replace it and you'll be happy again :o)
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.
It could be a faulty Engine Coolant Temperature sensor. It sounds like when it is cold, your computer is interpreting your signal from the ECT
(or lack therof) as being at a certain temperature and not providing the right amount of fuel in order to start the engine when it is cold. Does the check engine light blink or flash at all?
OK, so starting the engine uses a lot of battery power, and the engine needs to be left running a while to recharge the battery.
When it is cold batterys don't hold as much charge (not quite the correct technical term, but I don't want to go into battery mechanics and chemistry here). You either need to pop it on a trickle charger or let it run for at least 15 minutes.
this is a battry problem you can charge the battery long a nuff to start after motor is running but you have a dead seal i would recommend wall mart best price and warrenty if you replace the battery with there 2 yr warrenty with-in the 2 yrs you will never hafe to but a nother battery for the life of the vehicle////// if this is not your problem i would say your coil pack is cracked