My GPR is fubar and my truck starts right up with in 1-2 seconds of cranking. It idles a little rough for 10 seconds or so but not sure if its related to that or not.
Mine does this, but only for a second or two. I believe this is the time it takes to build full oil pressure, I believe...
Back to the thread subject, is there a difference, or consiquences?
There is a reason for everything.. Why not wait a few seconds? I would think it would be a matter of how long the truck has been sitting and the outside tempature.
In the summer time there is no reason to wait. The truck should fire up almost instantly even if you don't wait for the wts light to go out. Your glow plugs may stay on for a few minutes after the truck starts anyway depending on the temp.
Basically they are there to make the diesel warmer for initial start up and aren't really neccesarry for use if it is warm out at all. Alot of motors never even had them. It won't hurt not to wait.
Honestly I only wait for the Wait to start light on my first start up of the day, unless its really fn cold out. Not going to hurt anything in summer time.
If you dont wait for light to go out when its cooler out youll just have extended crank sessions. Your glow plugs stay on even after the light goes out and the engine is running.
I didnt know if not waiting would hurt the glow plugs or shorten there life. Some have said over time it could burn the tips of the glow plugs do to there heat combined with the heat from a running motor
Im a DYI guy not an engineer. Thought maybe somebody could clear it up.
It sounds like it dont do anything going by the responses. Thanks
Yes it can shorten the life, you could damage the glow plug solenoid as well, and they're aren't cheap like 70-100 Bucks. I had to change one on my buddys 7.3L
warm tempature days you don't really have to worry about it not starting. in the winter time you'd plug the block warmer in to compensate for the warmer temps for the glow plugs. You cant just keep letting it crank and crank because you will damage the starter. Diesels aren't spark ignition obviously. its all Fuel+Air nothing else.
That's what I was thinking Cleatus. Above 55º it does not matter, the relay does not fire anyway. The light don't mean crap, it means even less than your stock oil pressure guage.
you got it, its no more then a dummy light, just because it turns on doesn't mean the glow plugs work and just because it turns off doesn't mean the glow plugs turn off. its all eot and time related.
This is way too simple to be made so complicated.
The light comes on my truck EVERY time you turn the key to the on position. It will come on if the engine is fully warmed and at operating temperature.
It's controlled by the PCM and IIRC gets no feedback from the GP system.
The PCM monitors oil and ambient temperature and makes a decision whether or not to energize the GPR to light the glow plugs. They live inside the cylinder so they stay as hot as the inside of the cylinder as long as the engine is running. In cold weather they will stay energized after the engine starts until the PCM times them out.
So no, it ain't gonna hurt them IF they did come on momentarily in warm temperature. However, if for some reason.....malfunction.... they were to get energized and STAY energized it would probably kill the GPR in short order.
And if they stayed on after shutting the truck down, they would not be on for very long before you had two dead batteries. They are one of the main reasons we have two batteries.
Man this got way too complicated. I love my GPCM rather than the GPR system
Seems that the man purpose of GPs (in any diesel), which is merely to assist in starting during colder periods by warming the combustion chamber and ultimately assisting in igniting the fuel, was forgotten by some. The GPs or the solenoid could care less how short a time period they come on, too long of course is obvious as to what is going to happen.
You'd be surprised how close my GPs are to my injector nozzles in my VW IDI, their pretty much right next to the nozzle in the pre-combustion chamber. Again the point being they simply aid in igniting the fuel.
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