Another Starting Problem

[disco1776]

When I start the discovery after letting it sit for about 2 hours or more, it always takes a while, about 3-4 seconds for it to turn over. But, one it gets started I can cut it off and it will start right back up. The fuel pump, fuel filter, and spark plugs have been replaced within the last 6 months. I have racked my brain and i'm lost. Ive searched and found something about replacing the fuel filter, but didn't solve this problem. Anyhelp would be appreciated. Thanks

 

[MtclimberVT]

CEL ON? Could be a bad sensor i.e. 02 or maybe ECTS or FTS. Good luck.

 

[Joey]

Could be the Fuel Temp Sensor, but it could also be a leaking injector....

You didn't state year, milage... or at least i didn't notice.

 

[PHARAOHDISCO]

I had the same symptoms on mine a while ago. Like Joey said, it was a leaking injector or it could also be more than one. One or more pistons are being flooded with fuel. However, if that is the case in your vehicle, once it starts you should be seeing black smoke from your exhaust pipe which goes away after a few seconds. If that is happening and it is being repeated each time you leave your vehicle sitting for a few hours, then it is most propably an injector problem.

 

[DiscoDave]

I would also go with the fuel theory....

Bleed your fuel filter (excuse my ignorance if you can't bleed it - you can with a diesel!)

Sounds like you're taking a while to get fuel through when the vehicle has been sat for a while. Air ingress somewhere? Is is done up tight enough?

 

[disco1776]

I do see the black smoke for a few seconds after start up. So im gonna go with the leaky fuel injector theory for the time being. Hope this fixes the problem. Thanks guys.

 

[Flashphoton]

Try this test

If you connect a fuel pressure gauge to the fuel rail and turn the key on then off, the fuel pressure maintains for quite a while, perhaps 15+ minutes. It would seem likely that if an injector is leaking the fuel pressure would drop quickly. I?m guessing quickly because fuel is incompressible, so removing just a tiny volume of fuel should immediately relax the pressure.

CD

 

[Flashphoton]

Here's something similar

From Chris-St Louis's post in a different thread, sounds like a pretty similar problem.

3) Loss of Initialization

Some vehicles may suffer from a symptom of stall immediately following a start. This symptom is more apparent on a hot restart but can occur under any start condition. This stall occurs because the I.A.C.V. pintle "creeps out" from its correct start position prior to starting. As this "creep out" occurs it restricts the volume of air flowing into the engine via the I.A.C.V. system. This leads to the rapid drop in engine speed/stall immediately following a start.

The I.A.C.V. always moves against it's spring to the fully retracted position on vehicle power down. This action leads to the possibility of "creep" occurring. The amount of "creep" that occurs is related directly to the internal mechanical resistance of the I.A.C.V. If a customer complains of the above symptom it is acceptable to remove the I.A.C.V. spring. DO NOT remove the spring if there is no customer complaint. Only a small number of vehicles exhibit this problem.