OK I give up

[62Sunbeam]

So I checked the new distributor and Rotor, The new Spark plug wires and even replaced the spark plugs themselves even though they also were new.(perfect beige coloration) I Seafoamed everything except the tranny (followed the directions to a T). Checked to make sure there was spark on all cylinders. (All tests conducted when Hot)

So then I surmized that it must be a fuel pressure issue so I replaced the fuel filter to no effect so then I got a fuel pressure guage and hooked it up to the fuel rail. Guess what: I have and maintain almost 25lb of pressure when the truck is hot and turned off, (it actaully climbed to almost 40 after sitting for ten minutes. But still no start. It finally after a few minutes It did start right up and I get about 35lbs of pressure.

So I'm confused. I've got spark, and fuel pressure. Do injectors fail to work when hot ( This makes no sense considering where they're located.) Is there a injector control module that might be getting hot and ceasing to function? (if so how do I test it) Should I set the car on fire and collect the insurance money (just Kidding)

Is there a test to see if there is a signal going to the injector??

For the back story here goes: Car starts rough if at all when hot and runs rough till it smoothes out after a minute or two. Runs great when cold and once it's up and running it runs great for hours at a time. Sometimes a little sluggish going up a long hill when hot.

By the way I would like to say for the record that the Factory manual is the biggest waste of trees since god-only-know-what.

Any and all info appreciated.


Eric
95 Disco

 

[disco1]

The symptoms you describe could be caused by a faulty fuel temperature sensor. This can result in the engine (when it's hot), getting too much, or not enough fuel, producing either a poor start, or no start at all. You will find the sensor located in the fuel rail on the right hand side of the ram housing.
Let's know how you make out.

 

[Sergei]

Eric, do you have nasty rich smell, after its been sitting for a while and then started?

 

[62Sunbeam]

It acts the same with the fuel temp sensor disconnected and connected so I have to figure it's not the sensor. I would think it would have to be sometning else as the sensor it self makes no real difference connected or disconnected other than the 14 error code.

I don't think it's excessively rich when it starts either when hot or cold but I'll double check.
I also have to check the plugs when it won't start to see if they're wet or fouled.

Thanks

Eric

 

[Discosid]

Eric I had something like this. The engine just cut out for no reason.
Check the plugs like you said when cold to see if they are wet. If you find them dry your not getting fuel.
This could be the Injector not getting signal to fire from the ECU. I Bit the bullet and replaced my ECU with used unit from a 96 and so far the problem has stayed away (Touch wood)
Also I don’t know how cold it gets where you are. But the ECU chip was changed on latter models providing it with better cold weather software Package. The old chip caused the engine to flood etc.
Check these site’s out on the LR ECU. Unfortunately this can only be done in England so the next time I’m back I’m going get my other ECU tested and fixed or dumped.
Ring them if you have to and ask questions, they will help.
http://www.bba-reman.com/
http://www.injectorcleaning.com/index.html
http://www.foreignecurepair.com/
http://www.carelect.demon.co.uk/rrind.html
http://www.carelect.demon.co.uk/rr396.html

 

[AaronATX]

probably a stupid suggestion, but have you checked for vacuum leaks?