Hi everyone,

I've come to seek your wisdom once again. My LR3 has been sitting for a while due to some suspension issues. The other day, I decided to run the LR3 (in place) for a bit to move around it's fluids and keep the engine seasoned. Prior to this, I hadn't turned on the car in about 2 weeks. After about 5 minutes of running and after the car had heated up (thermostat opened and normal operating engine temp), I decided to give it a little throttle before shutting it off. I revved the engine to roughly 2,000 rpm for about 10 seconds and when I release the gas pedal, the car died (engine shut off). I thought that was odd so I cranked it again just to check if the LR3 still turned on. I started it with no problem, let it sit for about a minute (and it ran perfectly fine), revved to 2,000 rpm for about 10 seconds again, and when I released, the car died again. I let it sit overnight without trying anything more. The next day, I turned it on, let it get to normal operating temperature, revved the engine to 2,000 rpm, pushed on the gas pedal, but this time, for only 5 seconds, and when I released, the needle dropped to just about 0 and the engine *sounded* like it was just about to die, but didn't and then rpm bumped up to a regular idle range. I thought, OK...maybe she was just a little "rusty." That was 3 days ago. Today, I did the routine (bring to normal operating temp, etc.), and pushed on the gas pedal to 2,000 rpm for 10 seconds and the the engine died again. Twice. Like I mentioned, when I turn it on and while it's running...everything sounds and seems fine...it just dies when I release the gas pedal. I am a little low on gas (not empty) and the check engine light is NOT illuminated. Not sure if this has anything to do with it. Also, to clarify, this is all being done in a stationary position and revving the LR3 in neutral. Any suggestions or comments? Once again, I appreciate any and all feedback.

Thanks!!!!!

 

Why not take it for a spin?? Maybe to the gas station.

 

I would but my compressor "died." I have moved it up and down my drive way for various reasons and that alone causes it to "bounce" at the slightest bump. I am planning to pick up some gas in a can, but as I had mentioned, the gas tank is not empty...just low. Could that be a probable reason for my issue though?

 

Low gas? I don't think so...

 

No, that behavior sounds like something else going on. Mine seems to be developing this problem as well. Fully warmed up, in park, if I rev it up, I've had it stall once or twice when I release the gas. A couple other times it has almost died. It doesn't do it anywhere near as consistently as yours yet.

Throttle body has been cleaned, MAF has been cleaned. Spark plugs have been changed. Starts right up and drives OK otherwise.

 

thermostat?....

 

A bit of Googling and forum surfing says that vacuum leaks and bad O2 sensors might cause this behavior.

 

houm_wa, my thermostat was changed within the past six months and it "seems" to be working fine. djkronik57, I am also wondering if this might have something to do with the fuel pump? I'll be changing out my suspension soon so I'll be able to drive it, around the block at least, and see if this makes any difference. Thanks for the replies!!!!!

 

It could be fuel pump related, but usually if that's the case it'll die when you rev it, or at least stumble, since the fuel pump can't maintain flow. It'll sometimes cause starting issues as well.

Stalling after higher revs seems to indicate the ECU thinks the engine is in a different state than it actually is in (richer/leaner) and essentially starves the engine of air or fuel (if it's electronic/sensor related, if not it could always be something like a sticky throttle plate).

Try cleaning your throttle body as well if you haven't done that in a while. Usually a dirty throttle will present as a stall or stumble right after start up on cold starts, but worth ruling it out.

 

If it's an 05' there is a schrader valve on the fuel rail to test fuel pressure. If it's 06' or later, no luck.