hi my 01 l200 has 100000 miles on it now and just started giving me trouble the day my boy got his license(maybe its a sign lol).
it sometimes dies at a light or just when idling, I have to cycle the key a few times to restart it. works almost every time. it will also die if its in park and i rev it to the limiter, it will just die. no codes, new pump, now filter, new crank sensor. fuel pressure stays steady between 50-60 psi at all times when key is on even when it dies. I've swapped fuel relays around, cleaned the air idle control valve(that seemed to help at first) but it still seems to be functioning as when i turn the ac on the rpm goes up. checked fuel pressure regulator also. i was getting a small evap leak code before this started but a new fuel cap and it hasn't been back.

not sure what to check now, any ideas?

 

What does the security light do? Does it come on when you start it and then stay off? Hopefully no flashing. Is there any timing chain rattle at the belt end of the engine?

 

no security light, it lights up like everything else when i turn the key to the on position but goes right away, no other bcm issues that I have noticed either. no real chain noise as far as i can tell. i did read some stuff about the idle control valve possibly giving me the same issues, so i cleaned it since i couldnt get one same day and it seemed to help at first. after driving it for about 15 minutes i got home at started it several times and it was normal until i revved it to the limiter in park and it shut right off. it had sat for a few days before i tried starting it this morning, it took several times cycling the key to get it to fire, then several more times before it would stay running. at that point the rpms were around 1100 and the a/c had no effect on rpms. i also unplugged the ICV and no change. im going to order one today.

 

That sounds like a good plan. Don’t ever free rev an engine to the rev limiter if you like the car. With no load on the engine things tend to come apart.

 

Have you checked your fuel pump pressure?

 

no luck with the idle control valve. yeah i know lol but the damn thing is pissing me off.

 

pressure was between 50-60 at all times even as it shut down

 

That is rail pressure.

I think rube was talking about actual fuel pump pressure.

What is the spec for fuel pressure at the rail? And do you have the 2.4 or the V6?

 

no i only checked the port on the rail, i guess i assumed that if it had pressure there then the pump was working. also its the 4 cyl. the pump is new but that never means much honestly.

 

My bad. I thought 50 to 60 was way too high but that is about the spec for your engine. I thought too much pressure might be getting through the regulator but that does not seem to be the case.

Again, sorry about that