My 2000 Ls won't start.

[shorod]

Glad to hear you got it fixed. Thank you for following up with what you found! That's part of what makes these forums so useful.

-Rod

[nuckolsk]

Hello joegr and rod,
just did a vacuum repair the other day on my 2000 ls ( thanks for the diagrams rod ) , car cranked up and ran great except for running a little rough on idle. My son drove it for a couple of days and then started cutting out on him until it finally had to be towed back to the house. It will crank , start and then immediately shut down. Went back checked all connections and vacuum lines. Scratching head , since it has gas pressure enough to turn over but immediately cuts off.

[shorod]

Have you checked for any diagnostic codes that might indicate at least an area to start your search?

-Rod

[nuckolsk]

No, not yet , usually use the parts store diag. Tester but they wont let it off the lot. Guess will have to get one of my own now. Was just trying to go through process with out , this one is new to me so feeling a little stuck on process.

[nuckolsk]

Ok, got scanner , getting p1121 throttle position sensor inconsistent with maf sensor. , checked your post on this code , no leaks between maf and throttle body, tps connections and maf connections good.

[nuckolsk]

Messing around with things ,the battery went low so jumped and she started and ran for a little bit and then cut out again reread the codes and the same. So i'm not thinking pump is the problem.

[nuckolsk]

Ok , good news , took the throttle body and everything in front of it apart. Used maf cleaner and cleaned everything up. Reassembled and it started right up. Rod , i think your post on the code was correct on a air leak between was the main cause. The crankcase tube needs a little bit more of a push inward to completely seal it. At least it forced me to get my own scanner.

[shorod]

Hopefully that's the issue and it's not something more challenging to diagnose. I guess a bit of RTV or self-fusing silicone tape is in order to seal that tube up.

-Rod

[nuckolsk]

Thanks for all the input. Son was having problems as the weather turned to super cold from indian summer all of the sudden. I got the car started and told him to go to gas station and "fill" the tank up with high test but do not turn car off and then go to parts store for injector cleaner and drive it around and then come back to the house. Of course he puts a few dollars of regular at a time in the car and has since he has been driving it for a few years now. The attendent told him to cut the car off and he listened to him ? Could not start so on second day i put the tow strap on it and proceeded to go locomotive / cabuous less than a mile back to the house. Of course a officer drove by and handed me a nice ticket and forced me to get a tow truck to take the car a 1/4 mile ?? Go figure my luck !!! Anyway pump fuse blown, changed. No start. Dont have guage for pressure check so a little ether solved that problem. Changed filter , cant hurt since can not remember ever changing. No start. Checked current on plug pins as suggested above and have current to pump, so assuming relay good from other thread here. So im at pump. Called dealer , ha ! Roflmao from responce. Almost 500 bucks for new pump. Right! Here i go to pick and pull for a 20 buck pump.