Close but yet so far......
Thread Starter
Teching In
Joined: Dec 2004
Posts: 15
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Close but yet so far...... Is there anyone in the oklahoma area that has completed an LS-1 project? I am in serious need of some advise. I posted about two weeks ago saying that, My 240ss is almost finished the problem is that the motor turns over but will not start. I have just about trouble shot everything. I guess my question is has anyone had this problem with there motor or does anyone know of a shop in the lawton, OKC, or north Texas area? Please help I wanna drive sometime in 2005 
VATS is the little resistor in the key, that is required to start the motor, unless it's disabled. if the VATS is keeping you from running the car, there should be NO SPARK.
i told you in the other thread, you need fuel, and spark, to run.
go old school man, pull a plug, plug it into the plug wire, hold the threads of the plug itself against the head to ground it, and fire it over to see if you have spark. if you do, then pull an injector out of the intake, and plug it into its respective plug. unplug all the others from the harness and give her a good turning over, check and see if it's squirting.
before you check the injectors, i would unscrew the cap on the end of driverside fuel rail and depress the schrader valve while someone cranks on it. if you get hosed with fuel, you have fuel pressure. do this before ANYTHING ELSE, because its the easiest thing to do.
make sure the engine compartment isnt covered in gasoline when you do the spark plug check or you could have a fire problem.
do this, then come back and tell us the result. if its rolling and rolling over, not even TRYING to start, then you have either a fuel, or a spark problem.
i told you in the other thread, you need fuel, and spark, to run.
go old school man, pull a plug, plug it into the plug wire, hold the threads of the plug itself against the head to ground it, and fire it over to see if you have spark. if you do, then pull an injector out of the intake, and plug it into its respective plug. unplug all the others from the harness and give her a good turning over, check and see if it's squirting.
before you check the injectors, i would unscrew the cap on the end of driverside fuel rail and depress the schrader valve while someone cranks on it. if you get hosed with fuel, you have fuel pressure. do this before ANYTHING ELSE, because its the easiest thing to do.
make sure the engine compartment isnt covered in gasoline when you do the spark plug check or you could have a fire problem.
do this, then come back and tell us the result. if its rolling and rolling over, not even TRYING to start, then you have either a fuel, or a spark problem.
TECH Senior Member
Joined: Apr 2004
Posts: 6,157
Likes: 1
From: Texas
Originally Posted by glennhl
Car should start even if there are emissions codes. However, it will not start if the VATS is not disabled.
Correct me if im wrong but if it was the VATS the motor would not turn over at all. Sounds like a fuel/spark problem
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Originally Posted by 2MuchRiceMakesMeSick
Correct me if im wrong but if it was the VATS the motor would not turn over at all. Sounds like a fuel/spark problem
If he went the simple route like I did, he just took the START output wire from the key switch and connected that to the LS1 harness starter solenoid wire.
No way VATS will prevent this setup from cranking...it just won't actually start.
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same thing that TheBlurLS1 said, but a couple tips:
1. have a extra spark plug handy and just connect that one. alot easier then pulling a plug.
2. buy or rent a Noid light from autozone... a noid light is a special light that plugs into the injector connection. every time the injector is pulsed, you should see the light flash instead. simple to check and you dont have to open the fuel system.
3. put a fuel pressure gauge on the system first. much safer then just spraying fuel everywhere, and you can check that the pressure is correct... not just that pressure is there.
1. have a extra spark plug handy and just connect that one. alot easier then pulling a plug.
2. buy or rent a Noid light from autozone... a noid light is a special light that plugs into the injector connection. every time the injector is pulsed, you should see the light flash instead. simple to check and you dont have to open the fuel system.
3. put a fuel pressure gauge on the system first. much safer then just spraying fuel everywhere, and you can check that the pressure is correct... not just that pressure is there.
Teching In
Joined: Mar 2002
Posts: 23
Likes: 0
From: East Quogue, NY
I had a hard time starting my 2000 LS1 the first time also. Same thing, would turn over but wouldn't start.
I bought my engine then it sat on the floor in my garage for about 2 1/2 years before I installed it. Anyway, it turns out that the injectors were gunked up from sitting so long. I had a friend tap on the injectors while I cranked it and eventually it coughed to life. Initially it ran rough, but it got much better once I put some fuel injector cleaner in the gas (Chevron Techron, iirc).
Your mileage may vary.
I bought my engine then it sat on the floor in my garage for about 2 1/2 years before I installed it. Anyway, it turns out that the injectors were gunked up from sitting so long. I had a friend tap on the injectors while I cranked it and eventually it coughed to life. Initially it ran rough, but it got much better once I put some fuel injector cleaner in the gas (Chevron Techron, iirc).
Your mileage may vary.
Thread Starter
Teching In
Joined: Dec 2004
Posts: 15
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Thanks guy's you really helped with this project, the car started yesterday(I love the sound of a strong V8) It was a wiring problem that I had. But I did try all of you guy's theory's (thankx Blur) The car is up and running now I will be posting pics soon. It is a 96' 240sx with a Silvia frontend conversion.(full carbonfiber) The motor is stock but mod are soon to come. One question: Does this sight has a gallery for us Hybrid guy's if not sounds like a good idea.(hint)
