427 with 1 Probelm...wont start HELP!
If it is not the battery (you tried a known good battery, right?) and not the connections from the battery to the starter or the engine to ground, the only thing left is the starter itself. When you connect a battery charger, you have serious current available to run the starter and everything else.
Make sure that there is a solid connection from battery negative to the engine.
If it is not the battery (you tried a known good battery, right?) and not the connections from the battery to the starter or the engine to ground, the only thing left is the starter itself. When you connect a battery charger, you have serious current available to run the starter and everything else.
If it is not the battery (you tried a known good battery, right?) and not the connections from the battery to the starter or the engine to ground, the only thing left is the starter itself. When you connect a battery charger, you have serious current available to run the starter and everything else.
Have you checked the supply voltage to the pcm and injector fuses while cranking from one battery?
Check all your connections including the grounds and try it again.
Something is causing you not to fire the plugs and/or the injectors when the starter is activated by one battery (known to be good). The only reason I can think of is that the starter current draw is excessive and not enough is left for the injectors and/or ignition.
Have you checked the supply voltage to the pcm and injector fuses while cranking from one battery?
Check all your connections including the grounds and try it again.
Have you checked the supply voltage to the pcm and injector fuses while cranking from one battery?
Check all your connections including the grounds and try it again.
Find the power supply to the ECM (be careful here...make sure you have the correct circuit(s) and check the voltage while cranking. You must use a digital volt meter. You can disconnect the harness from the PCM and check the voltage while cranking, or you can pierce the wire into the ECM and check while cranking. (I hate that method...but not a lot of choices there if you don't have a Break Out Box.) To be honest, I'm don't have this circuit committed to memory, but there should be a relay involved in powering the ECM. If so, that could be your issue. Some voltage checks on these circuits should get you the answers you are looking for.
First, like OldCobraGuy said, make sure you are using a digital voltmeter. Check your fuse box to see if power for any of the items you need to check passes through it. Some fuses have places on the top (where the amp rating is) where the terminals come through the plastic. If they are there, that is the place to check voltages. You may have to also look for in-line fuses that are not in the fuse box.
Also, like OldCobraGuy said, there is a relay in the circuitry somewhere. I am not familiar with that part of the circuit either.
Hope you find the problem.
Also, like OldCobraGuy said, there is a relay in the circuitry somewhere. I am not familiar with that part of the circuit either.
Hope you find the problem.
First, like OldCobraGuy said, make sure you are using a digital voltmeter. Check your fuse box to see if power for any of the items you need to check passes through it. Some fuses have places on the top (where the amp rating is) where the terminals come through the plastic. If they are there, that is the place to check voltages. You may have to also look for in-line fuses that are not in the fuse box.
Also, like OldCobraGuy said, there is a relay in the circuitry somewhere. I am not familiar with that part of the circuit either.
Hope you find the problem.
Also, like OldCobraGuy said, there is a relay in the circuitry somewhere. I am not familiar with that part of the circuit either.
Hope you find the problem.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Sounds like a bad battery. You will never know if you don't take it to get tested, its FREE. If it is cranking, but dropping that much in voltage, its probably dropping a lot in amperage too (which is what starts the car). Your engine is probably not cranking over fast enough to start it, so go get the battery tested.
Update sorry guys just now getting aroumd to looking into my non starting issues. Well I had battery tested and battery is good. Checked all fuses and relays and all is good. So my next step would be? im off tommorow so im hoping to figure out in the next 24hrs. fingers crossed.
So it's turning over just not starting? What timing cover and harness are you using. I remember reading that there you have to swap two wires around when using a LS2 timing cover. Unfortunately that's all I remember about it. Maybe this will get you pointed in the right direction.
Yea it turns over. I don't think the timing cover is it &it reason being it has always started until recently. I have fuel I have compressing its like it doesn't get spark. But if I hook up a start box or jump it it starts.
no. Here is what im lost on. The car started and ran great went and got it tuned and everything was great. about a week later this none starting issue started. At first i thought it was b/c of the tune spoke with my tuner and not a tuning issue. Then I relized my fuel pump went out so i replaced that and still nothing. it cranks over just wont start unless it has an extra kick(like a starter box or jump) ???
Sounds like a bad battery. You will never know if you don't take it to get tested, its FREE. If it is cranking, but dropping that much in voltage, its probably dropping a lot in amperage too (which is what starts the car). Your engine is probably not cranking over fast enough to start it, so go get the battery tested.
alright more info. I just checked the following. battery - to engine(checked out) all connections at the battery are good. I guess tomorrows goal will b to get the starter off and have it tested. any other todo's for tomorrow??