To Somone that Knows...!
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To Somone that Knows...! Ok so I have just recently installed an LS6 ported oil pump, double roller timing chain, and MS3 cam. Well I accidentally put the drivers side spacer on the oil pump in wrong/backwards and didn't realize it...started it up and it started fine, ran fine...but then i discovered i had no oil pressure so I then tore it back down, fixed the spacer issue putting it where its supposed to be,...throwing everything back together and then starting it up. Well here comes the problem. It started up just fine and within 3-4 seconds I had oil pressure, thats when it DIED and would not start back up. I have no clue what would cause my engine to not like oil pressure...and start up without it and then not start up with it. Since then i have replaced the battery w/ a brand new one, fuel pump kicks in fine, spark plugs are getting spark. The car just sits and cranks over and every now and then it will hesitate and act like its gonna fire, more so when i let it sit for awhile. PLEASE HELP ME SOMEONE!!
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Yep, Dot to Dot. Thats just it...it ran perfect when i started it up and had no oil pressure, but when i fixed that problem and got oil pressure is when it died.
possible injector problem? REally sounded like a bad coil but you said everyting was getting spark. Did you ever try to give it a little gas while trying to start it? Bad fuel filter? Blown fuse somewhere? Just little things Im throwing out to check.
After thinking about it, make sure that all your plug wires are tightly on everything. They click twice going on the coil and click once while going on the plug. Just double check that.
After thinking about it, make sure that all your plug wires are tightly on everything. They click twice going on the coil and click once while going on the plug. Just double check that.
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Yeah everythings been definitely made sure its in, And yeah im getting spark ..i've checked two plugs and they spark perfect. And yeah i've tried giving it some gas while trying to start it...still nothing. I checked all the fuses underneath the hood and they are all perfect, i've yet to check the ones in the dash, I will do that a little later when i go home, im hoping for all the possibilities it can be and want a simple fix but im beginning to think thats not gonna be the case although it should. I dont know that the fuel filter would kill it after already being started and then it just happen to die right when i get oil pressure but i'll check it if i've got to come down to it.
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no they're not dripping or anything, they smell like gas, but nothing extravagant. And no i have not done a compression test just yet, will more than likely attempt that later tonight.
I dont mean to beat a dead horse, but it just seems like a spark problem. I know you said you checked two of the plugs for spark, but I would check all 8 of them. You can also check compression on all your cylinders when you do that too. Did you order your cam with any advance or retard on it?
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put it to the floor everything your saying sounds like it is flooded or somehow you've comprimised/messed with the internal crank trigger on the back of the crank. Not likely though. I would just hold it (the gas pedal) to the floor, (to keep injectors from pulsing) and crank while pedal is to floor. This will clear the cylinders and will allow the engine to fire. Leave pedal to floor until the engine starts to fire and then let off. good luck, flatsix.
I would pull all the plugs out and let it sit overnight and let the fuel evaporate out of the cylinders....then reinstall plugs and try again.
Did you unhook the ground strap down by the alternator that goes over to the body? This could cause it to not start.
Are the injectors pulsing? Do you have any noid lights?
Did you unhook the ground strap down by the alternator that goes over to the body? This could cause it to not start.
Are the injectors pulsing? Do you have any noid lights?
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Unfortunately no i do not have any Noid lights, and as far as i know the injectors are pulsing or it wouldn't have ran just fine for the time i had it going w/o oil pressure. and I took the plugs out last night, bought new ones and let it sit over night and put the new ones in today and tried and still just cranked and cranked. I have not fooled w/ anything on the alternator so i dont know about that...i'll check it out.
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Originally Posted by flatsix
everything your saying sounds like it is flooded or somehow you've comprimised/messed with the internal crank trigger on the back of the crank. Not likely though. I would just hold it (the gas pedal) to the floor, (to keep injectors from pulsing) and crank while pedal is to floor. This will clear the cylinders and will allow the engine to fire. Leave pedal to floor until the engine starts to fire and then let off. good luck, flatsix.
It ran fine until you took it back apart and put it back together...which means you must start from scratch when diagnosing. You musy have done something causing it to not start. "Assuming" that something is not wrong will come back to bite you in the ***. Start with the basics like you already have...check spark, fuel pressure, & injector pulse. Triple check all the fuses for injectors, coils, and PCM.
Engines only need 4 things to start...spark, fuel, compression, and timing. You are obviously not getting one of those. Start narrowing them down.
And you said you are 100% sure you got the cam gears dot-to-dot during the second install?
Engines only need 4 things to start...spark, fuel, compression, and timing. You are obviously not getting one of those. Start narrowing them down.
And you said you are 100% sure you got the cam gears dot-to-dot during the second install?
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I DID NOT mess with the cam gears/timing chain setup on the second install,...at all. And nor did i mess with any of the injectors, rails, coilpacks, spark plugs/wires...nothing on the second install. It started up after the 2nd install was done just like it had been starting u w/ no oil pressure...then when the guage rose with oil pressure is when it shut down and would not start up again.
What Im saying is you are missing one of those 4 components to let the engine run. It doesnt matter that you never touched the fuel rails or injectors or anything, something isnt working.
Do the checks and find out which component is missing that will not allow it to start. Is there plenty of gas in the tank?
Do the checks and find out which component is missing that will not allow it to start. Is there plenty of gas in the tank?
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Yes, plenty of gas. The only thing that it can be would be that When I got oil pressure,...it made the lifters throw the cam off time,...which to me seems highly unlikely but i guess it had to happen because it was in perfect sync running w/o oil pressure.
OK well like I said, do the basic checks to find out what we are missing, then once you find out what you are missing, you can continue diagnosis from there. Check fuel pressure, injector pulse, and spark (all 8 plugs).
A cheap way to make a noid light is to get a small automotive bulb and install the prongs into the injector plug and have someone crank the engine and watch the bulb. If it flashes during cranking, you have injector pulse. You could also use a test light for this.
A cheap way to make a noid light is to get a small automotive bulb and install the prongs into the injector plug and have someone crank the engine and watch the bulb. If it flashes during cranking, you have injector pulse. You could also use a test light for this.
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Definitely will give that a shot w/ the noid light situation to check the injectors. And I will see what i can do to get a fuel pressure tester,..and i'll check the other 4-6 plugs I haven't checked for spark but as far as i know they're all functioning fine. what is the likelihood of it dumping too much fuel and/or fouling off plugs constantly without ever actually turning over and staying fired?