i went and bought a 07 SS/SC and brought it home and i bought it as a not running car so when i got home i checked the compression and was 175 psi per cylinder and then i checked the plugs and coils and cylinder 2 is the only one firing and i even swapped the coil from cylinder 2 and tried it on other cylinders and they still wont fire so i know its not the coils ..they are all good..im just stumped on what to do ..only code its bringing up is P0315 crankshaft sensor not learnt to ecu but with that code it should still run..any help please..

 

Compression is good, spark is good, so it has to be ECU or fuel. If you can, go ahead and do a crank re-learn just to rule that out. Other option is swap the cyl. 2 injector and see what happens.

 

that is kinda low compression it should be more around 200

 

no, as long as they are all close it's ok. a lot of SC's are around 180-190 anyways.

Have you checked the injectors? are all cylinders getting fuel?

 

better hope ur cyl wall is not messed up

 

yea the cylinders are getting fuel..you can see it shoot up out of the cylinders when i crank it over without the plugs in it..and when i pull the plugs after cranking it over u can see the fuel on the plugs,.

 

sounds like fom the code the timing may be off or hopefully just the cps sensor

 

bump for him it sounds like an easy fix... any aftermarkey equip on iT? are u saying that it gets no spark in any of the other 3 cylinders?

 

reluctor wheel could be bent... probably not but never know.

 

This may sound dumb but check you ECM fuse, mine blew because my ******* friend hooked my interceptor up to it and the car shut off and would start but only on one cylinder. Found that it was blown and put a new one in and it fired right up!

 

yeah its no spark to any of the 3 cyl. at all..its not out of time..cuz cyl 2 fires right when it needs to be..when the compression comes up number 2 cyl fires right on time...i was hoping it was just the cps sensor too..i was told where the sensor is just a magnet i can take it off and clean it and it might work or ive been told bad ecu or bad ground or bad cam/crank sensor..i just wanted some opinions before i go sinking money in it..

alright i will check the fuse...my luck it wont be something that simple..

alright i will check the fuse...my luck it wont be something that simple..

 

it wasnt a fuse i checked everyone..i just dont wanna take it to GM and it be something really simple i can do and them say it was something major and charge me outrageous,.cuz im low on cash where i bought the car straight out and didnt borrow...so anymore thoughts would be great imma try to change plugs tomorrow and take the cranksensor off and clean it and see what that does or just go get a new one...and if that doesnt work im stumped cuz i cant find a ecu anywhere around at a junkyard..and i dont have the cash for a new one...man i want this car to run..i had one before same color and all and loved it then it got took away from me by my step dad ..so thats why im so inpatient..thanks all of u guys for tryin to help..i appreciate it alot..imma try what i can tomorrow and ill let ya all know what it was if i can get it running

 

Fucked up wires going to the coil packs?

 

I dont know how it is in your state but in connecticut by law if you bring your vehicle down and they find what the problem is they have to get your consent to do the repair and give you a free estimate before they do any work to it by law. Sorry dont know much about engines in this type of situation but thought this might help you out...

 

huh..dealers here charge to even diagnose cars... dodge was $100 not sure on chevy. diagnosing is still labor, I cant see it being free...

 

It cost 90 dollars here at the dealership to take your car and spend an hour to diagnose the problem. Then If you get the dealership to fix it that 90 bucks will go towards fixing it. If not 90 bucks is to them and you walk out the door with your problem known. When I was having my evap I thought about doing it but could justify paying 90 bucks to fix a 45 dollar item which I thought was the problem. Turns out i was right. Oh and forget about an appointment I went a week ahead to get appointment for my car to be looked at and after waiting 3 hours I decide to say screw it and asked for my key and left.

Back to your problems.

I was having the same problem with my car after running it into water. All my coilpacks were good I could switch them over between all the cylinders but they would only work on 2-3 and I checked all my fuses and all were good and it turns out the reluctor wheel that tells the CPS where the crank is actually at was bent. Im hoping your problem is simple if not your going to need around 800+ bucks to buy a new crankshaft because from what I hear you have the by the entire assembly instead of just the reluctor wheel.

 

yea dealers here will charge whatever they want and say what they want...and man i hope its not my relucter wheel..i dont have 800 dollars and wont for a while ...i hope its just something simple...im flat broke from buying the car at 5 grand..and im hoping its just the cps sensor or bad plugs or ecu...if it is the crankshaft i seen one on the for sale forums for only 100 dollars..ill buy it...just getting someone not to charge a arm and a leg to change the crank...man i never come out good on anything...when i bought the car i was hoping something simple and me get lucky...but nope when that guy said bad motor and all it would do is crank he must new...but maybe 5 thousand for it wasnt to cheap..

 

really if the motor is the only problem with it you got a bad ass deal. You can find a used crankshaft on here pretty cheap. And maybe you can get lucky and find someone thats on here that lives close to you that maybe you can give them some cash and you help them do it.

 

my car did the same thing during the summer. forgot what it was called that got fried. h.o. ill get a picture of it


the silver thing on the spark plug cover

i had a extra one laying around and it dident work. went to the dealer and they replaced it then it worked. they also changed the coil packs

 

the lsj don't have that box.

 

well as far as i got today was taking the starter bolts off ...had to find a 18mm wrench and it was late anyways...but tom morning imma try and take the starter off i tried tonight and couldnt get it to budge at all and i took all the bolts out well top and botton bolt...and i thought a crank sensor was outrageous and it wasnt but 20 dollars at advance so imma get one tom and if that dont work imma check the reluctor wheel by looking in that hole and turn the harmonic balancer bolt and see if its bent or not...if it is i found a guy that has a crankshaft on the classifieds for 100.00 shipped..and thats all i need to try and see if i bent the wheel or not..so anymore help would be greatly appreciated before i go buying a crank so i can try some other things out ...imma def try the crank sensor tom cuz it is still bringing up the P0315 code saying crank sensor not learnt to ecu ..so i hope when i change it out tomorrow that fixes it..but gm told me that with that code it should still start up and run..but idk..thanks guys

 

Well if the reluctor wheel isn't bent at all then your good nothing else on the crank should keep you from firing on all cylinders. From the crank you have the crank position sensor so check that next but I will say most time that if it is your CPS you won't get fire at all not just on one cylinder.

I would do this in this order:

Check your spark plugs (make sure they are all good by switching them to the coilpack that is firing and see if you get a spark from them.)
Check your coilpacks ( I think you've already done this but if you haven't disconnect the coilpack and switch them to see if your spark changes If it does then its your coilpack)
Check Fuses ( I can't stress this enough! check every damn fuse that has to do with your ignition... Buy a tester just to be sure if your not good with checking fuses)
Check your Reluctor wheel ( If its bent it won't be able to provide a signal to the CPS)
Check CPS (Honestly i would just buy one and if it doesn't fix your problem at least you have a new sensor you shouldn't have to worry about)


Good luck

 

alright man i appreciate your help so much...and yeah i just bought new plugs and put them in today and still nothing and i swapped the coilpacks and put them on the only cylinder that does fire and they all fired and i even took the coilpack off cylinder 2 and put it on the bad cylinders and they still didnt fire...so man u have got me believeing its the reluctor wheel and i pray to god not but it does make sense the cps sensor wouldnt just cause one to fire they all would be out...damnit this sucks..i can get a crankshaft its just paying someone to drop my motor and put a crankshaft in ...thats gonna cost alot and if imma pay someone to do that i might as well put other new stuff in it since the crankshaft is bad...illl put a ported head and stuff on it and just other things i can think of that will help it out alot or maybe u can tell me what i can put in that motor that helps out alot and that might need replacing since the reluctor wheel is bad..might as well do it all and so i dont have to drop the motor again and itll run better...well its already got stage 2 with it when i bought the car...its got 42 inj..and a 2.9 pulley...so it should run good...idk i cant complain much i got the car for 4800.00 dollars and he thought it had a bad motor....

 

I will say this your internals will keep up to the power the m62 is able to put out in terms of power without going nitrous etc. Some people can go over 400 on stock internals and some blow theirs up with less than 350. But I will say ported head will be one of your biggest gains so I would put a new crankshaft in and port your head and be done with it as far as your motor. Your internals will last you a while. I would also invest in a header/downpipe combo from zzp.

Also you can get a used motor for these things hella cheap too.

 

alright well i got some better news...i found a paper with the previous owners number and called him and he told me all about the car...it was in a rain storm and flooded it well he said it had no power at all for 2 or 3 days then everything started to come back on and he said he paid a shop well over 3000 dollars to pull the motor apart and they said the motor looked great and no water got in it and they checked the head and it was great but they couldnt get it to fire either and he said he just went ahead and sold it cuz his uncle said that he already had over 5 grand in it just doing that to the motor and if he went anymore he would have more than whats its worth in it...but he also said they put a new ecu in it and some new sensors he didnt remember which ones but now i know why the code P0315 comes up saying crank sensor not learned to ecu itll say that when u swap ecus....well atleast i know now its not the reluctor wheel or crank cuz he said they never got to crank it and it start they cleaned the motor completely before it even wanted to start...and they replaced stuff and it still wouldnt turn over and his uncle which owned the shop said it has to be in the wiring harness...which idk maybe u guys can give me some more info now since i told u what caused it to do this...as long as there wasnt any water in the motor im happy...i found a wrecked ss/sc and it has a good motor and ecu and wiring harness so imma just take it to gm tom and see if they can figure out whats wrong with it i hope and not take forever at 65 dollars an hr..if it is the wiring harness i can get it for 100 dollars out of that wrecked car and imma still buy that motor from it for only 500 dollars with supercharger and all....and imma get the ecu too...another question will gm reflash my ecu where i have stage 2 and had to put a new ecu in the car well he did and didnt have it flashed to stage 2 after that just had it programmed to the car...and what will they charge prob a hrs work or will they charge me more...thanks guys