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I did a FULL BUILD and my Car wont start?

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Old Jun 20, 2011 | 12:42 PM
  #16  
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One possibility, if your coolant sensor is disconnected the car will read something like -78* and dump fuel. It will crank with pretty much no signs of firing like that.
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Old Jun 20, 2011 | 12:43 PM
  #17  
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Originally Posted by CO_VR4
If you have a "real" mechanic helping you with this build, he should be responsible for getting the motor started for the first time.

You need to pay attention to this process, or you can damage parts. You need oil pressure first. The best way to get this is to prelube/pressurize the motor. If not, you need to have a way to insure that you have good oil pressure before you do anything else. There are startup procedure threads you should read carefully. If you crank repeatedly with no oil pressure, well, you'll be pulling that motor again soon...

Next, you should make sure you have fuel, but remember that if you are hunting another problem and keep cranking the motor when it's not starting, you'll wash down the lubrication off the cylinder walls, particularly if you have big injectors and don't have your ECU management figured out. That can cost you a motor, too.

You have changed so many things all at once that it may be difficult to find the problem. Go about it methodically and double check everything before you just start cranking, hoping that something has changed when you turn the key.
Very good points here !
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Old Jun 20, 2011 | 08:41 PM
  #18  
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Just to give you an idea of what i am working with:

Compression on Evo


#1 30psi
#2 1psi
#3 43psi
#4 0psi
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Old Jun 20, 2011 | 08:47 PM
  #19  
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Could be the cam angle sensor is backwards
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Old Jun 20, 2011 | 08:48 PM
  #20  
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That doesn't seem right to me. ^^^^
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Old Jun 20, 2011 | 08:52 PM
  #21  
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Ive seen it before , wont start just crank .
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Old Jun 20, 2011 | 08:56 PM
  #22  
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If its the tune you can always throw in stock injectors and factory map .
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Old Jun 20, 2011 | 09:15 PM
  #23  
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Originally Posted by The-Evo
Just to give you an idea of what i am working with:

Compression on Evo


#1 30psi
#2 1psi
#3 43psi
#4 0psi
was there any weird noises when first trying to start the car up. because the compression numbers look horrible like the worst i have ever seen. make sure the car is on time mechanically. if the car has compression you should be able to hear it in sometimes you can hear it though the exhaust. report back to us.
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Old Jun 20, 2011 | 09:19 PM
  #24  
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Nvm didnt see the compression results ...Wow that is very bad .....is there even piston rings in there lol

Well since there all that bad first check and make sure the gauge is good .
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Old Jun 20, 2011 | 10:05 PM
  #25  
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Originally Posted by The-Evo
Just to give you an idea of what i am working with:

Compression on Evo


#1 30psi
#2 1psi
#3 43psi
#4 0psi
How did you do the compression test? Since you have a brand new short block and a brand new head, I'd guess that the compression test procedure should be double checked.

The large cams make that more likely as well.

There are several threads on here that explain exactly how to do the compression test. If you have access to a leak down tester, or your mechanic has one, that is another option that gives you better accuracy.
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Old Jun 20, 2011 | 10:18 PM
  #26  
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Originally Posted by The-Evo
Just to give you an idea of what i am working with:

Compression on Evo


#1 30psi
#2 1psi
#3 43psi
#4 0psi
whoa thats like a bad head gasket and rings all in one! lol those numbers gotta be wrong for a new motor. ive seen blown up motors with better compression numbers!
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Old Jun 20, 2011 | 11:15 PM
  #27  
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Is your cam timing off?
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Old Jun 20, 2011 | 11:55 PM
  #28  
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damn that poor engine.. you did a compression test before even firing it up? thats pointless.

when you do get it started, dont let it get to operating temp then shut it down..... thats the worst thing you can do to a new engine.

after it is running with break in oil you need to perform vacuum pulls so the rings seal and the metal shavings get sucked out and dont scuff anything.

i hope you opened your oil pump and lubed the **** out of it with assembly lube.. if not you will damage it doing what you're doing.

as someone mentioned, if the cam position sensor is 180deg out it wont start the car either and will act funky.

if crank angle sensor is messed up you get no spark or fuel also.

so far i see lots of good info being given to you in this thread though.

right now though you're really abusing that engine just cranking it over and over and over without or really low oil pressure.
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Old Jun 21, 2011 | 02:41 AM
  #29  
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Okay. I figured it out. ITS BENT VALVES. My evo friend who says he's worked and built more evos than anyone on this island did the timing. And he did it incorrectly. He didnt line up the dowl pin holes on my harmonic dampner. It took me an hour but I pulled the head, and it looks like the exhaust side is damaged because there is score marks on the piston on the exhaust side only. I will have the machine shop pressure check everything for me?
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Old Jun 21, 2011 | 02:46 AM
  #30  
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Thanks for the advise. I will perform every task. It sucks that I just spent $20-30 thousand dollars to have a dumbass know it all **** up my timing and cause a damaged head.


Originally Posted by tscompusa
damn that poor engine.. you did a compression test
before even firing it up? thats pointless.

when you do get it started, dont let it get to operating temp then shut it down..... thats the worst thing you can do to a new engine.

after it is running with break in oil you need to perform vacuum pulls so the rings seal and the metal shavings get sucked out and dont scuff anything.

i hope you opened your oil pump and lubed the **** out of it with assembly lube.. if not you will damage it doing what you're doing.

as someone mentioned, if the cam position sensor is 180deg out it wont start the car either and will act funky.

if crank angle sensor is messed up you get no spark or fuel also.

so far i see lots of good info being given to you in this thread though.

right now though you're really abusing that engine just cranking it over and over and over without or really low oil pressure.
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