LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

New motor,everythings new,no start.Diagnostic please...

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Old May 15, 2007 | 10:04 AM
  #46  
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Originally Posted by always faster

I ve re-think about it.When i ve done my pulse injector test with the noid light,the blink was not really bright.Then i ask myself:"the injector system is a 12volts system right??? so the blink on the noid light should be bright to...right?

I ve connect the noid light directly to the battery to see what kind of brightness it should have and i can tell you that the signal that i got from the negative pulse is maybe 75% less brighter than that.I can barely see it.

Does this mean that i could have a bad ground somewhere in the circuit?Or again my logic is bad
That kinda sounds like the same problem I`m having.
Old May 16, 2007 | 06:55 AM
  #47  
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TTT I need a answer on my post no 45
Old May 17, 2007 | 08:58 AM
  #48  
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From post no 45:

"I ve re-think about it.When i ve done my pulse injector test with the noid light,the blink was not really bright.Then i ask myself:"the injector system is a 12volts system right??? so the blink on the noid light should be bright to...right?

I ve connect the noid light directly to the battery to see what kind of brightness it should have and i can tell you that the signal that i got from the negative pulse is maybe 75% less brighter than that.I can barely see it.

Does this mean that i could have a bad ground somewhere in the circuit?Or again my logic is bad

Also could a bad signal of the opti could lead to this problem"

Still searching
Old May 18, 2007 | 04:56 PM
  #49  
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Ok here are some good news and some bad one after a full complete day of troubleshooting

Good:
-I ve installed a new clutch master cylinder since mine was broke in pieces
-I ve test my Accel and Racetronix injector(they are good)
-I ve check all my ground and wire with my multimeter and test light(nothing wrong)
-I ve unplug my fuel rail and connect it upside down so that the injector would point upward.Then i ve crank the car to see that I GOT FUEL .The injector are opening steady with a great atomisation when i crank the car.
-I ve check back and i got spark.

Bad:
-Still waiting on the my brand new opti
-The car still dont start damnit

One of my fellow mechanics told me to remove all the spark plug and injector fuse.Then crank the car to ventilate the combustion chamber because he think that my car is flooded.The put back some new plug and start it again and he says it would start...

What do you think guys?
Old May 18, 2007 | 06:16 PM
  #50  
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Hey at this point it's worth a shot. Can't hurt. Believe me...I feel your frustration.
Old May 20, 2007 | 08:18 AM
  #51  
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Originally Posted by always faster
-I ve check back and i got spark.

Bad:
-Still waiting on the my brand new opti
-The car still dont start damnit

One of my fellow mechanics told me to remove all the spark plug and injector fuse.Then crank the car to ventilate the combustion chamber because he think that my car is flooded.The put back some new plug and start it again and he says it would start...

What do you think guys?
I'm confused by that fact that you have spark but yet you are still going to install a new opti. What's up with that? Is it perhaps you know something that we haven't been told? Like did you check spark at all plugs or just one?

My experience has been if you have compression. You have spark. and you have fuel then the only thing that is left is the spark is occuring at the wrong time. The obvious first guess is the opti is installed incorrectly. However not knowing the details of your ignition, perhaps it could be something else causing your spark to occur at the wrong time?????????
Old May 20, 2007 | 12:38 PM
  #52  
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Originally Posted by speedygonzales
I'm confused by that fact that you have spark but yet you are still going to install a new opti. What's up with that? Is it perhaps you know something that we haven't been told? Like did you check spark at all plugs or just one?

My experience has been if you have compression. You have spark. and you have fuel then the only thing that is left is the spark is occuring at the wrong time. The obvious first guess is the opti is installed incorrectly. However not knowing the details of your ignition, perhaps it could be something else causing your spark to occur at the wrong time?????????
Dont worry im not hiding anything I ve just told myself that the only part that i didnt change was the opti.I found one new in the box for 200$ so i said to myself "why not".

I got spark on all spark with the DELTEQ but didnt redo the test with stock ignition system(only 2 plug).Im sure that i got fuel since the injector shoot a steady vaporisation.

Im king of lost because i got spark on no 1 cylindre at TDC at about 5/9 degree of advance wich is good so if my opti was wrongly installed i wouldnt have the good spark on the no1 cyl.

Im gonna put my plug off and put some new one but first i ll try a quick compression test just to confirm that the motor is not the issue.

I thank you all for your help,i know that diagnose a problem on the net is kinda hard and now with 4 pages of discussions we talk about pretty much everything that could happen

By the way if you wanna some info on the setup to help all of you fix the problem just ask me.

Just dont let me down lol
Old May 26, 2007 | 07:20 AM
  #53  
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ITS ALIVE!!!!! AND IST LOUD HAS HELL!!!

I took the compression and it gave me 200psi on all 8 cylindre so my engine was not the culprit.

I then receive my MSD pro billet distributor.I put it in and it start the first time with the Delteq system.

I bleed the coolant system and take it for the first 30miles breaking ride.The temps is perfect ,oil pressure is so good and the car feel really faster.

The only small thing that i got is a wisthle that incrase in soud has the rpm goes up.Check for leak or problem like an accessories(took off the belt) but it was still there.My friend mechnaic told me that the negine was probably assembled "thight" so the wisthle will go away after some more miles.

Other thing is the sterring linkage that rub sometimes on the headers.

I would like to thank everyone for helping me finding the problem.The car will go in th epaint boot in th end of july and then i ll send some pics and all the specs.

Thanks
Old May 26, 2007 | 10:59 AM
  #54  
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Glad you got it up! That whistle could be the throttle body. Are you using a BBK tb? Again congrats to getting it up and running.
Old May 26, 2007 | 11:17 AM
  #55  
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Originally Posted by ZBLKHELLRZR
Glad you got it up! That whistle could be the throttle body. Are you using a BBK tb? Again congrats to getting it up and running.

Why the TB???

Im using a stcoker professionnaly ported to 52mm.
Old May 26, 2007 | 01:58 PM
  #56  
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If you're running a CAI and no silencer, you will probably hear a whistle.
Old May 26, 2007 | 08:29 PM
  #57  
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Originally Posted by I EAT T/A
If you're running a CAI and no silencer, you will probably hear a whistle.

Yeah nut i was running the same cai/no silencer on my original motor and never heard this.

This is louder has the rpm rise and maybe even has loud has my exaust setup(lt/y pipe/no cats)

I ll make another thread for this particulary problem since this thread is close

Last edited by always faster; May 26, 2007 at 08:48 PM.
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