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tpi issues

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Old Feb 4, 2010 | 07:30 PM
  #1  
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tpi issues

posted this in another section but got no answer.

Ok, I have a 1971 Nova that i have swapped a TPI system into it runs a speed density setup and is stock except for the headers. I have been driving the car for about a year now and this is the first time it has done something like this. so hear goes.
The car started fine and as i drove it it started to have a skip to it. and was running rough all around. i drove it home and pulled into the shop and shut it down and tried to restart but it would only turn over.
Spark is good, fuel pressure is good, but i do have a leak as the pressure dropped rather quick ( down to 10 or 15lbs in 20 min).
I pulled the intake apart to check and make sure the injectors were not leaking and they are not. i also just turned the engine over to see if they would fire and got nothing???
I have power at all of the injectors on both terminals in the clips themselves? i thought you were only suppose to have power on one side and not the other?? i also turned the engine over with a test light hooked to the injector connectors and got a dim light? I also checked the injectors themselves and found that they would work when i would power them up myslef?
I know that these systems give problems with the injectors so it would not suprise me if i need to replace them. im just confused as to why they would work individually but, i can not seem to get the computer to control them, maybe they are just clogged and i can't hear them openining over the engin turning?
Also should i see a bim light when hooking the test light up to the connectors or should it be nice and bright? im wondering if the computer could be going out or possible bad ground?
Thanks in advance
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Old Feb 5, 2010 | 06:56 AM
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: tpi issues

Check the resistance of the injectors (individually). Any that are under 12 ohms are bad. Which if these are still the stock Multec injectors, will probably find some in the 3 - 4 ohm range. Just replace them all with a set of good Bosch injectors.

RBob.
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Old Feb 5, 2010 | 07:01 PM
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Re: tpi issues

Originally Posted by RBob
Check the resistance of the injectors (individually). Any that are under 12 ohms are bad. Which if these are still the stock Multec injectors, will probably find some in the 3 - 4 ohm range. Just replace them all with a set of good Bosch injectors.

RBob.
I checked them this morning and am getting around 16 ohms cold... i have no way to get them warm at the time being.. i also had a few more injectors laying around and tried them but still nothing..
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Old Feb 7, 2010 | 07:12 PM
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Re: tpi issues

well i got to do some more work on it today, i pullled the computer and jumped the wiring at the connector for the injectors and got the to fire off.. I checked my ignition module and it tested good. so i replaced the computer.
well it now runs but i now have to spray starting fluid to get it to start and it still skips. i let it get warm and checked the injectors... half of the things wouln't even working checked the resistance and was getting anywhere from 16 down to 2.5. so yeah belive i need some injectors.
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Old Feb 8, 2010 | 06:33 AM
  #5  
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From: Bloomfield, IN
Car: 87 Camaro
Engine: 305
Transmission: 700R4
Re: tpi issues

Well pop some of those babies in there and let us know if she runs good.
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Old Feb 8, 2010 | 09:14 PM
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Re: tpi issues

well i had some injectors for another system that i will be putting in and the engine started right up and is running a lot smoother.. i will be ording some bosch III tomorow. =)
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Old Feb 8, 2010 | 10:52 PM
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Re: tpi issues

Originally Posted by dsw12387
well i had some injectors for another system that i will be putting in and the engine started right up and is running a lot smoother.. i will be ording some bosch III tomorow. =)
get your bosch lll's from southbay fuel injectors...great company to deal with.

www.southbayfuelinjectors.com
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