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Injectors wont fire on SR

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Old Jan 12, 2005 | 10:43 AM
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Default Re: Re: Re: Injectors wont fire on SR

Originally posted by TurboS13Hatch
The cam angle sensor is a chopper wheel, with a LED to read the spaces in the wheel as it spins. By reading the teeth, it tells the ECU where the engine is at in it's rotation. By having that piece of info(along with a ton of other info from various sensors).. the ECU can run the engine off of a preset map.

Travis
so, if the car is running shitty and im getting that code on the ecu...then im guessing its pretty important that i replace this. Hard to do?
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Old Jan 12, 2005 | 10:44 AM
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como esta?
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Old Jan 12, 2005 | 02:02 PM
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Originally posted by buck19
como esta?
what? why'd u say whats up? im confused. anyways, is it hard to replace the crank angle sensor? never heard of anyone having a problem with it and replacing it before.
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Old Jan 12, 2005 | 07:21 PM
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Originally posted by Taylor Durden
then why is that every vehicle that has factory low impedance injectors has the resistor box on the power side? remember, factory boxes only have 5 wires. 1 power source in, 4 power sources out to the injectors. why would you want resistance on the ground? dont you think that would slow the reaction time of the pulse? when its on the power side, the feed is constant and the trigger is uninhibited.

Alright all of you wanna-be electrical engineers, it doesn't matter what side they go on. The same current flows through both elements no matter what order they are in. The reaction time is based on the magnitude of the combined impedance from the injector and resistor, along with the electro-mechanical work done by the coil's magnetic field. It has nothing to with something as trivial as element order. The same voltage drops across the two elements in both configurations.

How about some generalized equations.
V=IR, so I=(V/R). Follow?
Is (12/(5+7)) the same thing as (12/7+5)? If you got 1 for both equations, you're right. Now, I could work out the transient response too, but we wouldn't get too far into that exercise before the answer became evident.

This isn't an attack on anyone, just a general message. Don't try to pass off stuff you think you know as the truth. Keep it real!
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Old Jan 12, 2005 | 08:47 PM
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That's why I'm not an electrical engineer..

I put them the way that I was taught to put them.. and it works just fine. I don't need to know "why" it works.. I just know that it does.


Travis
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Old Jan 13, 2005 | 04:05 AM
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Originally posted by Epstein
Alright all of you wanna-be electrical engineers, it doesn't matter what side they go on. The same current flows through both elements no matter what order they are in.
Originally posted by StreetRacingOnline
i have seen the resistors on both sides of the lead.
DING DING we have a winner!!!
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Old Jan 13, 2005 | 04:41 AM
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Originally posted by TurboS13Hatch
.. I just know that it does.
Travis
and knowing is half the battle!

Sounds like you figured out your own problem with the KA ECU. Hopefully this won't hold you up too bad.
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Old Jan 13, 2005 | 05:36 AM
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i was just going by past experience on a certian car that i fixed his harness for. when i put a resistor pack on the power side, it cleared up his problems.

That, and putting resistors inline on each wire for the injector triggers doesnt look very nice and usually, the thin wire for the resistor wiggles off
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Old Jan 13, 2005 | 05:43 AM
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well shit, no matter which way it goes i am grateful to all of you guys for taking your time and trying to help.......Hopefully the car will be running this evening and i can pick it up tomorrow so i can be back here for saturday....."god willing".



thank you guys.....
Norlandt
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Old Jan 14, 2005 | 06:43 AM
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ok so riding at 60mph on the highway last night breaking in the car...the distributor craps out on us.........there was no spark.....does anyone know a local exorcist?....Jesus.....Someone have a b13 distributor?



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