What voltage should I see at the injectors?
12-14-2003, 07:16 PM
#1
What voltage should I see at the injectors?
I saw ~12 volts on one side, and 13.17-13.26 on the other. The 13+ voltage was not consistant at all. It could have been the "pulse", but I thought that was a ~.5 Volt signal?
Any help here would be great. Thanks
Any help here would be great. Thanks
12-14-2003, 08:10 PM
#2
Supporting Maxima.org Member
Join Date: Jul 2002
Posts: 205
Since the injectors' pulse width is controlled by time (how long it has voltage), I would guess it should be battery voltage and all six should be the same.
Originally Posted by bags533
I saw ~12 volts on one side, and 13.17-13.26 on the other. The 13+ voltage was not consistant at all. It could have been the "pulse", but I thought that was a ~.5 Volt signal?
Any help here would be great. Thanks
Any help here would be great. Thanks
12-14-2003, 08:53 PM
#3
Originally Posted by Lonely Driver
Since the injectors' pulse width is controlled by time (how long it has voltage), I would guess it should be battery voltage and all six should be the same.
I did not make myself clear.
I read voltage on the front 3 injectors. On 1 side of EACH injector I saw 12 volts. On the other side of the smae injector I saw 13.3 volts.
I understand about the pluse. I "thought" I should see 0 volts and then .5 volts and then 0 volts, etc...
I am confused about the 13+ volts.
BTW this was during cold start
hopefully that helps
12-14-2003, 09:44 PM
#5
Gotta see battery voltage on all injectors. Another thing Kirk you should do is check the resistance on the injectors with the plug off so we can make sure the injectors are still good. You should be seeing 10-14ohms on the injector itself at say 77F room temp. If not, then the injector is either locked open or closed.
Check those things out to make sure on that side.
Also you wont be able to see it go from 0 to battery voltage cause it switches so fast that no voltmeter is going to be to read it unless you got a computerized one with datalogging which can measure it every 1ms or so.
Dixit
Check those things out to make sure on that side.
Also you wont be able to see it go from 0 to battery voltage cause it switches so fast that no voltmeter is going to be to read it unless you got a computerized one with datalogging which can measure it every 1ms or so.
Dixit
12-15-2003, 11:28 AM
#6
Originally Posted by subs1000w
well for one the pulses are so fast i really dont think any miltimeter could read that fast
why are you trying to figure out the voltage of the injectors anyway
why are you trying to figure out the voltage of the injectors anyway
I was trying to see if one of them was either stuck open or closed.
And I think you and dixit are correct, the pluse is very short. I read the FSM and it is like a .5 sec thing. I could hook up an oscilloscope and see it, I think. But that is way to much effort..lol
Dixit, I have not found the resistance readings in the FSM. Could you point me to a page. Thanks
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