Fuel Pulse question
10-19-2010, 10:30 PM
#1
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Fuel Pulse question What creates power to the injectors ?
I have finally got spark
and now im having a issue getting fuel.
I have a brand new fuel pump, 42lbs svo
im checking out the fuel filter and any clogged fuel line. Also checking out the fuel pressure regulator too.
My main issue is tho im not getting fuel pulse.
New Opti, New Coil, New ICM.
Also, i recently did a rebuild to this car just cant seem to get it all there.
any suggestions ?
I have finally got spark
and now im having a issue getting fuel.
I have a brand new fuel pump, 42lbs svo
im checking out the fuel filter and any clogged fuel line. Also checking out the fuel pressure regulator too.
My main issue is tho im not getting fuel pulse.
New Opti, New Coil, New ICM.
Also, i recently did a rebuild to this car just cant seem to get it all there.
any suggestions ?
10-20-2010, 06:44 AM
#2
Check to make sure the injector fuses are still good. There are two of them, both 7.5A, in the underhood fuse compartment.
If the fuses check out okay, use a noid light to see if the PCM is commanding them to fire.
You should also check to make sure you don't have any stored codes in the PCM. A DTC 16 indicates a loss of the low resolution pulse from the optispark and will cause the PCM to not fire the injectors.
Also, is your security light on? A fault in the theft deterrent module/relay will cause the PCM to disable the injectors.
If the fuses check out okay, use a noid light to see if the PCM is commanding them to fire.
You should also check to make sure you don't have any stored codes in the PCM. A DTC 16 indicates a loss of the low resolution pulse from the optispark and will cause the PCM to not fire the injectors.
Also, is your security light on? A fault in the theft deterrent module/relay will cause the PCM to disable the injectors.
10-20-2010, 08:30 AM
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Check to make sure the injector fuses are still good. There are two of them, both 7.5A, in the underhood fuse compartment.
If the fuses check out okay, use a noid light to see if the PCM is commanding them to fire.
You should also check to make sure you don't have any stored codes in the PCM. A DTC 16 indicates a loss of the low resolution pulse from the optispark and will cause the PCM to not fire the injectors.
Also, is your security light on? A fault in the theft deterrent module/relay will cause the PCM to disable the injectors.
If the fuses check out okay, use a noid light to see if the PCM is commanding them to fire.
You should also check to make sure you don't have any stored codes in the PCM. A DTC 16 indicates a loss of the low resolution pulse from the optispark and will cause the PCM to not fire the injectors.
Also, is your security light on? A fault in the theft deterrent module/relay will cause the PCM to disable the injectors.
I dont have a security light on, just when the key is on but not running which is normal.
as for the DTC 16, even if i fixed the problem and the code is still on. It will not fire ?
If i use the noid light and the computer is not talking to the injectors what do i do ?
10-20-2010, 08:48 AM
#4
Ill check out all of of those today.
I dont have a security light on, just when the key is on but not running which is normal.
as for the DTC 16, even if i fixed the problem and the code is still on. It will not fire ?
If i use the noid light and the computer is not talking to the injectors what do i do ?
I dont have a security light on, just when the key is on but not running which is normal.
as for the DTC 16, even if i fixed the problem and the code is still on. It will not fire ?
If i use the noid light and the computer is not talking to the injectors what do i do ?
If the injectors still don't fire (confirming you have good fuses and no codes are present) then you're going to be doing some wire hunting.
10-20-2010, 11:13 AM
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I checked the Fuses good
DTC was clear, no codes
theft module is fine
any other ideas ?
would pressure have anything to do why its not pulsing ?
ie. fuel filter, clogged line
10-20-2010, 11:17 AM
#7
Do you have 12v at the pink wire of each injector?
If you are positive the PCM is not pulsing the ground to fire each injector, you need to check on the low resolution pulse of the opti. Scan for codes while cranking.
Fuel pressure will not affect the injector pulse.
If you are positive the PCM is not pulsing the ground to fire each injector, you need to check on the low resolution pulse of the opti. Scan for codes while cranking.
Fuel pressure will not affect the injector pulse.
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10-20-2010, 12:28 PM
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ill check the 12v and other things around 2 and keep everyone updated. i really appericate the help guys!
10-20-2010, 01:45 PM
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thanks again and will keep everyone updated on the status. Should know by 4:00 PM
