Injectors not firing
Thread Starter
Teching In
Joined: Sep 2005
Posts: 48
Likes: 0
From: Portland, OR
Injectors not firing I posted in the injection forum, but it would seem this is more of a PCM/electrical issue (and no ones responding over there).
Just completed my engine swap and it wont start.
My injectors arent firing while cranking, but I do have spark. The injectors have 12V to the pink wires, so I don't know what the problem is. Why would I have spark but no injectors?
Just completed my engine swap and it wont start.
My injectors arent firing while cranking, but I do have spark. The injectors have 12V to the pink wires, so I don't know what the problem is. Why would I have spark but no injectors?
you using all the stock stuff , just new injectors?
they use 12v , do you have an air tank? disconnect the fuel rail and all the injectors from the car
take the air tank and hook up to the front driver side of the fuel rail port(you may need some fittings) and slowly put air pressure to the injectors, take 12v + and - and touch the 2 prongs on each injector and you should hear them hiss.... BUT BE CAREFUL don't put too much air pressure as the injectors will probably shoot off the fuel rail, mostly it won't take more than 10psi to hear the injectors maybe 20psi..and when my injector flew off it was at 50..so don't do that, lol.
they use 12v , do you have an air tank? disconnect the fuel rail and all the injectors from the car
take the air tank and hook up to the front driver side of the fuel rail port(you may need some fittings) and slowly put air pressure to the injectors, take 12v + and - and touch the 2 prongs on each injector and you should hear them hiss.... BUT BE CAREFUL don't put too much air pressure as the injectors will probably shoot off the fuel rail, mostly it won't take more than 10psi to hear the injectors maybe 20psi..and when my injector flew off it was at 50..so don't do that, lol.
Thread Starter
Teching In
Joined: Sep 2005
Posts: 48
Likes: 0
From: Portland, OR
did a little searching for crank relearn, cam sensor, and crank sensor, and it would appear they dont stop the injectors from firing. but of course i could be wrong. looks like people are saying that with bad sensors the cars just spray a lot of gas to compensate.
also- dont the CAS and CPS affect the spark?
the injectors arent new or anything- i bought the engine just the way it is and am trying to start it for the first time.
also- dont the CAS and CPS affect the spark?
the injectors arent new or anything- i bought the engine just the way it is and am trying to start it for the first time.
Last edited by josh18_2k; Jun 23, 2006 at 10:25 PM.
I'm currently having an issue with ONE injector not firing. The other 7 are. The injectors has been swapped from a cylinder that was firing fine back to this one and nwo that injector is not firing, so the injector itself has been eliminated as a cause of the problem.
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Verdad Gallardo has anyone tried what I said?, hell simply take your fuel rail and somehow pulse at the injectors w/12v and see if the run(have the car in the run position where the pump runs and pressurizes the system).. i'm running out of tests here..
Thread Starter
Teching In
Joined: Sep 2005
Posts: 48
Likes: 0
From: Portland, OR
yah im a bit afraid to put 12v across the injector by hand. the last thing i need is to fry one of em.
as for the grounds- how do i check them? i checked the #1 pin on both the red and blue connectors and theyre both grounded. is there some specific way i can test my injector plugs? either with voltage or resistance readings? ive done both, but i dont know what they mean.
as for the grounds- how do i check them? i checked the #1 pin on both the red and blue connectors and theyre both grounded. is there some specific way i can test my injector plugs? either with voltage or resistance readings? ive done both, but i dont know what they mean.
