My 91 buick 3.3 v6 has spark but no power to injectors its getting fuel to the fuel rail the injectors are brand new im at a loss for what it is. does anyone have any solutions to my problem?
Your injectors get their 12v from the asd relay and the computer controls their - side. the asd relay also powers the coil, so if you have spark but no juice to the injectors then you are looking for a broken wire to the injector rail. all of the injectors get their juice from that one source.
is it possible for that relay to b bad?
i ran a wire from the ground on one of the connectors on the injectors an tapped it on the battery a few times to see if the injectors would pulse and they all pulsed when i did that.
the relay is good. check the ground side of the circuit between the injectors and the computer.
ok. thank you. so if a wire is bad, do i have to replace the whole harness?
no, you just fix the wire. the wire you are tracing is the negative wire which goes to the computer; it might have one connector in that path. look for corroded connections along the way and repair them all as you see them. note the color of the wire you are tracing and see if you find that color at the pcm. if you do, then use an ohm meter to test that wire. test it for continuity and test it to ground (with it disconnected at both ends), it should show less than one ohm from end to end and infinity to ground. I'm sorry I don't have a schematic to make the search a little easier but it shouldn't be hard to test one wire. if the wire tests good, then you are looking at a bad circuit driver in the pcm.
whats a pcm?
your engine computer. Actually GM calls it an ECM (electronic control module)
It should be under or next to your fuse box in the engine compartment.
but my car doesnt have a fuse box in the engine compartment
then it should be behind your glove compartment. I couldn't get that information on a gm that old so I found out the '95 location. in the end, start at the injector harness and follow the wire; it will lead you to your destination.
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SOURCE: 93 Buick Skylark 3.3: WON'T START...new starter,
check the wires of crankshaft position sensor and if OK change the sensor.
i seen this problem several times on the same car.
SOURCE: 91 honda accord wont crank
There is a sensor under the left hand side of the dash that would not allow it to start, provided that you have replaced the electronic spark module inside the distributor first, which is what it sounds like it would be, When you say you replaced the distributor I assume you replaced it complete!
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injectors arent bad they are brand new. i had the same problem once before and replaced injectors and it ran perfect. i also tested them to make sure nd they pulse wen hotwired
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