what is this?

[muscleman]

my 94z has a bad"hobble" while driving, and a low rpm miss at idle.i finally found the code its throwing at me. i found troublecodes.net and it said 18 was "injector driver circuit voltage to pcm was wrong for 4 seconds". im feeling kinda dumb but what do i look at? ive replaced ALL ignition electrical parts( brand new msd opti, wires, plugs, coil, module)ive gone over them a few timesto make sure everythings on right. any help would be great,thanks

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[02StanGT]

The only thing I can think of that it may be, is a faulty injector. That would explain your symptoms.

[muscleman]

i was thinking along those lines as well, im just wondering if its faulty wiring, or the injector(s) themselves.. is there a way to test any of these?

[02StanGT]

You can listen to each injector to see if they are all firing. They make a clicking sound when they fire. Below are some quotes from another site, pertaining to your problem.

"Some injector's terminals are prone to corrosion. Clean and use silicone grease in them. Older connectors can get brittle due to the heat, replace damaged connectors if needed."


"A 9 volt battery can be used to check for stuck injectors, listen for a click. Don't use the car's battery for testing, it can overheat the injector coil, (especially low impedance injectors). Just because an injector "clicks", it doesn't mean that it flows correctly, it just indicates it's not stuck.
If injectors are stuck after sitting for a short time, sometimes a "tap" with a small hammer on the metal body can free it. Don't break anything... I said "tap". If that doesn't work, send them to us. "