Georgia Fiero Club Forum
All Things Fiero => Tech Tips, Tech Questions => Topic started by: sixgun6 on October 10, 2010, 07:45:56 pm
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does any one know the injector wiring on 84 2.5 - have power on the red but no ground on the blue wire -how is the best way to back track for short ? if I ground the blue wire the car will start - any help thanks
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The injector is supposed to be pulsed, not have a constant supply. Whether the + is pulsed or the ground -- I don't know. If it's not being pulsed, your ignition module may be bad, or your pick-up coil.
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The problem with the ignition module can also occur on the V6's, too. One of our guys recently replaced a module but still couldn't get it to start. After running tests on all other aspects of the fuel system, he found he had no exciter pulse for the injector circuit.
Are you getting spark? Try a little fuel in the throttle body. If it tries to start, TopNotch is on the money.
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its not pulsing - the red wire has 12v but the blue doesnt seem to be grounding - if I tap the blue to ground the car will crank but its not pulsing - ideas ?
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Check the injector fuse in your fuse panel.
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so check injector fuse in panel if good replace ignition moduel in distributor ?
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any progress yet ?
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I couldn't get the Li'l Duke Coupe to start and found the injector wasn't spraying. I tapped it with a wrench while someone else cranked and it started working. In my case it seems to have been a gummed up injector.
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fuse is ok so I guess we will move to replace the module and hope we get a pulse
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When we refer to pulsing, it doesn't mean it's something you can see go off and on. It's a very high speed pulse and looks like a continuous spray to the naked eye. By your getting a spray when you ground the blue wire could mean that you have a faulty circuit on that side.
There are a number of ground wires from the engine to chassis and cradle. Just because you have a ground from the battery to the engine doesn't mean that ground is continuous to the ECM or any other part of the car. Inside the console just below the ECM is a black wire that is used for a ground. Make sure that's secure.
Going the cheapest route of throwing money without having a definitive solution, I'd pick up 2 or 3 braided ground straps. You can usually find them on the HELP rack at the parts stores. Generally they are 6 to 8 inches long. Bolt one from the engine to the deck hinge, one from somewhere on the block to the cradle and if you can find any other place to ground the engine and chassis, without the danger of it pulling taught when the engine moves, I'd put it there, too. Or just get a small coil of multi-strand insulated wire of a good gauge and make your own ground wires.
Where are you? Are you close enough that one of us can help you?
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hows it going with that short in the injector? haven't seen you post lately.
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been too cold to mess with it as shop is full of other projects - i live in tucker - i used a neod lite on the injector connection with no lighting
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will check the groundings
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?????
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how about an update?
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Have been sick and with the bad weather I havent been able to do much - plus my parents have both been in and out of the hospital so just not had time to put to this project - It is on the top of the list
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parents definetly come first
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problem solved bad module runs great - never take forgranted that a new part is good - sometimes they can be defective from the factory