ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: ricsrx on January 17, 2008, 06:33:50 PM
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Hello, I have a 1991 sidekick with the EFI 1.6, When i turn on the key the main relay, fuel pump relay and other emission relay's start clicking, motor turns over but will not start, checked plugs, no spark, I read in another post that this happens when there is a fault in the ECU, but it contained no further details on how to repair,
ricsrx
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Most people swap out the ECM for another one.
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yep just had mine rebuilt--exact same problem
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What was the cost of a rebuild?
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What was the cost of a rebuild?
go to http://bbs.zuwharrie.com (http://bbs.zuwharrie.com) and pm Surly (do a search for ECM to find a post of his) with your problem. Indicate the year and model.
He has been known to rebuild ECMs for a reasonable price.
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installed a new compputer today, its doing the same thing, any one have any other ideas :(
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You may have a short somewhere. Try disconnecting the sensors one by one to try and isolate the fault.
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thats what i am doing now, if i had a good print it would help, icant seam to find all sensors , i am unpluging them ine at a time, but only when i unplug the computer does the chattering stop. I am chasing that blue black wire all over
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Do the relays continually click when you are trying to start it? Or do they just click once when you turn the key on, then if you wait about 3 seconds (without trying to start it), they will click once more?
Could be a bad ground, could be a bad relay (or two).
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as soon as you turn on the key they start,, its probably a short , they take turns chattering after checking different items and trying the key , it looks ugly , im tyring to locate a print online, i also found an ald unused car alarm under the dash, what a scabed job.
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ECU wiring diagram is here:
http://www.btinternet.com/~j_holland/docs/installation.jpg
http://www.btinternet.com/~j_holland/docs/key.jpg
The Black/Blue wire is the 12V feed to the solenoids and stuff. Are you sure that the replacement ECU is good?
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i cant see two ECU's doing the same thing,
now after pulling wires i have lost power up to the key switch, what a mess
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i cant see two ECU's doing the same thing,
now after pulling wires i have lost power up to the key switch, what a mess
My first guess would be a bad ground, that is the usual sympton
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as soon as you turn on the key they start,, its probably a short , they take turns chattering after checking different items and trying the key , it looks ugly , im tyring to locate a print online, i also found an ald unused car alarm under the dash, what a scabed job.
Sounds like either bad relays or a bad ground.
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i cant see two ECU's doing the same thing,
I can, the symptoms that you have indicate that there is a problem with the 12V injector power circuit or the switched 12V supply (black/blue). This may be a problem internal to the ECU, usually caused by bad capacitors. The relay chatter is caused the by the ECU continuously resetting itself. It does this when it detects a major fault. It could still be a short or a bad contact in the connector but its usually the ECU.
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I swapped the ecu twice on my 1991 to solve the problem.I did not think that I could end up with 2 bad ecu's but I did.
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OK, I removed the old alarmsystem, that got me back to the origonal problem,I found that when I unpluged the Idle air control valve my relay chatering went away.
still no fire, no spark at plugs, 12v on the blk/wht wire to the coil, 12v on the brn/wht wire to the coil and to the igniter, no voltage on the orange wire to the igniter, what direction does the current flow,
12v on the blu/blk wire to the distributor.