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Old 02-17-2005, 15:33   #1 (permalink)
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how to do a self diagnosis test on a 93 eb?

I got a 93 eb with either a buggered coil or tfi module.Usual problem i think.12v at the input to the coil but no spark out.Still , i would like to know how connect to the car to do the test - the input connector is under the dash.By the way its a smartlock model.
Can anyone help this gumby?
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Old 02-17-2005, 16:19   #2 (permalink)
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Re: how to do a self diagnosis test on a 93 eb?

Going for the diagnosis readout won't necessarily help you locate ignition/no spark problems - provided there's nothing wrong with the Smartlock and the car is "alive" and ready to run. Does the fuel pump whir for few seconds when you turn the ignition on? You have to go for tests and fixes aimed directly at the ignition system - and you're in the right area with the TFI module and coil. Frequently they both grenade at the same time.

If you have access to multimeters etc. you can probe the connector on the TFI module looking for voltages in the right place. You need a bit of circutry diagram for this. But generally you can bet that it it is one or both of the above items that's failed. Sod's law says you'll replace the wrong item first. If you can twist a friendly retailer's arm, borrow a coil and try that first. Ohter than that it's likely to be the TFI. The coil's a bugger to do, and remove the airbox for getting to the dissy to do the TFI.
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Old 02-17-2005, 18:07   #3 (permalink)
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Re: how to do a self diagnosis test on a 93 eb?

Quote:
Originally Posted by fordboy98
Going for the diagnosis readout won't necessarily help you locate ignition/no spark problems - provided there's nothing wrong with the Smartlock and the car is "alive" and ready to run. Does the fuel pump whir for few seconds when you turn the ignition on? You have to go for tests and fixes aimed directly at the ignition system - and you're in the right area with the TFI module and coil. Frequently they both grenade at the same time.

If you have access to multimeters etc. you can probe the connector on the TFI module looking for voltages in the right place. You need a bit of circutry diagram for this. But generally you can bet that it it is one or both of the above items that's failed. Sod's law says you'll replace the wrong item first. If you can twist a friendly retailer's arm, borrow a coil and try that first. Ohter than that it's likely to be the TFI. The coil's a bugger to do, and remove the airbox for getting to the dissy to do the TFI.
Cheers mate , I've checked the statis of the smartlock - ok ,fuel pump relay and ignition relay are both getting power and the caris getting fuel.I did notice that there was acrack in the coil casing so that is probably the best place to start.
I'll give it a go.
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Old 02-20-2005, 17:36   #4 (permalink)
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Re: how to do a self diagnosis test on a 93 eb?

Jeez, hope it hasn't done what my ol' VK did.
The ol' VK had a spike in the ECU and put full current flow through the coil. It was slightly cracked/melted. Ended up changing the ECU and coil...bugger.
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