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Need Help on a 87' FC

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Old 07-31-13, 08:50 PM
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Need Help on a 87' FC

whats up everyone so my problem is this im going to buy a privately owned FC this friday and guy says there is a bad fuse causing the car not to start to I guess? But he says when the car runs it runs good so im a bit confused. I plan on getting the car either way because i doubt ill find a fc this close to me at the price he is asking for. I made up my mind that its going to be project so what ever work needs to be done i don't mind. So my question is this what fuse in the fuse box could cause this problem? ...I know its not alot to go on but any advice or links or schematics of fuse layout would help. Thanks in advance.
-David
Old 08-01-13, 06:30 AM
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I do believe you can find the entire owners manual on this forum for download. None the less it really comes down to what he means by it not starting. If the starter engages every time then I would try and listen to see if the fuel pump is engaging. Its a start anyway. Good luck
Old 08-01-13, 06:59 AM
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Thanks I look into it some more but I'm at work right now, but when I get home ill download the manual thanks for the help
Old 08-01-13, 07:08 AM
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Anytime. Let me know what comes out of it and if you have any other questions. I'll do my best to help.
Old 08-01-13, 07:26 AM
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I just skimmed through it but it looks very helpful. Go to the generation specific section... 2nd gen... stickies... frequently asked questions posted by icemarck... it has wiring diagrams... I tried to copy the link
Old 08-01-13, 07:33 AM
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Alright ill check it out on my lunch break if I can are/r were you a tech for Mazda
Old 08-01-13, 08:08 AM
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Originally Posted by The Repair Man
I just skimmed through it but it looks very helpful. Go to the generation specific section... 2nd gen... stickies... frequently asked questions posted by icemarck... it has wiring diagrams... I tried to copy the link
How much is the owners manual still plan on getting it just Dont know if something I should get now or later
Old 08-01-13, 08:19 AM
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you can pick up a haynes for under $20 on rockauto.

How long has this car sat? How old is the owner, as in, How do you figure it was driven?

Condition wise 1 through 10? and for what price?

This is the kind of information that will bring in the heavy knowledge types on this forum.

every day is another dude throwing his wallet into the canyon of the abyss known as the rx7.

But if you like it, (I love mine) go for it. its all personal preference. Just prepare to spend hours/days on this site, and pace yourself on repairs unless you enjoy being broke, or are some baller.
Old 08-01-13, 10:18 AM
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You want to check the three different fuses necessary for starting the car, the EGI Comp fuse, the EGI Inj fuse and the 15 amp Engine fuse. If the B/Y wires at either of the coils has 12 volts w/key to on then the Engine fuse and EGI INJ fuse is good. If the Black/White wire in the check connector w/four wires near the lead coil has 12 volts w/key to on then the EGI Comp fuse is good as well. This should take but a couple of minutes to verify.

If the wipers or turn signals don't work w/key to on then check the Main fuse. If the car turns over but does not start then this fuse is good.

Last edited by satch; 08-01-13 at 10:21 AM.
Old 08-01-13, 12:22 PM
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Originally Posted by archaphil
you can pick up a haynes for under $20 on rockauto.

How long has this car sat? How old is the owner, as in, How do you figure it was driven?

Condition wise 1 through 10? and for what price?

This is the kind of information that will bring in the heavy knowledge types on this forum.

every day is another dude throwing his wallet into the canyon of the abyss known as the rx7.

But if you like it, (I love mine) go for it. its all personal preference. Just prepare to spend hours/days on this site, and pace yourself on repairs unless you enjoy being broke, or are some baller.
No I don't enjoy being broke lol I will heed your advice on pacing I promise on that but the interior was well kept it was going to be project car but the owner lost interest in it he redid the interior the paint however is starting to go bad but he is asking 900 cash for it.
Old 08-01-13, 12:25 PM
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Originally Posted by satch
You want to check the three different fuses necessary for starting the car, the EGI Comp fuse, the EGI Inj fuse and the 15 amp Engine fuse. If the B/Y wires at either of the coils has 12 volts w/key to on then the Engine fuse and EGI INJ fuse is good. If the Black/White wire in the check connector w/four wires near the lead coil has 12 volts w/key to on then the EGI Comp fuse is good as well. This should take but a couple of minutes to verify.

If the wipers or turn signals don't work w/key to on then check the Main fuse. If the car turns over but does not start then this fuse is good.
Ok ill look into that when I goto get the car tommorrow. But he said the car won't start at all because of the fuse but that it runs great once it starts. He als claims that the fuse is melted a little bit to
Old 08-01-13, 03:13 PM
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Originally Posted by SpeedLoverD
Ok ill look into that when I goto get the car tommorrow. But he said the car won't start at all because of the fuse but that it runs great once it starts. He als claims that the fuse is melted a little bit to
Why did the fuse melt?? fuses dont jsut melt for no good reason . either he put a fuse that was to low amp , or there is a short in the system . or the heat got to it and the actual metal part of the fuse didnt melt and you have another issue.
Old 08-01-13, 05:47 PM
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Originally Posted by Tem120

Why did the fuse melt?? fuses dont jsut melt for no good reason . either he put a fuse that was to low amp , or there is a short in the system . or the heat got to it and the actual metal part of the fuse didnt melt and you have another issue.
That is what has been bothering me all day the guy is gonna send me a pick of what the fuse compartment looks like ill post when I get the picture
Old 08-01-13, 07:09 PM
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Originally Posted by Tem120

Why did the fuse melt?? fuses dont jsut melt for no good reason . either he put a fuse that was to low amp , or there is a short in the system . or the heat got to it and the actual metal part of the fuse didnt melt and you have another issue.
You will have to let me know if you can't the see the pictures but its the main 80amp fuse in the cluster by what it looks like is the driver side corner

Need Help on a 87' FC-image-2432092332.jpg



Need Help on a 87' FC-image-170715950.jpg
Old 08-01-13, 07:41 PM
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Main fuse powers the Ignition Switch and the two fuses at the top of the interior fuse box which are the Heater and Defroster fuses. The alternator also connects to one of the wires connected to the Main fuse.
Old 08-01-13, 07:50 PM
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Originally Posted by satch
Main fuse powers the Ignition Switch and the two fuses at the top of the interior fuse box which are the Heater and Defroster fuses. The alternator also connects to one of the wires connected to the Main fuse.
you think the link between the wire and the fuse is bad and that caused it to melt perhaps. Or is it more likely another problem.
Old 08-01-13, 08:06 PM
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Is this a turbo or not? If it is then the intercooler touching the alternator output wire could be the cause. Could be another wire touching the two wires connected to either side of the Main fuse specifically if a bare wire is touching a bare part of either of these two wires. You could rule out the wire running to the Heater fuse by pulling this fuse and the same thing could be done w/the Defroster fuse. And if the Ignition Switch is the cause then locate the plug just below the output wire (side of the Main fuse closer to the trailing coil) coming from the Main fuse which mates w/the Black wire that feeds this switch.

Using an ohm meter should help you to locate the problem.
Old 08-01-13, 08:12 PM
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Originally Posted by satch
Is this a turbo or not? If it is then the intercooler touching the alternator output wire could be the cause. Could be another wire touching the two wires connected to either side of the Main fuse specifically if a bare wire is touching a bare part of either of these two wires. You could rule out the wire running to the Heater fuse by pulling this fuse and the same thing could be done w/the Defroster fuse. And if the Ignition Switch is the cause then locate the plug just below the output wire (side of the Main fuse closer to the trailing coil) coming from the Main fuse which mates w/the Black wire that feeds this switch.

Using an ohm meter should help you to locate the problem.
sorry about that satch porbably would have made things easier if I had said that in my first post its a non turbo im staying away from FI systems I want the the car to be all motor so my main focus will once i get this problem out the way will be on aero and weight reduction




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