2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Rx7 Fouling Plugs?

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Old Oct 28, 2004 | 07:33 PM
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jeremie pryor's Avatar
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From: Bowling Green Kentucky
Rx7 Fouling Plugs?

is it easier to foul plugs in a rotary engine? i have been having starting issues so i would crank the motor silly. then think maybe the motor was flooded, so i would remove the fuel injection fuse, crank it a little to get the fuel out of the motor, then go over the same procedure. i did this about five or six time. you think the plugs are shot at this point? it won't start now--jeremie
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Old Oct 28, 2004 | 07:47 PM
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Kingofl337's Avatar
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From: Manchester, NH
Pull the plugs and check if they are fouled
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Old Oct 29, 2004 | 01:27 AM
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they look fine to me, but then again i don't really know what they are suppose to look like fouled--jeremie
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Old Oct 29, 2004 | 02:42 AM
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From: n
I think you should look into why the motor is flooding in the first place.
Low compression comes to mind...

To confirm if the spark plugs are fouled, pull the spark plugs and put them back into the spark plug wires.
Ground the outside threads of the spark plugs onto a known good ground point - the strut tower studs are a good place for this - pull the rubber cover of the front struts to access them.

Now, find a way to kill the fuel pump - pull ENGINE fuse, pull fuel pump connector on the rear shock tower, or pull the fuel pump relay on the steering column.
If you're lucky, you have a fuel pump cut-out switch, and you can just use that.

With the fuel pump off, crank the engine over.
It would help to have a friend to watch the spark plugs.
Do they spark?


-Ted
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Old Oct 29, 2004 | 02:38 PM
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From: Bowling Green Kentucky
if they are fouled will they not fire at all or will they fire weak?
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Old Oct 29, 2004 | 07:24 PM
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From: n
Either or...
If they are weak firing, they will eventually clean themselves up if you can get the engine to run - if you flood them again, this is usually enough to kill them for good.
If they don't fire, they will need to be replaced.


-Ted
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