[Miata] 1991 Miata Running/Starting/ Check engine light?

[Ken Bogart]

It could also be the ignition switch. Wiggle the key and see if the
light comes on.


On 8/30/07, James Thorusen <entropycat at verizon.net> wrote:
> Hi Charlie!
>
>   Keith is correct.... your problem is most likely a loss of power to the
> ECU (which drives the check engine light).   I would replace the "main
> relay" on general principles.... if that turns out not to be the problem,
> then you will have a spare.   I would also crawl into the passenger's
> footwell and remove the connector from the ECU and spray it with a good
> contact cleaner / restorer such as De-Ox-It or Cramolin.   I would also use
> contact cleaner on the relay socket before installing the new relay.
>
> Good Luck,
> Jim T.
> entropycat at verizon.net
> '74   914
> '90   Miata  (x3)
>
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