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Old 12-08-2010, 07:56 PM   #1 (permalink)
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Does 1990 Miata (manual) have DFCO?

Just curious if my 1990 Miata (manual trans) has DFCO and at what RPM it would engage. I'm testing EOC and like it (except that the check valve is missing to my brake booster which makes braking a little too exciting for the moment).

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Old 12-09-2010, 02:45 AM   #2 (permalink)
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Drive along at 3000rpm in 3rd gear. Take your foot off the gas and you will slow down. If the deceleration stops or significantly slows down at some RPM (around 1300rpm +- 500) you will have found the point at which DFCO is disengaging.

If you have Fuel injection it is likely you have DFCO.
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Old 12-09-2010, 11:32 AM   #3 (permalink)
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Quote:
Originally Posted by bestclimb View Post
Drive along at 3000rpm in 3rd gear. Take your foot off the gas and you will slow down. If the deceleration stops or significantly slows down at some RPM (around 1300rpm +- 500) you will have found the point at which DFCO is disengaging.

If you have Fuel injection it is likely you have DFCO.
or you could try 1st gear if you're not sure, then you'll REALLy know, lol! Just don't try to do it whilst drinking a hot beverage...
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Old 12-09-2010, 01:44 PM   #4 (permalink)
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Thanks. I tried noth methods but there was no perceptible change inthe deceleration rate ineither instance. Guess i don't have it.

Appreciate the responses!

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