[DeTomaso] indicator light/"overheating"/FI

[P. Rimov]

Assuming the EFI set up is a Ford MASS from 87-93  any cam other than a 
stock cam will cause drivability, idle, WOT and performance problems with 
the ECU unless you piggyback the ECU with tuner. The Stock cam is actually a 
pretty good cam. If you are looking for more performance a set of better 
breathing heads, GT40s, Canfield or AFRs and an intake from a early 5.0 
Explorer are the best approach with the Ford EFI. Also make sure the correct 
MASS, injectors and ECU are being used. Mismatch components can be a real 
pain to trouble shoot.

Cheers

Paul

>
> A little background (cause I want to learn)
>
> Vee-hickle in question: MIata powered by FI 302
>
> The Miata temp gauge was running "stright up" unless I was caught in
> traffic on a hot day - the running about 85% towards hot.
>
> Installed temp gauge (with numbers) and discovered the following:
> "straight up" seemed to be about 160 degrees; the "85% towards hot"
> seemed to be about 195 degrees.  Long trip the car gets 25 mpg and the
> tail pipes run sooty black.
>
> After some reading (I am the FI dummy) hoping to find some clue that
> the FI system would correct for altitude at some point (car came from
> sea level to 7000 ft.) I learned that the Ford FI system will run in
> "cold start mode" as long as the water temp is under 180 degrees.
> Then I remembered the monkey that sold me the car said it never
> overheats. (and the car was "mechanically sorted" -BWahahahahahahaha -
> another story)
>
> Pulled the thermostat - a "180" - and replaced it with a "195" .  Now
> the car runs "85% towards hot" most of the time.  Sometimes the fans
> come on (I can only hear them in the driveway w/ motor off.)
>
> Anyway, some questions:
>
> Will the FI brain "adjust" for altitude?
>
> How much cam is "too much" for this FI system? (the car has issues
> which I attribute to the cam)
>
> Oil temp is running (what I think is a high) 215 degrees - easy
> driving. Won't the oil run much hotter w/ hard driving?  (Unable to
> test on public highways)
>
> thanks in advance.
>
> David in Durango
>
>
>
>
>
> Quoting Christopher Kimball <chrisvkimball at msn.com>:
>
>>
>> That is the one risk, but if the car's not overheating, they're
>> probably working!  Plus, since I have my digital relays timed to run
>>  for 60 seconds after the car is turned off, so once I reach my
>> destination, I can walk to the front and visually check, too.
>>
>> Chris
>> #3846
>>
>
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