Car cooling issues? maybe?

Where is your air temp sensor located? Know what it is reading when it goes lean and if you do, does it make sense?

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Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.

yea it reads about ambient temps.

well, after sitting in the shade for an hour its fine again.

What i noticed is, there is a sound change in the pumps. When its doing this crap, the pumps don't sound loaded. When it cools down you can hear the whine change as its builds head pressure. Meaning there is some issue with the pump configuration under high heat conditions.

Only thing i can figure is the external pumps, which are above the tank due to the nature of the tank location, and are under a bulkhead then under a large glass hatch so that the thing becomes an oven and vapor lock is occuring in the pumps since the fuel doesn't have a natural flow to them.

not sure how to fix this outside of lift pump

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First Rally: 2010 First RallyX: 2004 (a bunch)
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Last Updated, Apr 9, 2023

Oh yeah, that's a big possibility then. Dunno about yours, but on mine the fuel gets hot enough that the level gauge starts reading about 10% too high (expands that much? maybe?) and the fuel pump (mounted stock location under the driver's butt area) starts screaming and the car runs lean.

Started. It doesn't now. I did a lift pump/surge tank arrangement that I don't think you're allowed to do since it may be considered a second fuel tank even though it's only maybe 750ml. But my fuel problems are gone, gone, gone. Finally. The damage was done to that old fuel pump though so a new one went in because reliability.

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Pete Remner
Cleveland, Ohio

1984 RX-7 (rallycross thing)
1978
Silence is golden, but duct tape is silver.



Edited 2 time(s). Last edit at 07/03/2013 05:12PM by Pete.