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No starting in hot weather

I have a 92 Honda Civic which refuses to start in hot weather. If I park it in the shade it starts just fine. This is an intermittent problem which of course doesn’t occur when I take it to the shop. An ex Honda parts rep. informed me the problem is known as “heat soak” but could not recall the fix for the issue. Any suggestions?? Besides looking for a shady spot to park.

This is a classic Honda problem for cars of that era. There’s a main relay under the dash that doesn’t work when the interior gets hot. It’s called a PGM-FI relay or something close to that.

Honda’s have a history of not starting when the interior of the vehicle gets hot. This is caused from a defective main fuel pump relay. The relay is located behind the dash, above the drivers left knee.