Got an 05 Ranger that often won't start in the blazing sun, even when the vehicle sits for hours / days and the engine is cool. On a cloudy day or in cooler weather there's no problem. Is there a sensor either inside the truck or under the hood that would trigger the engine to just turn over & over and not start after sitting in direct sunlight on a hot day?
maybe the fuel pump doesn't like to get warm
I've wondered if it's fuel pump related. In the past when I've been temporarily stranded, I've raised the hood for air circulation and after about a half hour when the heat dissipates it will start. I'm thinking it's something under the hood, but maybe I'm sub-consciously fearing a fuel pump issue as it's a major job to replace on a Ranger.
that's a good clue. Maybe it's fuel injectors, or maybe even the electronics. Heat makes things expand.
Time to do some diagnostic investigation. Check for spark, EFI signal etc.
Had a mechanic run a diagnostic on it but he said nothing came up. Seems to injector related as it appears to be starved for fuel while turning over.
I'm not talking about just plugging in a scanner.
I mean getting actual visual confirmation of each spark plug and injector condition and operation
Got it - thanks. I'll look into getting it done.