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hard start after hot soak

5932 Views 14 Replies 8 Participants Last post by  greenfuel
I'm new to the site so I apologize if I'm asking a question that has already been answered.
I have a 1988 F-250 with the 7.3 IDI. It starts ok in the morning or any time it's cold but after it has been driven and then shut off for 30 minutes or so, it almost runs the batteries down getting started. Once it starts, it doesn't sputter or anything. It runs good. Anytime the "wait to start" light doesn't come on I know it's going to be hard to start. If the light does come on, it will start ok. When I say ok, it doesn't just jump to life but it starts after a few seconds of turning over. If I try to start immediately after shutting it off it starts right up quickly. So far I've had the lift pump, injector pump, glow plugs, control module, relay, injectors, return lines and caps and starter replaced. Should my "wait to start" light always come on when starting or just until it warms up enough? Could this be a lack of compression?
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My wait to start light doesn't come on at all when the motor is hot. Is there anything that actually gets a signal from this light like a fuel solenoid? I really feel like it's a fuel delivery problem. The starter turns over really good and fast. If it was the IP, would it have other symptoms? I'm going to try squirting some fuel into the air intake and see if it hits. I was told that ether would damage my glow plugs. Wouldn't that tell me if it is a fuel delivery problem? This is my first diesel by the way.
I'll try it today. Thanks
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