95 Buick Regal will not crank when engine warm wait 20 or so minutes and it will crank what causes this issue.?

Sounds like the fuel pressure regulator. if you have access to a pressure guage check the pressure when it will not start.

check all your fuses and your coil/coils, could be your alternator. check your distributor cap also, points, tightness, etc.

1995 Buick Regal 3.8 liter V-6 VIN "L"



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I would replace the crankshaft ignition pickup (Crank position sensor)

Your vehicle uses the coolant temp sensor and the intake air temp sensor to determine the engines temperature on a cold start. If one of them is dramatically different than the other it will flag a code.

Is the check engine light on?

When was the last time you had a tune-up? if recently what brand of plugs where used?

Have you noticed any hard start issues after a hot soak? A hot soak would be driving the car until fully warmed up, shutting of the engine for approximately 15 to 20 minutes, and then starting the engine again.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

buy the starter, and use it to find the old one usually only takes 20 to 30 min, i did it in 110 degree weather and it was my first time ever doing it

Crank sensor may be your problem.

egr valve is not opening up when the engine reaches it normal operating temperture

The ignition switch on that model is rated @ 50amps. When I was driving my 2001 Regal LS (at 120,000 miles) and used the turn signal, the engine would die, when I switched the turn signal off, the engine ran. So I replaced the ignition switch, and all is well.

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test the EGR valve.