Runs good for 20 minutes, then dies and won't start until the next day

[whoaskew]

I am sick of my truck leaving me stranded.

It is a 1991 C1500 2wd, ext cab, short bed 5.7L engine with about 300k miles on it that I have had for a year. Supposedly a different 350 engine and transmission was put in a couple years ago.

This problem has been going on for 2 weeks. I'll start the car up and it runs just fine, no problems. After driving for about 20 minutes, the engine will die while driving, and will not start back up until the next day. I have sat in the car for literally 4 hours patiently waiting for it to start. I'll turn the key and the engine will rotate, but will not start. When someone shows up to give me a jump after the battery gets low, it will not start. I'll go home and go to sleep, and sometime the next day I'll go to my truck, and it will start back up, and I'll drive back home, and I'll make it as long as it takes less than 20 minutes.

It is not just a "morning problem", but a "first time I have started the truck that day" kind of problem. Last week, it happened to me in the mornings. On Saturday, I didn't leave my house until 2pm and the problem happened. Today, I first drove it at 8pm, and the problem happened.

Things I have changed so far (mostly from Autozone):

Starter - burnt it out when it first died 2 weeks ago, now I know not to crank when below 9 volts - lifetime warranty

Spark plugs - no more engine popping or driving with 2 feet - changed last week on Tuesday - AC Delco CR43TS gapped at .035

plug wires - changed all in November, since I noticed one of the old ones was tore - lifetime warranty

Distributor cap and rotor - changed last month when the engine started popping - autozone

Ignition control module- I changed today, I really thought that would fix the problem after speaking with the Autozone guy - lifetime warranty

Ignition Coil - changed last month because of popping

Fuel Filter - changed last Thursday, thinking it was a fuel problem



Here are some of the other symptoms I have been noticing over the last couple months:

Pretty bad gas mileage, I know it is a V8, but it is just as thirsty when I am not carrying anything as when I am pulling a car

A couple months ago, after driving for about 30 minutes or so, the engine would make a "Pfft" noise and would start popping and I would have to drive with 2 feet to keep the engine running.

[MT-2500]

Originally Posted by whoaskew

I am sick of my truck leaving me stranded.

It is a 1991 C1500 2wd, ext cab, short bed 5.7L engine with about 300k miles on it that I have had for a year. Supposedly a different 350 engine and transmission was put in a couple years ago.

This problem has been going on for 2 weeks. I'll start the car up and it runs just fine, no problems. After driving for about 20 minutes, the engine will die while driving, and will not start back up until the next day. I have sat in the car for literally 4 hours patiently waiting for it to start. I'll turn the key and the engine will rotate, but will not start. When someone shows up to give me a jump after the battery gets low, it will not start. I'll go home and go to sleep, and sometime the next day I'll go to my truck, and it will start back up, and I'll drive back home, and I'll make it as long as it takes less than 20 minutes.

It is not just a "morning problem", but a "first time I have started the truck that day" kind of problem. Last week, it happened to me in the mornings. On Saturday, I didn't leave my house until 2pm and the problem happened. Today, I first drove it at 8pm, and the problem happened.

Things I have changed so far (mostly from Autozone):

Starter - burnt it out when it first died 2 weeks ago, now I know not to crank when below 9 volts - lifetime warranty

Spark plugs - no more engine popping or driving with 2 feet - changed last week on Tuesday - AC Delco CR43TS gapped at .035

plug wires - changed all in November, since I noticed one of the old ones was tore - lifetime warranty

Distributor cap and rotor - changed last month when the engine started popping - autozone

Ignition control module- I changed today, I really thought that would fix the problem after speaking with the Autozone guy - lifetime warranty

Ignition Coil - changed last month because of popping

Fuel Filter - changed last Thursday, thinking it was a fuel problem



Here are some of the other symptoms I have been noticing over the last couple months:

Pretty bad gas mileage, I know it is a V8, but it is just as thirsty when I am not carrying anything as when I am pulling a car

A couple months ago, after driving for about 30 minutes or so, the engine would make a "Pfft" noise and would start popping and I would have to drive with 2 feet to keep the engine running.

When it quits check for lose of fuel pressure or lose of spark.
Let us know what it is losong when it quits.