92 S10 Blazer stalls when engine is warm

92 Chevy S10 4x4 4.3L Blazer with Vortec. It starts and will idil for a few minutes or until engine warms up and will stall. It will not crank back over. I have had fuel pump and fuel injection assembly done about a year ago plus numerous sensors replaced. What I understand is the my truck has no temperature sensor. I have losen fuel filter to see if fuel is gettin through and it is.

Thank-you,
Crystal

You should have 2-4 tempt sensors.
Temp Gauge and pcm and air intake to start with.
What engine code?
On fuel pressure you will need to put a fuel pressure gauge on it to check for proper fuel pressure.
Is check engine light coming on or staying on?
How is the base tune up? Base timing?
When it stalls is it lsing spark or fuel pressure or both?
Do you have good hot blue spark to all spark plugs?

What do you mean "crank over". It will crank but not start, or no crank, as in turn the key and nothing?

MT has given you some good suggestions on this, you should make sure you perform some diagnostics first. Assuming its cranking over but no start, when it starts when its cold, is everything alright, then all of a sudden it stalls, or does it struggle, then die out?

When it stalls, pull a plug wire off and check for spark.

Good Luck!

What do you mean "crank over". It will crank but not start, or no crank, as in turn the key and nothing?

MT has given you some good suggestions on this, you should make sure you perform some diagnostics first. Assuming its cranking over but no start, when it starts when its cold, is everything alright, then all of a sudden it stalls, or does it struggle, then die out?

When it stalls, pull a plug wire off and check for spark.

Good Luck!


I have a 4.3L W CPI And yes she's cranking and no turn over..sorry don't know all the technical automotive vocabulary..she idils great,no missing sounds or spit/sputters...when all this started I could drive her about a mile or so and then she would stall and not start back up.BUT I did notice when she stalled at the time she wouldn't give me NO warning as in the engine light or any warning lights,the only way I knew she had stalled is when I would give her gas and be going no where!.so I've had to have her tolled 3 times..seems like if I'd wait a few hours or try her the following day she would fire right up and then she does it all over again. When I had the fuel pump and fuel injection assembly done a year ago the preassure was set at 60.

Thank-you,
Crystal

I have a 4.3L W CPI And yes she's cranking and no turn over..sorry don't know all the technical automotive vocabulary..she idils great,no missing sounds or spit/sputters...when all this started I could drive her about a mile or so and then she would stall and not start back up.BUT I did notice when she stalled at the time she wouldn't give me NO warning as in the engine light or any warning lights,the only way I knew she had stalled is when I would give her gas and be going no where!.so I've had to have her tolled 3 times..seems like if I'd wait a few hours or try her the following day she would fire right up and then she does it all over again. When I had the fuel pump and fuel injection assembly done a year ago the preassure was set at 60.

Thank-you,
Crystal

When it stalls you need to check for loose of spark or fuel pressure and or injector pulse..
Check for good hot blue spark to all plugs.

IGN MODULE AND PICK UP COIL AND COIL ARE WEAK SPOTS.

Also older pcm are weak spots.
When it quits or warms up drop pcm and twist or give it a tap test and see if engine stalls or acts up.

Check that fuel pressure when it quits to.

Thank-you for all ur help/advise....I can't put anymore money in her!! I have her for sale...all this gives me a headache..everytime I turn around its something else with this Vortec engine!! Worse than my fricken harley..U all have a great day/evening...again Thank-you for all ur help.

Crystal