Car sputters when warm I have to let off the gas for it to get back to normal

Tiny
ROGER DALE PYBURN
  • MEMBER
  • 1995 CHEVROLET BLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 222,000 MILES
Starts up good when it warms up act like it's getting too much fuel. Sputters and stalls sometimes just doesn't run right.
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Sunday, February 21st, 2021 AT 9:06 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

It is very possible that it is getting too much fuel. By chance, is there any black smoke from the exhaust? That would indicate a rich fuel mixture.

As far as the fuel pressure, I suggest checking it to see if it falls within the manufacturer's specs. First, here is a link that shows in general how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here are the directions specific to your vehicle. They include the specifications.

__________________________

1995 Chevy Truck S10/T10 Blazer 4WD V6-262 4.3L VIN W CPI
Fuel System Pressure Test
Vehicle Powertrain Management Fuel Delivery and Air Induction Fuel Pump Fuel Pressure Testing and Inspection Component Tests and General Diagnostics Fuel System Pressure Test
FUEL SYSTEM PRESSURE TEST
A fuel system pressure test is part of several of the diagnostic charts and symptom checks. To perform this test, follow this procedure:

1. Turn engine "OFF" and relieve fuel pressure following above procedure.
2. Connect fuel pressure gage to fuel pressure connection tap. Wrap a shop towel around fitting while connecting gage to avoid spillage.
3. Connect negative battery terminal.
4. Start engine and observe fuel pressure reading. It should be 400-440 kPa (58-64 psi). If not, refer to Computers and Control Systems / System Diagnosis / Chart A-6. See: Computers and Control Systems > Testing and Inspection
5. Turn engine "OFF" and relieve fuel pressure procedure.
6. Remove fuel pressure gage.
7. Reinstall fuel pressure connection cap.
8. Reconnect negative battery terminal.
9. Start engine and check for fuel leaks.

___________________________________

Do this and let me know what you find or if you have other questions.

Take care and God Bless,

Joe
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Tuesday, February 23rd, 2021 AT 5:52 PM

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