Why does my GMC Sierra 1500 stop running?
If you have spark with no pressure it is the pump. Halfway through 1998 GMC switched to a new fuel pump style. The older model has steel lines coming off of the top of the pump to the frame rail and then connects to the frame steel lines with short hoses, you’ll need line wrenches and the ability to curse.
Can a Chevy C / K 1500 run without fuel?
Also I haven’t fully checked the Spark, but the Truck run’s fine when you spray Starting fluid into the Throttle body. Any suggestions on why the truck isn’t accepting the fuel, it cranks fine, just wont run without starting fluid. these trucks have to have between 55-65psi of fuel to run.
What kind of fuel pump does a Chevy Silverado need?
It turned out the pump I put in was for a 96 C1500, which has a throttle body system and the pump only produced 20-30psi. The Fuel injection in the Silverado needs 55-65psi. Be very careful you didn’t put the wrong fuel pump in!!
What kind of truck is a 96 Chevy?
– CarGurus 96 Chevy C1500 5.7L Vortec Truck won’t start, Replaced Fuel Pump, Filter & Has Spark.
What kind of fuel injection does a GMC use?
Back in 1992, General Motors introduced a new type of fuel injection system known as “Central Port Injection” (CPI), which GM also refers to as “Central Multi-point Fuel Injection” (CMFI). The system was used on 4.3L V6 Vortec engines through 1995, and was redesigned in 1996 and renamed “Central Sequential Fuel Injection” (CSFI).
How is fuel delivery controlled in a GMC Truck?
The powertrain control module (PCM) estimates air flow using inputs from the MAP sensor, throttle position sensor, temperature sensor and engine speed. Fuel delivery is controlled by pulse width modulation. The PCM varies the on-time or dwell of the MAXI injector to control the air/fuel mixture.
How can I tell if my GMC Truck has a hard start?
The first step in diagnosing a hard start or no start on a GMC or Chevy truck with one of these systems, therefore, would be to check fuel pressure. If fuel pressure is less than the KOEO specification, you need to test the fuel pump and its voltage supply circuit.
When did Vortec start using CSFI fuel injection?
The system was used on 4.3L V6 Vortec engines through 1995, and was redesigned in 1996 and renamed “Central Sequential Fuel Injection” (CSFI). The system was also added to 5.0L and 5.7L Vortec V8 engines.