Why is there no pulse from the injector?
Used all original electronics and tbi. New wires, plugs, cap, rotor, fuel filter,etc… have spark, have fuel at the back of the tbi. No pulse at all from either injector?
What kind of signal does a GM injector pulse have?
Purple/white wire with key on had barely any signal at all. Wires to the injectors have 12v with key on. I have fuel at the rear of the tbi but not sure of the pressure?
Where is the injector pulse on an ECM?
Okay ecm fires injectors with ground…should have a set of ground wires at thermostat..and one on intake behind where ac pump is or should be. Make sure clean and connected tight.
What kind of meter do I need for injector pulse?
I pulled the four pin connector from the dist. all I have is a standard radioshack volt meter. Purple/white wire with key on had barely any signal at all. Wires to the injectors have 12v with key on. I have fuel at the rear of the tbi but not sure of the pressure?
Purple/white wire with key on had barely any signal at all. Wires to the injectors have 12v with key on. I have fuel at the rear of the tbi but not sure of the pressure?
Used all original electronics and tbi. New wires, plugs, cap, rotor, fuel filter,etc… have spark, have fuel at the back of the tbi. No pulse at all from either injector?
Okay ecm fires injectors with ground…should have a set of ground wires at thermostat..and one on intake behind where ac pump is or should be. Make sure clean and connected tight.
What was the ignition module on a 1993 GMC k1500?
1993 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a no-start problem caused by the ignition module, or the ignition coil, or the distributor pickup coil. Wiring diagram. Component pin outs.
What causes a GM pick up to not start?
The one symptom that’s gonna’ be staring you right in the face is your GM pick up or van or SUV cranking but not starting. More specifically, you’ll see one or all of the following symptoms when the crank sensor fails: No spark from all of the Coil-On-Plug Ignition Coils.
What kind of engine does the GMC Envoy have?
The Envoy was Motor Trend magazine’s Sport/Utility of the Year for 2002. The 4200 Vortec 4200 engine I6 engine was named one of Ward’s 10 Best Engines from 2002 to 2005.
When did the GMC Envoy replace the Chevy Blazer?
In line with the Chevrolet Trailblazer replacing the Chevrolet (S-10) Blazer, the 2002 Envoy replaced the GMC Jimmy five-door. The Envoy was Motor Trend magazine’s Sport/Utility of the Year for 2002.
What kind of differential does a GMC Envoy have?
Owners can opt for the automatic rear locking Eaton differential or a standard rear Posi-trac LSD. The 4L60e routes power to the back with rear differential gears varying from 3.23-3.42-3.73-4.10. Twintube Bilstein shock absorbers dampen the IFS up front and the 5-link coil sprung rear solid axle or opt for GM’s Auto-ride air suspension.
Is there a spark from the fuel injector?
No spark from all of the Coil-On-Plug Ignition Coils. No fuel injector pulses from the fuel injector connectors as tested using a Noid Light.
What was the problem with my Chevy c1500?
Thanks It’s also got the new cap and rotor lol Replace oil pressure switch – (sending unit). You are the f***in man pushrod. The oil pressure switch was the problem. Thank you for sharing your knowledge and experience. you did change the ignition control module.cranks over but no start,correct.
The one symptom that’s gonna’ be staring you right in the face is your GM pick up or van or SUV cranking but not starting. More specifically, you’ll see one or all of the following symptoms when the crank sensor fails: No spark from all of the Coil-On-Plug Ignition Coils.
How to know if your engine has no spark?
First Confirm Your Engine Has No Spark. 1 Disable the fuel system by removing the fuel pump fuse or relay. 2 Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. 3 Finally, Have someone crank the engine and watch for spark.
How to test the wiring on a fuel injector?
How to Test Injector Wiring 1 Electrical Short Testing. Disconnect all the fuel injector electronic plugs on the engine. 2 Voltage Testing. Turn the ignition key to the “On” position. 3 Fuel Injector Resistance Testing. Turn the multimeter to “Ohms.” Place the multimeter leads into the fuel injector plug terminal. …
How many volts should an injector wire be?
Step 5: Repeat with all injector wiring harnesses. Leave the ground lead in position and test all of your injector wiring harnesses. They should all be around 12 volts. A lower reading means there is excess resistance in the wire somewhere.
What does it mean when there is no injector pulse?
In case of that, there is no injector pulse or spark, this means that is your ECU has failed in operating in this case you have to get your ECU changed or visit an expert. You May Like: Low Fuel Light Comes on When Tank Is Full Causes and How to solve it Question: What controls the fuel injector pulse?
How does the engine control unit control the injector pulse?
Question: What controls the fuel injector pulse? Ans: The engine control unit is the electronic brain that used to control the fuel injector pulse by gathering data from various sensors along the fuel line
Can a fuel injector not receive the correct voltage?
It is possible for the injector to cause issues even if it is receiving the correct voltage. They can clog up, which will decrease the spray inside the cylinder. This, in turn, causes the fuel to not burn completely and will create a misfire.
How can I find the correct resistance for my fuel injectors?
Tip: You can find the correct resistance for your injectors by searching online or in your vehicle’s repair guide. Step 1: Turn the car on. Turn the key to the second (ON) position for this test. You want battery power flowing, but don’t want the engine running. Step 2: Set up DVOM to measure DC voltage.
Can a PCM loose all 6 injectors at once?
The PCM is set up so that it has individual injector drivers, Meaning that you could loose 1 or 2, but loosing all 6 at one time is very unlikely. Injectors do run off both crank and cam sensors, but mostly off the cam. And when the cam sensor does fail, The PCM goes into default mode, using the last stored run.