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What can be the problem if the injectors of my chana 1000does not give petrol There are feul presure but no injector pulse What gives the pulse is it the computer or can it be the knocksensor

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  • Cars & Trucks Master
  • 76,649 Answers

No power to the injectors, no injector driver (ground side) due to a burned out ECU

Posted on Aug 09, 2017

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Posted on Jan 02, 2017

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freetek
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SOURCE: no pulse at injectors

The normal way that injectors are controlled is via the permanent application (ignition on obviously) to one side of the coil that operates the enclosed piston, and the precisely timed application of ground (negative) to the other side of the coil. The transistors that control this switching under the command of the engine computer are typically contained within the computer itself. Measuring the voltage at the injectors is not productive since the common multimeter is incapable of detecting the very short pulses that activate the coil. Some kind of visual means would be needed to observe this pulse such as an oscilloscope or an engine analyzer equipped with a 'scope.
It's unlikely that all of the switching transistors (or the injectors) have failed simultaneously so either the computer has a problem or there is no fuel being delivered to the fuel rail that feeds the injectors. You should find a pressure regulator that sits between the fuel line coming from the tank that controls the fuel pressure for the injectors. This device seem to be a sore point in many vehicles and can make it appear that the injectors are not working. Many fuel rails have a fitting similar to a tire valve to allow the testing of the pressure being delivered. I would recommend you check this before assuming that the injectors are at fault.  

Posted on Nov 14, 2008

  • 1 Answer

SOURCE: 89 s10 2.5 has fuel and fire injector has power but no pulse

injector pulse is just controlled by the ecm or computer as some would say,u said u replaced wires? did u have a fire or melt wires? ecm is known to go bad on these,had a few of these trucks back in the day.

Posted on Feb 16, 2009

  • 740 Answers

SOURCE: 1993 honda accord 2.2,no injector pulse

This sounds like a main relay problem here is a diagram its located under the dash under steering column its the brownish -orange box in the picture. http://www.tegger.com/hondafaq/mainrelaylocation/7-main_relay_closeup.jpg Good luck and thanks for using FIX YA

Posted on May 15, 2009

roniecon
  • 6826 Answers

SOURCE: i have a 2001 camaro with a 3800 v6 it cranks but

The crank sensor is what pulses the ijectors,and makes the spark,so I would start at the crank sensor.Let me know how you come out.Check for any blown fuses also.Ecm fuse would cause this,but it may be called anything ,so check all fuses.

Posted on Sep 10, 2009

  • 14036 Answers

SOURCE: how do i get to feul injectors

YOU HAVE TO RELIEVE FUEL SYSTEM PRESSURE.REMOVE THE INTAKE MANIFOLD COLLECTOR.REMOVE VACUUM HOSE FROM THE FUEL PRESSURE REGULATOR.REMOVE FUEL HOSES FROM THE FUEL RAIL.REMOVE FUEL RAIL BOLTS AND INJECTOR HARNESS CONNECTORS.REMOVE INJECTORS AND FUEL RAIL AS AN ASSEMBLY.REMOVE INJECTORS FROM RAIL BY PUSHING THEM OUT.REMOVE DISCARD FUEL INJECTORS ORINGS REPLACE WITH NEW ORINGS LUBRICATE NEW ORINGS WITH CLEAN ENGINE OIL.YOU HAVE TO BUY ORINGS FOR FUEL INJECTORS AT THE DEALERSHIP.BESURE TO TAKE OLD ORINGS SO WILL GET THE RIGHT SIZE ORINGS.

Posted on Mar 20, 2010

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1 Answer

What gives the injectors their pule?


with key on there should be battery voltage on one wire at the injector, the other wire is the ground and the ECM grounds the circuit. the cam sensor is the sensor that tells the ECM when to operate the injector to supply fuel to the cylinder. if you have both but no pulse from the injectors it could be the injectors are bad. if your missing the ground then it could be the injector drivers in the ECM.

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Check the grounds from the rear injectors to the computer. On a bank fired system as yours, all 3 injector grounds on each bank splice together before they go into the computer. Check wire continuity from injector to the computer connector with the ohmmeter.

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Starts up but will not stay runing chanced IAC con value thor con scosor new key switch and have 47psi at fuel rail at key on 41psi wen runing will stay runing if i put carb claner inthor body runs fine


Cam position sensor tells computer when to synchronize injector pulse. Have you checked for trouble codes?
Check injector fuse. Injectors should have constant voltage supplied when key is on.
You didn't give year and model. Injectors are pulsed when the engine computer internally grounds an injector. You may need to check injector circuit.

Jan 31, 2014 | Cars & Trucks

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Jaguar xj sport 3.2 no spark or injector pulse


If ECU has crank signal and engine turns over, ECU should give injectors a pulse and trigger the ignition. If not ECU might be bad. You should check power and grounds going to ECU. There are usually multiple power and grounds going into ECU

Jan 06, 2014 | Cars & Trucks

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I have a 92 Toyota 4runner that I replaced the feul pump injectors and feul line it has spark and feul to the plenum if I squirt feul in the tbody it will start but won't stay running I also have power...


Tough one,Check all the fuses in the underhood box?
Fuse links are there also,pink and green plastic .Best
to check 'em with an ohmmeter just to be sure.Plue if
you remove them to check you can look for corrosion
at the terminals.
If the throttle pos. sensor is at wide open throttle the
injector pulse will be disabled. Could be the tps,
Hate to think the ECM is at fault,(like 250.00) but it
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Mar 16, 2013 | Cars & Trucks

2 Answers

My fiat uno 1993 model,Cuts out and struggles to get petrol through,I have replaced the feul filter.


Just check,
  • fuel pipe
  • fuel pump ,fuses, wiring
  • if mpfi engine, check the injectors.
  • spray some fuel line cleaners into fuel line, pcv, air filter
  • pls vote!!

Sep 24, 2011 | Fiat 500 Cars & Trucks

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Car not getting feul feul filter and feul pump ok on a 2002 chevy cavalier 2.2l engine


msot likely no injector pulse usually abad crank sensor located by bottom pulley

Feb 14, 2011 | Chevrolet Cavalier Cars & Trucks

1 Answer

I have a 2001 camaro with a 3800 v6 it cranks but wont start. no feul and the injectors are not firing. i can jump the feul pump relay and get feul pressure but the injectors will not fire.


The crank sensor is what pulses the ijectors,and makes the spark,so I would start at the crank sensor.Let me know how you come out.Check for any blown fuses also.Ecm fuse would cause this,but it may be called anything ,so check all fuses.

Sep 10, 2009 | 2001 Chevrolet Camaro

2 Answers

No pulse at injectors


The normal way that injectors are controlled is via the permanent application (ignition on obviously) to one side of the coil that operates the enclosed piston, and the precisely timed application of ground (negative) to the other side of the coil. The transistors that control this switching under the command of the engine computer are typically contained within the computer itself. Measuring the voltage at the injectors is not productive since the common multimeter is incapable of detecting the very short pulses that activate the coil. Some kind of visual means would be needed to observe this pulse such as an oscilloscope or an engine analyzer equipped with a 'scope.
It's unlikely that all of the switching transistors (or the injectors) have failed simultaneously so either the computer has a problem or there is no fuel being delivered to the fuel rail that feeds the injectors. You should find a pressure regulator that sits between the fuel line coming from the tank that controls the fuel pressure for the injectors. This device seem to be a sore point in many vehicles and can make it appear that the injectors are not working. Many fuel rails have a fitting similar to a tire valve to allow the testing of the pressure being delivered. I would recommend you check this before assuming that the injectors are at fault.  

Sep 08, 2008 | 1994 Isuzu Rodeo

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