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steven evans
steven evans Posted on Apr 06, 2019
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Hundai sonata 2005need to know here the pulse ground is on the ecm for the coils and injecters

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Larry Ng

Larry Ng

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  • Hyundai Master 14,591 Answers
  • Posted on Sep 30, 2022
Larry Ng
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Joined: Apr 07, 2013
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No engine told and they are never all the same .
the service manual covers all that, for sure, buy it.
or play here as I DO

https://eautorepair.net/Marketing/Default.asp

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jan 08, 2009

SOURCE: 1991 chevy camaro 3.1

Mine had a similar problem, there is a wire that goes from the computer to the fuel rail and this wire sends info on how much fuel and when to inject the fuel... if that wire is grounding out then this will cause the lack of cylinders to fire and also explain the inconsistency. So i would start with the fuel rail..hope this is of some help

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Anonymous

  • 366 Answers
  • Posted on Feb 28, 2009

SOURCE: I need help finding where to replace the coolant sensor(locate)?

usually there near thermostat housing,locatednear top side of motor,

Anonymous

  • 62 Answers
  • Posted on Feb 20, 2010

SOURCE: Replace 2004 Hundai Sonata Door Lock Actuator?

take all screws of ,,then take screws of actuator and cables then remove it ,,put in new one put everything back together

Anonymous

  • 20 Answers
  • Posted on Feb 22, 2010

SOURCE: no start chrysler voyager

so you have no drivers for the injectors.... every thing is connected, no shorts..... the main thing that comes to mind is the computer....

Anonymous

  • 1874 Answers
  • Posted on Feb 20, 2011

SOURCE: i have a 1990 jeep

The best idea is to pull out all Diagnostic Trouble Codes (DTC) from Engine Control Module (ECM). Trouble codes can be displayed by the Malfunction Indicator Lamp (MIL) or by using diagnostic equipment connected to the data link connector (DLC) of the vehicle.

tdisline_293.jpg
Accessing:
1. Within 5 seconds switch ignition ON-OFF-ON-OFF-ON.
2. Count MIL flashes. Note trouble codes.
3. Each trouble code consists of two groups [A] in the figure below.

tdisline_294.jpg
4. The first group of flashes indicates the "tens" of the trouble code.
5. The second group of flashes indicates the "units" of the trouble code.
6. A short pause separates "tens" and "units" [B] in the above picture.
7. A long pause separates each trouble code [C] in the above picture.
8. For example: Trouble code "21" displayed in the above picture.
9. End of test sequence indicated by trouble code "55".
10. Trouble codes can also be displayed by the Malfunction Indicator Lamp (MIL) or by using diagnostic equipment connected to the data link connector (DLC) of the vehicle.


Erasing:

NOTE: Disconnecting battery earth lead may cause driveability problems until the engine management system relearns basic values!

1. Ensure ignition switched OFF.
2. Disconnect battery earth lead for at least 30 seconds.
3. Reconnect battery earth lead.
4. Repeat accessing procedure to ensure no trouble codes remain in ECM fault memory.

NOTE: Disconnecting battery may erase memory from electronic units (e.g. radio, clock).

NOTE: Trouble codes can also be erased by using diagnostic equipment connected to the data link connector (DLC) of the vehicle.

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0helpful
1answer

Is there a relay for the injectors on a 2005 Nissan Titan and if so where is it located? Is it internal in the IPDM like the fuel pump relay or is It external?
There is no relay for the injectors. Fuses 54 & 55 in the IDPM supply power to the injectors with the ignition switch in the on or start position, the ECM - engine computer turns them on by supplying a ground in a pulse width modulation .

SYSTEM DESCRIPTION The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the ECM memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air flow sensor.

Definition of Fuel Injector Pulse Width (liveabout.com)
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Jul 17, 2023 • Nissan Cars & Trucks
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Hyundai sonata 2006 no injection pulse there's spark to plugs
Is there an RPM signal reading on the scan tool when the car is cranking? If there's no RPM signal, it's likely there's a problem with the crank sensor or cam sensor. An RPM signal usually indicates the two are good.

If you're getting an RPM signal, I'd back probe the injectors, and look into confirming you have good supply voltage, and a steady 12V on the injector control wires. I'm assuming the injectors are switched on by the computer ground.

If the voltage stays low or remains at 0v on the control wires, you have to look further into the circuit feeding the injectors. A wiring diagram would be best.
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Aug 11, 2022 • Hyundai Cars & Trucks
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What grounds the coils
The ignition module in the distributor normally handles this job as it controls the current flow through the coil.
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Apr 26, 2014 • 2000 Hyundai Sonata
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Weres the ground for injector circuit in 1996 2.4 quad 4
For fuel injection, usually the ground is inside the engine computer. The computer grounds the circuit for a split second to pulse the injectors. When key is on, the injector circuit has constant power to the injectors. When the computer grounds the circuit internally, the injector coil is energized, or pulsed.
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Aug 01, 2013 • 1996 Chevrolet Cavalier
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1993 chvy lumina...no communication with scan tool...no injection pulse...have good spark and fuel pressure...have changed ignition mudule, ecm, and crank sensor have power at main wire at coils..all fuses...
there is a fule psi. switch remember for fuel injection systems
the psi. has to be high or it could be bad
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Nov 01, 2012 • Chevrolet Cars & Trucks
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98 toy sienna no spark no injector pulse coil and injectors have b+ but they have no ground signal
Dont worry about injection the rule of the is the same, correct for spark and establish it and fuel will come for spark you will need to trouble shoot CKP(cranksensor) and your ICM . The crank sensor is a alernating wave form and the ECM will only see its tope voltage and frequency or RPM, If the signal doesnt generate a good healthy signal ,your ECM will not give fuel injection pulse. The second problem you may be faced with ICM ,this include the Ignitor, its at the left strut tower, for now no spark I would start he trouble shoot at the cranksensor this include the terminalonnection and the toner wheel itself
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May 04, 2011 • Toyota Sienna Cars & Trucks
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Turns over but wont start i got fire and fuel to the fuel rail but the injecters are not delivering fuel any ideas whats wronge
sounds like u got no injector pulse comin from ecm.we need to pull ecm codes an review them ,possible camshaft sensors faulty they usually provide reference pulses to ecm for injector firing or pulse.without this pulse ur injectors will never open up to let fuel enter combustion chamber. one way of checking pulse is to connect a noid light(small light bulb that plugs in injector pigtail to chek for power to injector and ur pulsing ground coming from ecm to injector) an test for a blinking light while cranking engine.
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Apr 08, 2011 • 1998 Ford F150 Regular Cab
1helpful
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Mazda MPV 2.6 1989 good ecm, good injectors (but no voltage), good spark, good fuel pressure, engine cranking, but won't start. If I put a little bit of gas on the air intake it will start. there's no...
You probably have a bad ecm. These engines used the same ecm that the injected b2200 used and they had a lot of problems with capacitors that leaked and damaged the etching on the ecm's circuit board. If you do indeed have 12V on one side of the injectors and no pulsing ground from the ecm, then the problem either in the ecm or the wiring between the ecm and the injectors. When you say good ecm, have you tried a known good one?
If you're really good at desoldering and repairing pc boards, you can fix it yourself, all you'll need is a 47uF capacitor. Or you can send it out.

http://www.avproecm.com/mazda.htm
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Jan 11, 2011 • 1989 Mazda MPV
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2001 Daewoo Lanos Fault 63.58X 'B'
DTC 63 Will Set When
 No voltage is supplied by the ECM through the EST “B” line while reference pulses are received by the ECM from the crankshaft position sensor
check white wire terminal B on ignition coil to ECM terminal C14 for open circuit or short to ground while disconnected if thats ok check for voltage signal at B while cranking no signal ECU faulty. voltage signal also on A terminal while cranking and check earth terminal C to body no higher than 5 Ohms
power is terminal D 12V
if getting power, earths good, and both signal voltages are going into coil pack, coil pack is faulty.
Read full answer
May 30, 2009 • 2001 Daewoo Lanos
0helpful
1answer

1991 chevy camaro 3.1
Mine had a similar problem, there is a wire that goes from the computer to the fuel rail and this wire sends info on how much fuel and when to inject the fuel... if that wire is grounding out then this will cause the lack of cylinders to fire and also explain the inconsistency. So i would start with the fuel rail..hope this is of some help
Read full answer
Oct 07, 2008 • 1991 Chevrolet Camaro
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