Question about Metra Chevy Truck 88 94

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I have a 88 chevy truck with a 4.3 and only one injector is firing I have put a volt meter to it and i have power on both hot sides but still only one fires i switch the wires from the two injectors and it just switch witch one was working

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Then the injefctor is defective, or did I miss something here? these do fail, it is not that uncommon on the Vortec 4.3

Posted on Jul 27, 2009

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90 k5 blazer i dont have any power at map sensor, throttle position sensor, and the injectors will not fire. i have preasure but no injector fire. could anything in the column cause this


can you check to see if the ecu is getting power. i dont have the wiring code to hand, but remove the battery and unplug the ecu. then put battery back on and turn ignition on, with a meter or a 12 volt bulb with a wire conect to earth and the other end to connections on the ecu plug you should get 4 or 5 lives. if that all works try the ground wires to the shell follow the ground wire from the battery to the shell check and clean these.

Jun 09, 2017 | Chevrolet Blazer Cars & Trucks

1 Answer

Hi. I have 2006 VW Jetta 2.0 TDI .I don't know why my car injectors socet hasn't got power electric? I changed Crankshaft sensor I changed camshaft sensor I changed injectors wiring harness.


Those sensors wouldn't affect power to the injectors.

You need a voltmeter, it's an electrical problem, so you need a digital volt/ohm meter (DVOM), or also called a multi-meter, and digital because many car circuits that are computer related operate at very low voltages or power demands, from milliamps to thousands of volts, like the ignition delivers to the spark plugs. So you buy a cheap multi-meter, then you also need a wiring diagram for your car to see how the fuel injector circuit works. but start there where you plugged in the new injector harness.

You are looking for power to the injectors, with key on. The injector harness has 8 wires; each injector has a power wire and a ground wire, so 4 of the wires in the harness should have power. At least on most American cars, the injector works by having the ecm control the ground for the injector . The power is constant. It is only when the ecm momentarily internally grounds the injector circuit that the injector fires. On your VW, the injector power wires and ground wires both go to the ecm.

Nov 25, 2016 | Volkswagen Jetta Cars & Trucks

1 Answer

Ok on my 98 Chevy s10 I've pin pointed down to the


If you can make the injector click without cranking the engine, the injector ground circuit is bad, probably the computer.
If the injector only clicks when cranking, the ground circuit is working right, so the problem is with the injector drive circuit. There should be a fuse for the injectors in the power distribution box by the battery. Have you checked for that? Also check for power to the fuse with key on. Use a testlight or voltmeter to check for power.

Nov 08, 2012 | Cars & Trucks

1 Answer

What powers the injectors on a 92 chevy caprice


They are powered from the ignition switch (12volts). There is a fuse for them. When you turn the car on one wire at the injectors should have 12 volts. The other wire goes to the ECM and the ECM is what grounds the injectors to open and let fuel threw. This can be checked with a noid light or a volt meter.

Oct 02, 2011 | 1992 Chevrolet Caprice

1 Answer

1999 GMC Jimmy 4.3 gets P0303 (#3 misfire) Changed plugs, cap, rotor, wires. Did not help. Read GM tech bulletin and replaced fuel injection system from SCPI to MFI. Did not work. Checked #3 plug again...


Yes . You need an ohm/ volt meter. First check the injector, at the leads of the injector you should have 11 to 15 ohms. At the injector plug with the ignition on you should have 12 volts at one of the wires. To check for fire at the plug put the meter leads on the plug leads and crank the engine. the voltage should spike. My guess is that you have a bad wire on the #3 injector. All the injectors will have 12 volts with key on. The ECM grounds the injectors according to where the crank/cam sensor is. On your vehicle it fires 2 cylinders at a time. This is why I say you have a bad /broken wire. At the #3 injector plug you can also check for ground to the ECM. Instead of putting both leads to the plug you have to first find the ECM wire, then put the meter leads to that wire and ground on the battery. Again it should spike in ohms

Sep 05, 2011 | 1999 GMC Jimmy

1 Answer

My 99' chevy 1500 pickup truck headlights just


Could be a bad ground oh headlights or power not getting to the bulb hot side.
If you have a volt meter you can measure the voltage there on the headlamp.
First measure the hot side...if 12 volts there then measure the bulb ground side. If 12 v is there then the ground connection is bad.

Hope this helps you

Jun 29, 2011 | 1999 Chevrolet K1500

1 Answer

How toreplace fuel injector chevy astro 1999


Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. Relieve the fuel system pressure. Refer to the fuel system relief procedure in this section.
  3. Remove engine cover.
  4. Disconnect negative battery cable.
  5. Remove upper manifold assembly.
  6. Disconnect fuel meter body electrical connection and the fuel feed and return hoses from the engine fuel pipes.
  7. Remove poppet nozzle out of the casting socket by squeezing the nozzle locking tabs together.
  8. Remove fuel meter body by releasing the locktabs.
    NOTE Each injector is calibrated. When replacing the fuel injectors, be sure to replace it with the correct injector.
  9. Remove lower hold-down plate and nuts.
  10. While pulling the poppet nozzle tube downward, push with a small prytool down between the injector terminals and remove the injectors.

    0996b43f8022cb96.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Exploded view of the fuel meter assembly, including the injectors

To install:
  1. Lubricate the new injector O-ring seats with engine oil.
  2. Install o-rings on the injector.
  3. Install fuel injector into the fuel meter body injector socket.
  4. Install lower hold-down plate and nuts. Torque the nuts to 27 inch lbs. (3 Nm).
  5. Install fuel meter body assembly into the intake manifold. Torque the fuel meter bracket retainer bolts to 88 inch. lbs. (10 Nm).
    CAUTION To reduce the risk of fire or injury ensure that the poppet nozzles are properly seated and locked in their casting sockets.
  6. Install fuel meter body into the bracket and lock all the tabs in place.
  7. Install poppet nozzles into the casting sockets.
  8. Engage electrical connections.
  9. Install new o-ring seals on the fuel return and feed hoses.
  10. Connect fuel feed and return hoses and tighten the fuel pipe nuts to 22 ft. lbs. (30 Nm).
  11. Connect negative battery cable.
  12. Turn the ignition ON for 2 seconds and then turn it OFF for 10 seconds. Again turn the ignition ON and check for leaks.
  13. Install the engine cover.

Jan 20, 2010 | 1999 Chevrolet Astro

3 Answers

1986 problem with no fire


Did you grease the back of the ignition module? if not do so.

Jul 02, 2009 | 1986 Chevrolet Chevy

2 Answers

Bought a used truck seller stated the fuel injectors are out.


The injectors in the 4.3 V6 vortec are the in the intake manifold, the only way to check is to have the truck scanned at Auto Zone or any auto shop that can scan for you. Most garage only charge $10.00 to $20.00 to hook up the scanner since they want you buisness and know most larger Auto Parst store scan for free.
Good luck and hope this helps.

May 28, 2009 | 1997 Chevrolet K1500

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