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Chevrolet captiva ltz turbo diesel cranking but wont start problems related

How does injectors work

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Problems include
insufficient cranking speed
incorrect fuel pump pressure to the injectors---25,000 psi--
crank position sensor problem
glo-plugs inoperative
air in the fuel system
fuel tank not venting
ECM problems

run the fault codes to find the area of the failure

Posted on Dec 28, 2016

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Posted on Jan 02, 2017

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I have four fuel injectors and only 2 will spray fuel into motor. What could be the problem for the others not spraying?


Couple possibilities:
  1. the injectors are clogged
  2. The valves/pumps for the injectors are not working.
If it's (1) then you can try running a bottle of OTC fuel injector cleaner through. Mechanics will often have access to way more potent stuff in the case of a lot of bad deposits gunking them up.
If the other injectors are squirting just fine, it'll be odd to have the other two not working - they should have clogged/scaled up about the same. In that case, if could be the valve.actuators for the injectors. Location will depend on your vehicle. They will have input connections to the fuel management system that is triggering them many times per second. Check that the wiring connections are secure to them on both ends. If so, and if they'll reach, you can try swapping the leads with one of the functioning injectors and see if it works now. Swap it first by connecting the injector end of a working port to the non-functioning injector. If it works now, take the same lead and connect it to the base of the normal cable for that piston. If it works when wired from another cable source, and another cable, then you know the injector works. If the cable that normally goes to the injector, hooked to the source for a good injector works, then you know you have a good cable. If both of the above work, then run the known good cable to a known good injector, from the original source. If it doesn't work, then the source trigger unit for the injector is likely bad. That'd be a whole other discussion.

Generally, the injectors themselves are all the same, so you can go about the testing by just swapping a working injector with one of the 'not working' ones. That'll tell you pretty quick if it's an issue of no gas flow, or no control working, and go from there on cleaning out gas lines or replacing control parts.

Good Luck!

Nov 07, 2015 | Cars & Trucks

2 Answers

WHY ARE THE INJECTOR NOT WORKING 95 ASPIRE


The fuel injector circuit has to be operating for the injectors to work. Look for one hot wire to each injector with the key in ON. If there is no power to any injector, the injector fuse may have blown. Each injector has two wires to it- a power wire (hot in on or start) and a ground wire going to the engine computer. Check if there is power to the injectors.

Dec 31, 2014 | 1995 Ford Aspire

3 Answers

I have a 1999 vt commodore Eco tec engine anyway to fix injector 2 and 5 r not working can anyone help


Hi Chris, If the injectors are fitted to a gasolene direct or indirect injection engine try mixing injector cleaner with the fuel by pouring it into the tank. If the injectors are badly damaged they can be removed and maybe cleaned with special equipment. If we are talking about diesel distributer or in line pumps, the injectors can be serviced and repaired, however common rail injectors should be replaced as should injectors used for gasolene direct injection engines. Rgards John

Jun 07, 2014 | Cars & Trucks

1 Answer

I have replaced the fuel pump on my 1991 chevy cheyenne im getting fuel to the injectors but they aint working


Check the injector fuse. With key on, injectors should have constant power available to them on one wire. The other injector wire is ground wire. With constant power to injectors, all it takes to pulse the injectors is for the computer to ground the injector ground inside the computer for a split second, and pulse occurs, causing fuel to spray out the injectors.
So if injectors aren't working, either the injector drive circuit (the power to injectors) or the injector ground circuit is lost. You can buy a cheap "noid light" at any auto parts store, and check the injector circuit. Just plug the light into the injector connector and crank the engine over. If the light is blinking, circuit is good. If no light, the circuit has a problem, either on the drive side or the ground side.
Here's a way to check the ground circuit separately. Use a test light clipped to the Positive battery post. Probe the ground wire terminal of the injector connector while the engine is cranked over. The test light should be blinking-meaning the computer is grounding the circuit normally and would be causing the injectors to pulse, if power is available to them.

Aug 19, 2013 | Cars & Trucks

1 Answer

I have a 4 cylinder gsx eclipse but im getting a p0205 code which is a injector circuit malfunction in cylinder 5. why would i get this code?


CODE PO205 - IS INJECTOR 5. YOU NEED TO USE FUEL INJECTOR NOID TEST LIGHT OR A STETHOSCOPE TO CHECK ALL FUEL INJECTORS TO SEE OR HEAR WHAT FUEL INJECTOR NOT WORKING.USE TEST LIGHT IF BLINKS FUEL INJECTOR GETTING POWER.THE STETHOSCOPE USE IT LIKE A DOCTOR TO HEAR WHAT FUEL INJECTORS WORKING.YOU SHOULD HEAR CLICKING NOISE IF YOU HEAR NO INJECTOR NOISE AND IT IS GETTING POWER.THE FUEL INJECTOR IS FAULTY.

Nov 09, 2010 | 1995 Mitsubishi Eclipse

1 Answer

Engine stalls #6 cylinder not fueling. Replaced fuel injector, plugs and wires. Checked compression. All good. Removed injector rail and placed #4 injector plug on #6 and injector started fueling. ...


sounds to me that you need a computer since the injector gets its signal from the computer. You can get a noid light from auto parts store to test the wire attached to the injector. The light should flicker when cranking the car. No flicker chances are you need ecm.

Oct 07, 2010 | 1995 Buick LeSabre

1 Answer

1995 Buick LeSabre fuel injectors are not triggering. What is causing this?


Question:
Explain Triggering!

Fuel injectors do either one of three things:
1) Clogged - fail to pass gas through them when a voltage triggers them to fire/spay gas.
2) Electrical connection breaks inside the injector - 'throw it away and get a new one'
3) Signal being sent to the injector isn't being sent.
Swap a good known working injector with the suspected bad one. See if there is a change!
NOTE: Many times when the car is on and standing still idling, removing (a or 1) of the fuel Injector's electrical connection from it interrupts how smooth the engine idles.
If no idle interuption - injector isn't working at all
if a slight idle interuption - injector is working fine
if a major idle interuption - possilbe there are other injector's that aren't working either.
Blessings,
A/V Media Guy

Nov 21, 2009 | 1995 Buick LeSabre

1 Answer

Fuel injectors


There is a module to control the injector valve o and off. If it doesn't give a signal to turn on the injectors then injector is not working. The electrical connector from your injector is where the signal from the module going in.

Sep 10, 2009 | 2000 Oldsmobile Alero

3 Answers

Ford focus tdci wont start fuel gettin to injectors can u help 2005


Check the electric stop on the injector pump is working.

Aug 07, 2009 | 2005 Ford Focus

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