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How do you use a noid light?

Need a video of how to use a noid light. D light

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Posted on Feb 08, 2014

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I have a 2000 cavalier,fuel pump is working,filter is clean,relay is working,will only start with carb cleaner?any suggestions,tks


You need to pick up some noid lights to check injector pulse if light blinks that's good next check the fuel pressure it should be about 50 psi just est pressure if @ 30 psi car will not start. Fuel pump or regulator. Now if you can't get noid lights use a test light on wires to injector s key on hook end of test light to neg side of battery one wire should be hot now swap ends @ battery to pos side the wire that had no power test that wire have some one try to start car if light blinks it good . The noid lights gust make it easier .I will follow this post if you need help . Please rate my help

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I have a 89 rs camaro with the 5.0l can anybody offer suggestions on what the possible fuel system issues are with year and model? I've changed the fuel and air filters rebuilt tbi ran fuel system cl


check fuel pressure TBI injection fuel pressure should be 9 - 13 psi.make sure fuel pressure above 10 psi because throttle body need at least 10 psi. in order to work right.if all is good check see if PCM firing the fuel injectors.go to auto parts store buy noid light.to use noid light you have to disconnect fuel injector electrical connector then plug noid light into fuel injector connector.crank engine watch noid light should blink meaning PCM is firing fuel injectors if noid light steady not blinking PCM not working.if noid light dont light up you have open circuit in the fuel injectors wiring.if check engine light flashing have vechicle code scan.bad tps sensor will also cause problem you are having.

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Why would a cylender not fire if the plug has spark and all other cylenders are firing?


What test told you it is not firing?

You may have valve damage &
little compression

Jan 09, 2013 | Cars & Trucks

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P0 308


when the engine is cool spray carb cleaner around the intake manifold

Oct 10, 2012 | 2000 Ford F250 Super Duty Crew Cabs

1 Answer

I have a 88 mustang 2.3 and I having problems getting it to start. If i take a fuel line off and turn the key it dumps fuel so the pump is good and I hear the pump hum and then the relay click, as always,...


There are free loaner tools at Autozone and Advance for instance. A noid tester is what you want and this will plug into one of the injector wires. The noid will light up and it receives a pulse to make that injector open. You need to safely crank the engine and watch for the noid to light up.

If you are not getting a light on the noid, it means you are not getting the injectors to open. Then you need to find the cause. It's possible your inertia sensor has disconnected the fuel pump power and your injectors will still open but have no fuel. This has a push button reset. It will not generate a "check engine" light.

Many other causes for your problems should generate a "check engine" light. You can sort out potential problems by listing those which generate a "check engine" light and those that do not.

Since you are capable of going online, there are several Youtube and other videos which can show you where the inertia switch is and what to do.

Jul 20, 2017 | 1988 Ford Mustang

1 Answer

What causes injector not firing gas?


FUEL INJECTOR NOT FIRING COULD BE FAULTY FUEL INJECTOR.HOOK A NOID TEST LIGHT TO FUEL INJECTOR ELECTRICAL CONNECTOR. CRANK THE ENGINE WATCH THE NOID TEST LIGHT SHOULD BE BLINKING WHILE ENGINE TURN OVER.IF TEST NOID LIGHT STEADY PCM FAULTY NOT FIRING THE FUEL INJECTOR.IF FUEL INJECTOR DONT BLINK OR LIGHT UP.YOU HAVE OPEN WIRING CIRCUIT TO THE FUEL INJECTOR CONNECTOR.

May 13, 2011 | 1990 Geo Tracker

1 Answer

1992 saab 2.3 16 valve 9000 turbo starts and quits real fast please e-mail Dave


test the fuel injectors with a noid light type into you tube to watch a video on how to test fuel injectors with a noid light

Apr 04, 2011 | 1992 Saab 9000

1 Answer

My injector dont work and i need to know why


CHECK FUEL PUMP AND FUEL INJECTOR FUSE.IF FUSE IS GOOD.YOU NEED A NOID LIGHT TO CHECK TO SEE IF INJECTORS FIRING.YOU CAN BUY A NOID LIGHT AT ANY AUTO PARTS PLACES.WHAT YOU DO DISCONNECT FUEL INJECTOR CONNECTOR.HOOK NOID LIGHT TO CONNECTOR.CRANK ENGINE TO SEE IF NOID LIGHT BLINKS.IF YES INJECTORS FIRING.IF YOU GET STEADY LIGHT.PCM NOT WORKING NOT FIRING INJECTORS.IF YOU GET NO POWER OR LIGHT DONT WORK.YOU HAVE A WIRING PROBLEM.YOU NEED A HAYNES REPAIR MANUAL LOOK AT THE ELECTRICAL WIRE DIAGRAM.TO TRACE FAULTY WIRE.

Mar 21, 2010 | 1989 Chevrolet G10

1 Answer

Injectors won't oppen


check for spark at coil if you have spark check for injector pulse at injector with noid light..if noid light does not flash check for power at one side of injector connector ..if you have 12 volts at injector connector but no flashing of noid light replace ignition control module under distributor cap

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Testing injectors


need to get one that does or use gator clips and just run wiring but be very careful

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