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I do not get pulse to my injectors - 1991 Honda Civic

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Need a little more info like do you have spark do you have fuel to the injectors did u check to see if timing belt is broke?

Posted on Jul 28, 2008

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My injectors arent pulsing on my 1989 k1500 suburban. I have 12 volt power to the injectors and have replaced the module in the distributior. Any one have an anwser for me


The injector ground circuit must not be working. What causes the pulse is when the computer internally grounds the injector circuit, power is passed across the injector solenoid terminals. All the injector grounds are spliced together on each bank of engine, and run into the computer. So, injector power, but no pulsing would seem a computer malfunction as long as the ground wires are good. Did you check all the injectors for pulse with the noid light, or at least both sides of engine?

Jan 23, 2013 | 1989 Chevrolet K1500

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2000 Dodge Grand Caravan only have two injectors pulsing?


I would check the wiring harness for the injectors

Should have 12 volts with key on-- to all injectors,same
as the ignition coils

Ignition or Injectors are turned on by PCM Drivers

Do not put any voltage to injectors they are pulsed

Dec 20, 2012 | Cars & Trucks

1 Answer

No injector pulse


what vehicle? injector pulse controlled by computer. the computer recieves a pulse from crank angle sensor, or distributor pick up, etc.
then controls injector pulse. Mass air flow on some vehicles determines spray pattern

Jun 29, 2012 | 1991 Chevrolet Cavalier

1 Answer

No injector pulse


1991 this make you OBD1 . You can access a code by jumping 2 terminals together.The injector pulse is from the PCM . If you have no pulse you need to troubleshoot for spark first . If you dont have spark do spark first then injector pulse comes on. If no injector pulse check fuse in engine junction box.Use a volt meter check grounds at PCM. If all else checks out good replace PCM. You may also want to check the TPS. If this sensor short out in the WOT position you also wont get injector pulse.SO disconnect the TPS. and recheck for injector pulse

Feb 23, 2012 | 1991 Chevrolet Caprice

2 Answers

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.

Apr 08, 2011 | 1998 Ford F150 Regular Cab

1 Answer

My 01 sable starts and dies and thats all it does due 2 injector pulse gets weak but if i unplug all of them it has good pulse but if i even plug any one of them it looses pulse after a few seconds


Check all injectors with a needle stethoscope. Unplug electrical connector of bad injectors, and check the signal with (injector check light). The light must pulse. If not might be a bad computer. If yes replace bad injectors with new one. Hope will help.
This is a free advice. Do not rate me.

Sep 08, 2010 | 2001 Mercury Sable

1 Answer

No gas coming out the injector and there is gas pressure to the injector?


Is there an injector pulse going to the injector?(an electrical pulse to fire the injector).
Is there spark at the plugs?
If the pickup in the dist is faulty you won't have either one.
If your vehicle uses a crank pickup with or instead of dist pick up....if it is defective ....no pulse.
The above is 90% cause of no pulse....other is computer problem 10%.
If you do have a injector pulse and no spray.....and have fuel pressure....change the injector.
A quick check for spark is spray a little starting fluid in it.....if it starts on the fluid....spark is present.

Nov 03, 2009 | 1997 Chevrolet Blazer

2 Answers

2002 nissan sentra it wont start i got fire on the spark plugs bu


Injector pulse comes from Cam sensor, If you have a BAd CAMSHAFT sensor you will not get injector pulse, replace sensor and that should solve your problem. Good Luck and thanks for using FIX YA

Jan 20, 2009 | 2002 Nissan Sentra

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