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Keeps pulsing when power is on

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No spark no injector pulse


No Start, No Spark, No Injector Pulse (faulty crank sensor ...

? 35:19
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No Start No Spark Case Study 1997 Lincoln Continental 4.6 How to test a VR type crank sensor. (VRS) This ...

NO START,NO INJECTOR PULSE Thanks Paul Danner ...




Nov 25, 2015 | Cars & Trucks

1 Answer

What causes o low injector pulse


Is that static pressure with key on, engine off? Or engine running pressure? Both should be near 60, usually key on, engine off pressure will be about 3 or 4 psi higher.
If it runs good after starting, the injector pulse must be good. No reason why starting and running pulse should be different. Only difference is when running, fuel pump power is kept on by the oil pressure switch, whereas in starting, the fuel pump relay keeps the pump on. Very unusual, let us know. Measure voltage at one of the injector's power wire with key on. It should be battery voltage or very close.

Aug 22, 2015 | Cars & Trucks

1 Answer

2001 Acura mdx abs light stays on. Code reads 04?


I think you pulled the code incorrectly, or are reading it wrong. To get code:
1. Jump pins 4 & 9 on OD2 connector.
2. Turn key 2 clicks.
3. ABS light should blink to give you code. (long blinks for first digit, short ones for second. Example: One long blink and three short blinks would be 13).
Honda ABS trouble codes list :
11= Right front wheel sensor (open/short to body ground/short to power)
12= Faulty right front wheel sensor pulse signal
13= Left front wheel sensor (open/short to body ground/short to power)
14= Faulty left front wheel sensor pulse signal
15= Right rear wheel sensor (open/short to body ground/short to power)
16= Faulty right rear wheel sensor pulse signal
17= Left rear wheel sensor (open/short to body ground/short to power)
18= Faulty left rear wheel sensor pulse signal
21= Continous Operation (chipped pulser)
31-38 are all the same: "solenoid"
51= Motor lock
52= Motor stuck off
53= Motor stuck on
54= Main realy stuck off
61= Ignition voltage
81= CPU (central processing unit)

Jul 03, 2013 | Cars & Trucks

1 Answer

I have 1993 suzuki sidekick head gasket was replaced then cant get it start has a week spark


If it isn't pulsing right, maybe it is staying on all that time -and spraying fuel like crazy into your cylinders! Come on, Joel, a weak spark and injectors not pulsing right? Get a different ecm and plug it in. Then you can learn the circuits on your old unit and fix it in your spare time.

Jan 15, 2013 | 1993 Suzuki Sidekick

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

2 Answers

Blazer would not start and after changing the fuel pump the engine starts but will not run.


Open your hood and look for a fitting on your fuel line that resembles a tire fill valve. Depress this with the ignition switch off, and if there is air in your line you will smell gas and hear a slight hiss. Now turn the key to the on position and listen for the fuel pump to hum with your door open. If you hear nothing, you have no power to the pump, or it has already pressured up and is still passing air through the injectors. Also you ,may try depressing the same valve with the key on and see if fuel flows out. Be careful to stand clear so you dont get sprayed.

Mar 07, 2010 | 2000 Chevrolet Blazer

2 Answers

No power to fuel pump no hum when key on and inj not pulsing


Fuel Pump Relay Circuit...
There is an Oil pressure switch in this circuit that disallows the relay to complete the power supply to the fuel pump. It is for safety purposes , it senses engine oil pressure upon cranking of the engine and then completes the ground circuit to close the relay sending voltage to the fuel pump at start up, and also functions as an engine kill if you loose oil pressure opening the ground circuit which in turn opens the contacts in the relay shutting off the power to the fuel pump.... Invest in a vehicle specific repair manual with wire diagrams... hope this helps..

Aug 16, 2009 | 1989 Chevrolet Suburban

1 Answer

Car won't start


Pull one of the plug wires and rest it where a chassis ground is near and then look for spark. If there is none, the coil or 'power pack' may be bad or the pulse pickup in the distributor has failed, If it is the former, you must have an ohmmeter at least and measure at the spark output lead or contact to any other contact you find and it should be between 7,000 and ~12,000 Ohms. On the primary side you need at least one contact and a case ground; this should measure close to nothing; that is, about the same as shorting the meter leads together.
Chekcing the pulse pickup is tougher since they can vary a bunch but shouldn't be less than ~ 1,000 Ohms and in no case infinite (off the highest scale).
Things not likely are sparkplugs and the sparkplug wires; eithr of these would only affect one or two cylinders, not all.
If you smell gasoline, try pushing the accelerator slowly to the floor and keep it there while you crank the engine.  Sometimes, the plugs get wet and will then not fire and allowing maximum air to enter the engine and not pumping the gas pedal, will dry them and allow the engine to start again.   

Sep 19, 2008 | 1992 Mitsubishi Diamante

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