Question about 2004 Chevrolet Cavalier

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Engine head has been rebuilt

Cranks but no start, injector has pulse but spark no spark

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  • Chevrolet Master
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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: My 2005 chevy classic 4 cyl won't kick over (hard

Is there any theft codes? A theft code will kill the injector pulse.
Other than that it would be a wiring issue or the pcm has given up

Posted on Oct 21, 2009

Testimonial: "Thank you, I will give this info to the Tech."

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SOURCE: cranks no spark has injector pulse 1994 4.3 v-8

The ignition module is probably bad replace it.

Posted on Nov 06, 2009

alicantecoli
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SOURCE: i have a 327 small block i have spark and fuel but dont start

the coil will get hot with running ,timing must be out put cam back as it should be ,it will not run any better with the cam advanced ,this is tech talk by part time weekend mechanics that know sweet all nothing .reset the timing to static for number one TDC ,firing order 153624 ,the only way a cam will give more rpm is if its designed to with a different cam lobe configuration not just moving it ,This will also cause the engine to use more petrol because it has no power at the low RPM range .These boy racer mags think they know it all with their cog boxes and harry moss add on goodies ,and fancy paint jobs .If you want a faster car get a ferrari or a jaguar XK ,and ignore these so called experts who are all talk to baffle people like you ,if they think they know it all just ask this question ?? is this engine adiabitic or isothermal ,if they cannot or will not answer this question then just call them a sunday mechanic .

Posted on Mar 17, 2010

  • 367 Answers

SOURCE: I put a 97 engine

There are several thongs that could cause this. Have you checked the ignition module? The wore harnesses or ecu could be different. A number of sensors on the new engine could be bad or incorrect.

Posted on Mar 06, 2011

  • 6 Answers

SOURCE: 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

Posted on Jun 29, 2012

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1 Answer

No spark no injector pulse


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

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https://www.youtube.com/watch?v=EBABtCi_YQ4
Jun 3, 2014 - Uploaded by ScannerDanner
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

Engine turns over but my Saab 900i s won't start, and fuel not getting into engine, but, I have nearly half a tank, can the crank sensor stop the injectors from sending fuel into engine?


Yes, it will. The crank sensor sends pulses to the vehicle computer, which uses them to synchronize the firing of the injectors with the rotation of the engine. If there is no input from the crank sensor, there will be no injector pulse and no spark pulse.

Aug 10, 2015 | 1997 Saab 900

1 Answer

Jaguar xj sport 3.2 no spark or injector pulse


If ECU has crank signal and engine turns over, ECU should give injectors a pulse and trigger the ignition. If not ECU might be bad. You should check power and grounds going to ECU. There are usually multiple power and grounds going into ECU

Jan 06, 2014 | Cars & Trucks

1 Answer

Still need an answer to why my 98 explorer wont start ,started just fine 3 minutes prior spins but no start get spark compression fuel but no start if i wait a day or two it almost starts but dies qi


Check if the injectors are pulsing when cranking the engine over. Listen for the tick, or feel for the pulse with your fingertips, or buy a cheap "noid light"-an injector circuit tester- one that fits your injector harness connectors-plug it into an injector connector and crank the car. If circuit is working the noid light will be flashing.
Some anti-theft systems immobilize the injector circuit when they are activated. So you have spark, compression, and fuel to the engine, check the injector circuit.

Dec 01, 2012 | Cars & Trucks

1 Answer

Why does the fuel injector receive no pulse for 1998 ford explorer 4.0 motor


The 6 cyclinder motor has 6 fuel injectors. If your not getting pulse Electrical grond to an injector wire theirs a likly chance your not getting it at another. If your getting no pulse at all the engine won't run. Does the check engine light on with the engine running? What meadod did you determine that it had no pulse? Remove one injector wire one at a time with the engine running? If it's not running at all then the no pulse can be a common system part like the crank senser. Does the engine get spark? Most of the time pulse and spark are hand in hand so if the crank senser were bad it's not going to have s[ark either.

Dec 02, 2010 | 1998 Ford Explorer

1 Answer

Test: car won't start


does it crank but not start or does it just click like dead battery or starter if it cranks check for spark and fuel pull spark plug wire and insert a screw driver and hold it close to an engine ground and have someone try to crank the engine is there a strong spark and use what is called a noid light it plugs into the plug for the injectors to see if the injectors are pulsing it should blink when you try too too start the engine if you have pulse and spark check for fuel pressure there should be a service port on the fuel rail that looks like a valve stem for a tire sort of youll need a fuel pressure tester if you had no spark or pulse at tthe injectors its most likely either the cam sensor crank sensor or the computor(pcm) if only no spark change the coil if that doesnt work you might need an ignition module but that requires more testing I cant explain here see a technician if no fuel pressure remove fuel filter drain and attemp to blow air through it if you cant its clogged replace and try vehicle if no start still feul pump is bad replace pump .

hope this helped

Jun 18, 2010 | 2001 Volkswagen Jetta TDI

1 Answer

Crank but no start,no spark, has no pulse to


check crank sensor rear of engine.

Dec 23, 2009 | 1990 Volvo 740

1 Answer

2001 jeep Grand Cherokee fuel injectors


check the injectors on that bank for pulses.. a regular 12v text light will do it should flash when cranking... its very possible that the crank sensor or camshaft sensor on the replacement engine is bad and giving you all the problems you have now.. are you using the original injectors? if you have injector pulses then check the coil for pulses the same way.. btw make sure you have 12v to them even before cranking engine could be a bad asd relay..wet plugs on one bank would also indicate a possible leaking injector and basicly draing the fuel starving the oposite bank for fuel.. to verify that the rail must be lifted by removing all 4 bolts make sure the clips hold the injectors firmly and turn the key to run but dont crank it then look for fuel leakin from bottom of injector(s) any drips is a bad injector..

Jan 28, 2009 | 2001 Jeep Grand Cherokee

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