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CHERY J1 LOST SPARK AND INJECTOR PULSE DOES IT NEED TO GO TO DEALER

I HAVE A CHERY J1 1.3L IT HAS LOST INJECTION PULSE AND IGNITION SPARK,I SUSPECT ITS TO DO WITH IMMOBILSER,MY KEY IS OK BATTERY IS GOOD ANY IDEAS OR SHOULD I JUST TOW IT TO DEALER

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1 Answer

I have fuel pressure but no injector pulse on my 1991 chevy s-10. im stuck , what should i do now?


Injector pulse is driven by the computer from the signal it receives from the ignition module. Check to see if there is spark because that could also be an indicator of a failed module or distributor component but having spark does not eliminate the module. It does eliminate the pole piece. If there is no spark and no injection pulse, you have to check for voltage to the B+ side of the coil. If it is there, remove and repair the distributor. If it is not there, you have to trace to see for a breakage, loose connection, bad ignition switch etc.

If is were a betting man, I'd say it's either the injector fuse or the ignition module.

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1 Answer

Lost inj. pulse need to know where the ecm gets crank position from. if from dist.how does it locate #1 1985 crovette


Lost injector pulse. First injector power is supplied by (IGN+) or fues block ,The injector are multi-potr not individual they are fired together,not individually, Now if you lost injection pulse youll need to inspect the Distributor,the pick up is highly suspectable to terminal corrosion, it corrodes easily,so be ready to replace the pick up with a module, (this is spark I know we are on Injector), Do you have spark, then leave this alone, Test injector pulse not at the injector because again its bank fire or group fired You ll need to test thes the connector harness connector,of the injectors.As long as there is spark you should have injector pulse from the injector sub harness connector make your way to the ECM , The ECM controls the energizing of the injector with a transitor or quad driver,they are synchronized to primary ignition . Here a solution if no spark correct for spark. Its either a Distributor pick up failure with ICM module.Do this only is you have no spark.If you have spark and no Injector ,replace ECM

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1 Answer

Why can't I get spart. Don't have injector pulse.


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You need to check all the timing signals, crank angle sensors, cam angle sensors etc and ensure that any security is disabled or turned off.
Check for spark, if you have spark but not injection pulses, then its a timing signal issue. If you dont have spark or injection pulses, also check the ECU (the cars computer) although I do not know of any issues with this make and model.

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1 Answer

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2 Answers

I checked my spark plugs and have a spark going to each plug. I changed the fuel pump thinking I didn't have enough fuel pressure. I sprayed some starter fluid in the intake and it started for about 5...


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1 Answer

My 1990 Chevy Celebrity wagon 3.1 multiport fuel injection is getting fuel to the rack at 45psi, but is not going through the injectors. Any idea the probable cause?


DO YOU HAVE 12 VOLTS ON INJECTOR WIRE ON ONE SIDE WITH KEY ON? IF SO ARE YOU GETTING SPARK? IF YOU HAVE NEITHER YOU MAY NEED A NEW CRANK SENSOR. VERY COMMON ON THIS ENGINE WHEN THERE IS A LOSS OF SPARK AND INJECTOR PULSE. INJECTOR PULSE(GROUND SIDE)IS CONTROLLED BY THE COMPUTER. IF YOU HAVE SPARK BUT NO INJECTOR PULSE AND 12 VOLTS ON INJECTOR FEED WIRE YOU MAY HAVE A FAUTY ECM(ENGINE COMPUTER)

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2 Answers

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1 Answer

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1 Answer

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I believe you are on the right track. E.C.U. or relay.

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1 Answer

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you need to start somewhere. get hold of a scanner and see if car has a crank signal. the crank signal supplies refrence for both base for ignition and injection pulse. if it has injector pulse and no spark, look at the ignition module/ coils but if has neither look at the crank sensor or harness to the module

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