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2002 chryler t&c 3.8 injector on only three
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eandrauto
Novice
Jul 17, 2012, 2:43 PM
Post #1 of 14
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2002 chryler t&c 3.8 injector on only three
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i have a 02 chrysler t&c with a 3.8. wanted to see if any one ran into this problem before.
it has injector pulse on only three cyl. and spark on only three. nothing out of the pcm on the other three.
tried a good known pcm but still the same problem, not sure if it has to get reprogramed. to wipe out the problem.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 17, 2012, 4:25 PM
Post #2 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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Which 3 cylinders?
Do you have power supply to those injectors?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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eandrauto
Novice
Jul 17, 2012, 5:38 PM
Post #3 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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CYLINDERS 2, 3, 4 . POWER IS THERE, NOT GROUNDING OUT FROM PCM. IM PRETTY SURE ITS THE PCM CAUSE IF IT WAS CAM OR CRANK IT WOULD BE ALL INJECTORS. THE SUB HARNESS IS GOOD. JUST NOTHING OUT OF THE PCM. BUT DID TRY A GOOD USED ONE AND SAME PROBLEM THATS WHATS GETTING ME. WASNT SURE IF IT HAD TO BE REPROGRAMED
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Hammer Time
Ultimate Carjunky
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Jul 17, 2012, 5:44 PM
Post #4 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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That's really odd because there is nothing in common to those 3 cylinder beside the connector to the PCM or the PCM itself. I seriously doubt it is a programming issue. It could be burned out quad drivers in the PCM but I would more suspect and issue with the wiring harness.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Jul 17, 2012, 5:48 PM
Post #5 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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PCM setting any trouble codes?
I'd would be curious to see what the cam and crank sensor waveforms look like.
I don't understand how you can have spark out of 1,5,6 and not 2,3,4. Its a waste spark system, so you should be seeing spark on 2,3,4 during exhaust stroke when the PCM fires the coils for 1,5,6 for their compression stroke. That right there tells you the coil drivers are good and the PCM is capable of controlling them. Has to be an PCM input problem.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 17, 2012, 6:08 PM)
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eandrauto
Novice
Jul 17, 2012, 6:19 PM
Post #6 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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NO TROUBLE CODES AT ALL. BUT WHEN COMMANDING THEM ON WITH THE SCANNER IT SENDS THE SIGNAL. DONT HAVE MY HANDS ON A LAB SCOPE RITE NOW BUT CRANK AND CAM SENSORS WERE REPLACED BY ANOTHER SHOP THEY GAVE UP ON IT.
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Discretesignals
Ultimate Carjunky
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Jul 17, 2012, 6:25 PM
Post #7 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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Does the ATM test also fire those injectors?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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eandrauto
Novice
Jul 17, 2012, 6:28 PM
Post #8 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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YES JUST NOT WHEN CRANKING OVER WITH THE KEY. AT THE FIRST CRANK THE NOID LIGHT COMES ON ONCE, THEN IT WONT COME BACK UNTIL YOU TURN SWITCH OFF THEN CRANK OVER AGAIN.
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Discretesignals
Ultimate Carjunky
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Jul 17, 2012, 6:31 PM
Post #9 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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I'd really be checking the cam and crank sensor waveforms next. You have control with your scan tool on the injectors and coils. It has to be some weird input problem.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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eandrauto
Novice
Jul 17, 2012, 6:37 PM
Post #10 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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I'LL GET MY HANDS ON A SCOPE TOMMOROW AND CHECK THE WAVESFORMS. JUST SEARCHING TO SEE IF ANY ONE RAN INTO THIS PROBLEM BEFORE BECAUSE I NEVER HAD. THANKS FOR EVERYONES INPUT ILL CHECK THE WAVES AND REPLY. THANKS AGAIN
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Discretesignals
Ultimate Carjunky
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Jul 17, 2012, 6:51 PM
Post #11 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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Just curious, what is the repair history on this vehicle? Has the transmission or flex plate been off?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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nickwarner
Veteran
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Jul 17, 2012, 7:14 PM
Post #12 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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Before your next reply look at the left side of your keyboard and press the third button from the bottom once. You don't get help any faster when its all in caps lock and its actually very rude.
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eandrauto
Novice
Jul 26, 2012, 6:21 AM
Post #13 of 14
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Re: 2002 chryler t&c 3.8 injector on only three
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Finally got the ok from customer to rip off timing cover. someone replaced engine with an 06 3.8. and this is a 02. wrong timng gear. sending wrong signals. put new gears on all good now. thanks again for any advice. except the one about the caps lock. (no caps, happy now lol)
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