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No spark in 2, 3, 5, 6

Tiny
DANNYBEUCK
  • MEMBER
  • DODGE INTREPID
I have a 99 dodge intrepid 140k miles on car 0 miles on motor.I just installed a 2002 rebuilt 2.7L engine. I cant seem to get spark I am geting spark out of no.2 and 3 but no others I have checked the crank and cam sensors and they seem fine I also checked the coil packes they are fine and have no shorts and good grounds.I also have power and ground to the pcm and no trouble codes are coming up what could this be?Bad PCM? Or do I need to have the car programed by the dealer? Any help would be great I am a auto body tech in need of a machanic
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Saturday, October 27th, 2007 AT 2:20 AM

7 Replies

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
IT is really strange that no codes are showing when it has to have misfires on some cylinders.

What led up to the engine replacement, anything that could have already had those symptoms or was it the typical oil sludge problem they had?
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Saturday, October 27th, 2007 AT 7:20 AM
Tiny
DANNYBEUCK
  • MEMBER
  • 5 POSTS
Yes, the car had a rod knock and threw it threw the block
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Saturday, October 27th, 2007 AT 10:26 AM
Tiny
DANNYBEUCK
  • MEMBER
  • 5 POSTS
Well after two GM techs come by and looked at my car they said it was the PCM so I bought one only to have the same problem! And less money someone please help!
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Friday, November 9th, 2007 AT 5:48 PM
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
IF you have anti-theft, the pcm needs to have it programed into it' This is out of mitchell. Do you still get spark on the same cyls or none of them now?
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Sunday, November 11th, 2007 AT 5:15 AM
Tiny
DANNYBEUCK
  • MEMBER
  • 5 POSTS
I still only have spark on the same cyls
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Sunday, November 25th, 2007 AT 8:05 PM
Tiny
DANNYBEUCK
  • MEMBER
  • 5 POSTS
I still only have spark on the same cyls[/quote:c600111fb1]
I also dont see a light that says theft on dash or alarm ect
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Sunday, November 25th, 2007 AT 8:07 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
I still only have spark on the same cyls[/quote:5c315a4cc6]
I also dont see a light that says theft on dash or alarm ect[/quote:5c315a4cc6]

hello

If I recall right the 2.7 have 6 coils on it
U has to pull wire of each one and check if you have power and when cranking u get pulse
With key on all should have battery power on one of the wires?
And the PCM will ground and pulse the other wire if that is happening the coils are bad if not happening
Trace the wiring and then if all ok and good u can say the PCM bad
Very uncommon but can happen
Check if u plugged the wrong wire in a wrong pluG
It’s not a cam or crank u have spark on 2 cylinders
WIRES....... COIL......... PCM

Good luck
Let me know
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Sunday, November 25th, 2007 AT 9:22 PM

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