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Rough Idle and Backfires

Tiny
CAPTAINJIM
  • MEMBER
  • 1986 DODGE ARIES
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 75,400 MILES
1986 dodge aries with rough idle, and back fires when pedal is applied going up a hill, computer code 12 which is memory standby power lost per the aries repair manual. Have replaced the distributor pickup, rotor, cap, coil, EGR valve, PCV valve and map sensor - also regapped the plugs and have checked the vaccum hoses for leaks and cracks. I have a new power unit (dodge speak, it is located on the fender next to the battery and may be called the ECU in other vehicles), but have not installed it since the box says to fix whatever is causing the problem first. It could be the power unit itself that is problem.

The car has 75,400 miles.

Any ideas?
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Saturday, July 30th, 2011 AT 3:57 PM

4 Replies

Tiny
AUSERNAME123456
  • MEMBER
  • 106 POSTS
I think its the spark plug wires need to be replaced. Then test drive it to see if this gets it fixed.
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Saturday, July 30th, 2011 AT 4:38 PM
Tiny
CAPTAINJIM
  • MEMBER
  • 3 POSTS
Unfortunately, that was done last year.
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Saturday, July 30th, 2011 AT 4:59 PM
Tiny
AUSERNAME123456
  • MEMBER
  • 106 POSTS
You have covered everything else. The only thing left is the power unit.
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Saturday, July 30th, 2011 AT 5:04 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Backfire sounds like lean or out of time. Did ya get it fixed yet?
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Sunday, October 16th, 2011 AT 5:59 PM

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