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1998 Dodge Ram

Tiny
MGRAFFITO1
  • MEMBER
  • 1998 DODGE RAM
  • V8
  • 4WD
  • AUTOMATIC
  • 86,000 MILES
When accelerating, the engine has a lean pinging sound, then the "check engine" light comes on.
The computer scan says "MISFIRE CYLINDER EIGHT"
I did a compression test on that cylinder and it was fine. The plugs are new.
I have replaced the cat converter, plenum pan gasket, wires, cap, and rotor.

Can it be the PCM? I read that there is an older TSB regarding reprogramming the PCM for these symtoms.
Help!
I neglected to mention that I also pulled the injector and the screen was free from any debris.
Although, the schrader valve on the fuel rail blew out a foamy, bubbly fuel when I depressed the stem. Is this normal? Or is it part of my problem?
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Saturday, February 21st, 2009 AT 6:37 PM

3 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Check fuel injector
check injector pulse
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Saturday, February 21st, 2009 AT 6:56 PM
Tiny
MGRAFFITO1
  • MEMBER
  • 2 POSTS
I neglected to mention that I also pulled the injector and the screen was free from any debris.
Although, the schrader valve on the fuel rail blew out a foamy, bubbly fuel when I depressed the stem. Is this normal? Or is it part of my problem?
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Saturday, February 21st, 2009 AT 7:16 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Switch the injector with another
check if code move with the injector
check if you have a pulse on that injector
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Saturday, February 21st, 2009 AT 7:40 PM

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