SPONSORED LINKS

P300 code

Tiny
CROONEY
  • MEMBER
  • 2003 DODGE CARAVAN
  • 103,000 MILES
Replaced plugs, coil, wires for plugs also reported P0172, cyclinders 2, 4, 5 misfire reported.
Sunday, October 9th, 2011 AT 9:41 PM

9 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Are there any driveability issues?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, October 9th, 2011 AT 9:47 PM
Tiny
CROONEY
  • MEMBER
  • 5 POSTS
No, the enine will start and it will drive, but seems a little lumpy when taking off or reversing, pulled new plugs out and found 2, 4, 5 a little sooty, black like not burning fuel.
Was this
answer
helpful?
Yes
No
Sunday, October 9th, 2011 AT 10:13 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If those cylinders were dead, you would know it. Did you look at the other plugs, how do they look? You also had codes p0302, 304, 305?

It's possible your system maybe running a little rich?
Was this
answer
helpful?
Yes
No
+1
Monday, October 10th, 2011 AT 2:35 PM
Tiny
CROONEY
  • MEMBER
  • 5 POSTS
The other plugs look normal, not sooted.
Was this
answer
helpful?
Yes
No
+1
Monday, October 10th, 2011 AT 4:36 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
As far as the system running rich, several things that can cause that. Use a gage and check fuel pressure. See if pressure will hold, with everything off.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, October 10th, 2011 AT 5:02 PM
Tiny
CROONEY
  • MEMBER
  • 5 POSTS
Does the preesure not hold true for all injectors & lines or is the banks different, pressure should be approx 55psi - 60psi correct. Reason bing 2 74 are in trh front and 5 is in the back?
Was this
answer
helpful?
Yes
No
Monday, October 10th, 2011 AT 5:07 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Maybe an injector/s leak? Can you erase codes and see what comes back?
Was this
answer
helpful?
Yes
No
Monday, October 10th, 2011 AT 6:14 PM
Tiny
CROONEY
  • MEMBER
  • 5 POSTS
I disconnected battery neg terminal yesterday and engine light is gone now, driving this morning and light has not returned yet, I will look at codes again or see if tester still reads misfire cyclinders 2, 4 5. Although orignally it also gave a P0171 code which is MAP sensor or Or sensor? Is there 2 o2sensors on the exhust output? Is it possible either could be bad.
Was this
answer
helpful?
Yes
No
Monday, October 10th, 2011 AT 6:21 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
My info shows 171 is a lean code.
172 is a rich code. At the moment, if no check engine lite and no driveability issues, I wouldn't go hunting trouble. Intermittent issues can be a pain to track down.

Yes, the 02 sensor could be an issue, but, without testing, we're just throwing parts at it.
Was this
answer
helpful?
Yes
No
Monday, October 10th, 2011 AT 6:46 PM

Please login or register to post a reply.

Related Ignition Coil Replace/Remove Content

Ignition Coil Replacement
VIDEO
Ignition Coil Replacement
Instructional repair video
VIEW MORE

Sponsored links