P0172: Fuel Trim System Rich Bank 1 (Driver-Side)
P0301: Cylinder #1 Misfire (not necessarily an injector)
Definitely sounds like something is wrong with #1....i'd be checking compression and actual engine vacuum before replacing anything else. Compression, running compression, and vacuum will give you the direction to go.
- Bernd
-----Original Message-----
From: ttroidl@bluefrog.com [mailto:ttroidl@bluefrog.com]
Sent: Sunday, December 06, 2009 11:48 PM
To: dakota-truck@dakota-truck.net
Subject: DML: misfire/backfire 02 Dakota 3.9
Well, after replacing cap rotor, plugs, wires. it still pops thru the intake under load at low rpms, (sometimes) and for the 1st time the eng light came on!
Got po172
po301
misfire only cyl 1, new plug & changed out wire again still no go.
I did look down the TB for oil, pretty clean, very very little oil or anything.
I'm looking at injector next????
when it's popping in OD if I step on it hard it goes like a bat outta hell...
$72 for an injector, figured I'd post my findings befor I spend $$$ if it's not gonna help!
thanks much!
Tony.
This archive was generated by hypermail 2b29 : Fri Jan 01 2010 - 02:54:40 EST