Bad idle, barely runs, and backfires WTF???
Champion
Joined: Jan 2013
Posts: 4,737
Likes: 374
From: Northwest Louisiana
I have a 1990 Dodge Dakota 3.9L (late 1989 production) that also has idle control issues.It wants to stumble and die on decel and will not always idle without stumbling and stopping. I have replaced the fuel pump, fuel filter, repaired two vacuum lines, TPS, MAP sensor, EGR Valve, Plugs, Wires, Cap & Rotor, ECU (OEM refurbished). I have good fuel pressure (approx 14-15 psi), reasonable compression in each cylinder (within tolerance) and yet this continues to be an issue. Up until all this started the truck would run pretty good. This has NO cam sensor or crank sensor. 251K miles. Found and cleared a code 24 (TPS out of range) without any real change. Any other ideas?
For Lil'Maverick, who posted he had 14-15 PSI, it's a 1990, and thereby TBI.
Don't sweat - on Facebook, I HAVE posted a rather detailed troubleshoot on a Dakota ... in a MN12 Thunderbird forum.
Stuff runs together sometimes. And for some reason, my 1988 Dakota doesn't troubleshoot like my 1991 Cougar does with the 5.0HO ...RwP