Fix Caravan runs rough, Town & Country runs rough
If you have a Caravan runs rough or Town & Country runs rough, check out these possibilities. Chrysler products are know for their issues with
crankshaft position sensors and camshaft position sensors. Bad sensors can cause a no start or rough idle or stalling issue. If you’ve replaced those sensors or know they’re good, move on to the next step.
Caravan runs rough, Town & Country runs rough due to misfires
A rough engine can be caused by a vacuum leak that allows unmetered air into the engine, an ignition problem, or a fuel injector issue. One easy way to tell is to use a scan tool with live data. If you see a high oxygen sensor reading with a negative fuel trim, you know that you’ve got a misfire problem. If you’re confident that the spark plugs and wires are in good shape, examine the fuel injector wiring harness.
Chrysler fuel injector wiring harness is a known problem
Most car makers run power to the fuel injectors on a common wire. The PCM then provides the ground to each fuel injector on an individual wire as it fires each injector. Unfortunately, Chrysler injector wiring harnesses are a known failure item, especially where the harness routes near the exhaust crossover. The heat from the exhaust crossover can melt the insulation and cause short to ground or open circuits. Check the main and sub-harness under the intake plenum for harness damage. Install a new sub-harness or repair the melted harness to correct the problem.
Chrysler Fuel Injector wiring diagram
©, 2017 Rick MuscoplatPosted on by Rick Muscoplat