Pclancy
Active Member
I have had nothing but problems with my ignition system and carb. No doubt due to some problems that came with the car, mistakes made by my mechanics and/or bad parts that we have put in. Or some evil combination.
About 6 months ago, we removed the lean burn. Everything worked well for a couple of months, but then the ignition began cutting off at random times. We diagnosed that as a faulty orange box (ICM). Put in a ICM made by standard and that stopped producing spark after a couple of weeks. Completely. Now we have put in a chrome ICM made by Mopar. That problem seems to be solved, and the spark is strong. Starting is either instantaneous (just after shutting down) or after just a bit of cranking when cold. I can live with it. The choke works well.
But the engine runs a bit rough at idle, especially when warm. Barely noticeable, but it is there sometimes (and sometimes not when the engine is cold). Feels like a very tiny rumble/misfire. And the engine stumbles and bogs just a little bit when you accelerate very gently from idle or a stopped position (on the flat). Or when you go up a hill, very slowly, from a stop. As you speed up past 10-20 MPH or so, the engine smoothes out and runs perfectly. At highway speeds, she runs like a champ. Smooth.
To fix this, we have rebuilt the TQ (original) carb. Twice. We have replaced the spark plugs. We have installed a new ICM. We have checked and adjusted the distributor. We have readjusted the choke and the vacuum advance. All wires and connections have been checked. Everything has been gone over twice. I'm sure I am missing some stuff.
You guys know by now that I am not a mechanic. But I choose my mechanics carefully, and the guy I have is good. But he seems to be stumped. And like all of us, he isn't perfect. The latest theory was that we replace the spark plug wires.
Any ideas? Thanks as usual!
Peter
About 6 months ago, we removed the lean burn. Everything worked well for a couple of months, but then the ignition began cutting off at random times. We diagnosed that as a faulty orange box (ICM). Put in a ICM made by standard and that stopped producing spark after a couple of weeks. Completely. Now we have put in a chrome ICM made by Mopar. That problem seems to be solved, and the spark is strong. Starting is either instantaneous (just after shutting down) or after just a bit of cranking when cold. I can live with it. The choke works well.
But the engine runs a bit rough at idle, especially when warm. Barely noticeable, but it is there sometimes (and sometimes not when the engine is cold). Feels like a very tiny rumble/misfire. And the engine stumbles and bogs just a little bit when you accelerate very gently from idle or a stopped position (on the flat). Or when you go up a hill, very slowly, from a stop. As you speed up past 10-20 MPH or so, the engine smoothes out and runs perfectly. At highway speeds, she runs like a champ. Smooth.
To fix this, we have rebuilt the TQ (original) carb. Twice. We have replaced the spark plugs. We have installed a new ICM. We have checked and adjusted the distributor. We have readjusted the choke and the vacuum advance. All wires and connections have been checked. Everything has been gone over twice. I'm sure I am missing some stuff.
You guys know by now that I am not a mechanic. But I choose my mechanics carefully, and the guy I have is good. But he seems to be stumped. And like all of us, he isn't perfect. The latest theory was that we replace the spark plug wires.
Any ideas? Thanks as usual!
Peter