Electronic carb. The ignition module on the air cleaner is the most likely culprit. You can try cleaning the carb with spray, but the spark advance is controlled by the lean burn module on the air cleaner. It most likely is not working. Also check the O2 sensor for replacement. A lot of owners replace the lean burn system with a standard electric ignition conversion and bypas the the lean burn system.
The ign control module is in the air cleaner and is calle the "lean burn system". Your unit is 20 years old and probably needs replacement if you car is running poorly. Do some research on the lean burn system and you will find that it was an over complicated electronic ignition. Mopar has a electric ignition replacemen kit to bypass the LBS. This is an option to replacing the lean burn computer available at NAPA for about $135.00. The replacement is easy fix (about 4 screws and 2 plugs) and will fix your ignition problems, but if you plan on driving the car for a length of time get the conversion kit ($200.00).
Replace the ignition with a MOPAR electronic ignition kit #p3690426. You will never deal with lean burn again. It costs about $200 and bypasses the LBS. ANSWER I'm not sure what the question is. Do you need to identify whether you have the single or dual coil pick-ups? You will have 2 sets of wires coming from under the distributor if you have a dual; and one set if you have single.
A vacuum leak can cause a lean burn.
Lean burn refers to operating a gas turbine with excess air to optimize fuel efficiency and reduce emissions, while rich burn involves adding more fuel to the combustion process to increase power output. Lean burn technology is typically used for low emissions and increased efficiency, while rich burn is used for higher power output and faster response times.
A lean burn system is a fuel burning system that uses an excess of air in an internal combustion engine. They provide a high air to fuel ratio and are used in some vehicles.
Timing issue - either cam or ignition.
Running too lean
At a dealer.
Taking a guess, Your 1988 5th Ave has a 318ci motor with Lean-Burn Engine control. Chrysler put the control module in the rectangle box attached to the side of the air cleaner. All of the engine control module is inside that box to include the transistorized ignition system. Your distributor will have two pickup coils in it and not have a vacumn advance located on the side of it which will be another way of telling if you have the Lean-Burn system.
If your car is running poorly it is more likely the "lean burn system" located in the air cleaner. This is an over done electric ignition that after 20 years is probably shot. NAPA sells the replacement module for $135.00. A MOPAR electric ignition conversion kit #P3690426 is about $200.00 and will fix your problem for good. Don't go into the carb until you try the ignition. I did and it was the ignition system which I replaced and it runs great with the kit.
Chrysler used 2 models of carbs in 1986 on the Slant 6 depending on whether the vehicle came stock with the "lean burn" system or not. Short answer, lean burn models used a Holley 6145 carb, non lean burn used the Holley 1945. An internet search armed with this information should lead you to a posted diagram of your model.