Chrysler Repair: 1989 Chrysler Convertible 2.0 Carboration, chrysler labaron, fuel injection problems


Question
Thank you Roland for the info.  It is not turbo charged.  Unfortunatly it is in the shop again with the same problem, and will run only a few minutes befor it floods out. I will check by there tomorrow and run your test. The history of this car the last few years is that it has had muliple electrical problems and they had to replace some of the wiring harness. I am beginning to believe that I may have to replace most of the wiring before this is over. The engine is sound and we have serviced it faithfully over the years. It is in great condition this is the only problem at this time.

Is there a wiring diagram that I can purchase? I have electrical wiring experience troubleshooting Helecopter wiring in the Army. If the shop can't fix it I may try to replace all the wiring myself.
Thank You again   Joseph-------------------------
Followup To
Question -
My 1989 Chrysler Labaron Convertable has fuel injection problems. It will dump a large amount of fuel in the carb until it stalls out. We have had it in the shop twice and each time they replaced a sensor unit that they say controls that function. It will work great for about a month until the symptom returns. Could this be in the computer or some other area?
Answer -
Hi Joseph,
I need to clarify some of the history. I believe this is a 2.5L engine that is not turbocharged, correct? And just to clarify terminolgy there is no carburetor on a fuel injected engine, rather there is one or more fuel injectors. Would you be able to tell me what sensor(s) they replaced by looking at the work receipts that were written for those two services? I have one idea of what might be wrong but I need to know the answers to these questions.
Also, if you will try one diagnostic test it would be helpful: turn the ignition switch "on-off-on-off-on and leave on" within an elapsed time of 5 seconds. Then look at the check engine light which will remain on to begin to flash, pause, flash, pause, etc.  Count the number of flashes before each pause and tell me what the number counts are in the order that they occured. Those are the basis for self-diagnostic fault codes that will tell us if the engine controller has detected any problems. Repeat the process just to make sure you got an accurate count.
Roland


Answer
Hi Joseph,
I have the same year and engine in a LeBaron coupe. I suspect that what you are having a problem with is the fuel injector proper. These do wear out and usually the symptom is an inability to control the fuel flow so you simply remove the lid on the air cleaner box, look at the throttle plate located directly below the injector and have a helper crank the engine. The spray should be very fine, almost invisible and symmetrical. There should be no large drops and the spray should stop instantly when the helper stops cranking, with no afterdrip. So if you did that at the shop you could either rule that out or in as the explanation of the problem. If so it has nothing to do with the wiring of the car. A new injector from a Chrysler dealer is about $150 plus labor. You can do it yourself and I have the shop manual that shows how. I also have the wiring diagrams for the car, and I can xerox and postal mail them to you, but I wouldn't do any wiring or re-wiring until there is evidence that it is damaged. I agree with you about wanting to keep the car running.
Roland