Last post on Oct 25, 2013 at 11:53 AM
You are in the Speed Shop Tuning and Modification
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Chrysler Le Baron, Engine
#8 of 11 Re: 1978 Chrysler LeBaron~ Stuck and I need help!!! [zaken1]
Sep 01, 2011 (2:01 pm)
Thank you SO much for all your info, its been a long road, but I think we're close to her becoming a daily driver. We aren't too concerned with aftermarket performancing-out this vehicle, she isn't even breaking 35 mph! (reguardless of how far you push the pedal). This is my first time asking for help this way, a cry out into the interworld, hoping to hear a cry back... Thank you!
#9 of 11 Re: 1978 Chrysler LeBaron~ Stuck and I need help!!! [lunaray42]
Sep 01, 2011 (2:23 pm)
Please replace the fuel filter; and see how much difference that makes. Also stand behind the exhaust pipe and have someone in the car step hard on the accelerator; while you feel the exhaust pressure coming out of the pipe. There should be a blast of exhaust pressure and increase in sound from the pipe when the accelerator is pressed. If there is little change in exhaust pressure or sound; the catalytic converter is clogged. If you ever want to go faster than 35mph, or not burn out the valves in the new motor; it will be necessary to remove or replace the converter. If there is a big change in exhaust sound and pressure; than the converter is OK, and you have other problems. Let me know, and we can go from there.
#10 of 11 Re: 1978 Chrysler LeBaron~ Stuck and I need help!!! [lunaray42]
Mar 31, 2013 (4:50 am)
We have to start with where the original design went wrong. Put in a points condenser ignition. These never fail and run poorly long before they fail. They are easy to adjust, just set dwell between 26 to 32 degrees depending on city vs highway driving. Get rid of the carb and buy a manifold adapter plate and out on either a holley 2300 ( 2 barrell) or 4150 ( 4 barrell ) carb with a manual choke. Plug the EGR valve. Plug the valve comming off the passenger side of the exhaust manifold. Put in a new power brake booster, it probably has a vacuum leak. Change the timing chain to a double roller chain and check for cam to crank true zero. Thus car should run like a top!
#11 of 11 Re: 1978 Chrysler LeBaron~ Stuck and I need help!!! [motordoctor]
Oct 25, 2013 (11:53 am)
First time blogging. first time to actually find information I need. I found a 77 Chry Lebaron that had 38000 miles, interior leather is perfect and exterior is perfect. Problem is there are a couple of extra vent holes in engine. The engine is the 318 2bbl with the lean burn carb system. As lunaray42 is describing the problems he is having I would like to avoid them. I would like to put the 4 bbl on but don't know what is needed. Right now I'm going for a used 318 engine then buy a new manifold and carb.
If anyone can help I'd be glad to give them use of my 45 years in the horse business!