It almost sounds like the cruise is working backward. It's like it is pulling the throttle closed in attempts to hold cruising speed rather than pulling it open as it should. I'd concentrate on the linkage as you described. Are you SURE it is connected properly? Being connected as it was before means nothing as you had the issue before you swapped out the cruise unit. Check with a FSM or another car to see that things are connected as they should be. ----- Original Message ----- From: "Jay King" <j_king@xxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Monday, May 08, 2006 9:58 AM Subject: IML: 1973 Cruise Control Weirdness Hello, list, I've been working on getting my '73 LeBaron ready for the 300-mile trip to my daughter's college graduation this coming weekend, and I encountered a strange cruise control malfunction not covered in the FSM. First of all, the servo works--electrical, vacuum, everything. I was concerned that it might be marginal so I swapped it with a cruise control servo off a Fifth Avenue (slightly different housing, but identical mechanically) and got the exact same symptom. Swapping the actuator cable brought no joy either. Here's the symptom: accelerate the car to cruising speed, turn on the control, and press the button to engage. As with all Mopars of this vintage, the cruise control takes three or four seconds to take effect, at which point the engine speed should increase to the set level and the driver can rest his right foot and smile. Not on my car! The engine speed falls to idle and the accelerator pedal becomes brick-hard. Disengaging the cruise control by turning it off or tapping the brake lets the accelerator return to normal operation. So the cruise control works but it does not function, if that makes sense. When I take any car to a mechanic, I always describe the problem and any steps I have taken to solve it but refrain from diagnosing. That's his job, and it's possible I could give him information that would cause him to waste time because I'm not that much of a diagnostician. However, in this case, I'm sure the problem is in the throttle connection. The servo works as it should, the cable moves freely (I swapped a Fifth Avenue cable onto the LeBaron, just to be sure), and the control system (turn signal switch, brake interface) is doing what it's supposed to do, so I'm stumped. Any advice or suggestions would be appreciated. Thanks in advance! Jay King Meridian, Mississippi <a href=mailto:j_king@xxxxxxxxx>j_king@xxxxxxxxx</a> Honey Gold 1973 Imperial LeBaron 4DHT Sterling Silver 1981 Chrysler Imperial Coupe Charcoal Gray 1985 Chrysler Fifth Avenue Nightwatch Blue 1987 Chrysler Fifth Avenue ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm