02 cougar v6 surges rapidly when cold,runs fine when warm,check engine light is on tech could find no codes set

SOURCE: code 1443 Mercury Cougar XR-7 4.6 Ltr engine (Check Engine Light is on)

it depends on which letter is in front of the code
B1443 is door handle switch circuit open
C1443 steering phase Acircui short to ground
P1443 evaporative emission system control valve ( low / no flow )
hope this is what you ar looking for

SOURCE: 99 mercury cougar wont idol until car is warm p0420 codes came up

Hello, here is a thread I found on this site with from what it looks like, the same problem(with an added solution) that you have. http://www.fixya.com/cars/t1576683-1999_cougar_diagnostic_code_p0430_p0420

SOURCE: High engine idle 94 Mercury Cougar

replace throttle body gasket. first check to see if carbon has built up around the throttle valves in throttle body if so remove and clean it with throttle body cleaner.and a old tooth brush. besure to remove all electrical components or any thing that plastic or rubber the cleaner will destroy it.

SOURCE: battery light stays on

Your alternator isn't putting 14 volts out to the battery. Check the stator wire on the alternator and the 3 wire plug make sure there is no gap on any of the alternator connectors and they are on VERY firm!

Hook up a multimeter inside your car and watch the battery voltage! if under 14volt you got an alternator problem!

SOURCE: 2000 Mercury Sable with a

cold start injector not functioning... check the supply to the injector.