I recently acquired a 91 ford mustang gt, and i have trouble starting the car after a 20+ min ride. It cranks for about ten seconds until the engine finally turns over. And when it does, it idles kind of funny, but it still drives. I've been browsing the internet and i found out that it might be my ect sensor. I've checked my car dozens of times but i can't locate the ect sensor or the connector plug. The car has no heater tube, the thermostat housing doesn't have a threaded port to connect the ect sensor to, and i've also checked the intake manifold but no luck. Please help! I recently ran codes today and these are the codes that I got: 51, 22, 63, 54, 31, 85, and 87. Thanks in advance.