Stalling and hesitating when cold
We have a 1994 Tempo, four cylinder, multi-port fuel injection, a standard transmission, and 201,000 miles. We have had it since new and have taken care of it. It has always started and ran well. Lately it takes quite a bit of cranking to start when cold, and will stall and hesitate when you give it the gas until it warms up. If it were carburated, I would say the choke wasn't coming on. Any ideas as to cause? The AutoZone counter man suggested the "cold-start injector," but I have a repair manual and it doesn't mention such a fifth injector. Is there something that is supposed to restrict airflow or add extra gas when cold? I have recently changed plugs, wires, distributor cap, fuel filter, and PCV valve. It runs better now, but the cold running condition hasn't improved.