1995 Mercury Sable starting and stalling problems.
My 95 Mercury Sable has a year old rebuilt engine in it and a 16 month old new transmission. Recently, the car started just stalling, dead off, unpredictably not only at a stop while idling but also when I was driving. I'm talking DEAD, no sputter, no seemingly gas supply sputter, just DEAD off. So I began diagnosing the problems myself through internet, friends, Chilton's book etc. As a woman, I love working on my car. Kind of a mystery, and great feeling of success when ya fix her up!
The following were commonly reported problems: idle air control valve, ignition control module, thermostat and gasket, mass air flow sensor, and constant control relay module and 50 Amp fuse. I replaced all of these myself, even replaced the radiator cap in case there was a problem there. None of these has fixed the problem. In fact after I put on the mass air flow sensor, the car in one block from the parts retail store to home had two bars overheating! No, I didn't blow a gasket. But, I pulled over, let it cool, started her up and got home. Now it’s in my parking place and won't start.
In addition three days ago, a guy in new Lexus rear ended me while I was at a complete stop. I let him go, because this car has 222,000 miles on it and I'm not worried about a one inch crack in the rear bumper. However, a friend of mine suggested that the fuel pump emergency switch off button may have triggered and that's why it won't start (it’s not the starter or the alternator). New battery 4/11.
Also the dealer repair shop guys said that if you put a mass air flow sensor on Sables, if it’s rebuilt, sometimes the computer won't recognize it. He said try starting with the MAF off since you don't need it. Did that, didn't work. He also said you have to remove BOTH positive and negative battery cables to reset the computer (all Chilton books just say to removed negative cable when working on the car).
It's 109/110 outside in Dallas so I'm working on this car intermittently. I went to find the reset fuel pump switch, and it's not on the wall in the trunk of this sedan nor behind the rear passenger wall. So I'm guessing its under the carpet with spare or ? I'll find that and hope it fixes current problem but...if anybody has any suggestions on two items, why it won't start and second, if it overheated, what it might be now.
Also, never go to the dealer repair shop. I knew that before but was desperate for a diagnostic tool that would fit this car. For $650, he wanted to replace the MAF sensor and the CCRM, waited 4 hours for a diagnostic for those two parts in his waiting room. I left, bought both parts for $156 and put them on myself in 2 hours. But this car I am told by AutoZone and Oreilly's parts stores requires the OBD1 diagnostic tool which they don't have to lend me. They tell me my car is too old to use the diagnostic tools they have for cars from 1996 to this date.
So anyway, hopefully today when I find the fuel pump ER shut off switch, which I will, it's only that. But, if you have ANY ideas other than what I've already tried for the kill engine problem, and the starting problem now, I would love to try them. I thought recently maybe need to replace the ECT, engine coolant temperature sensor. I appreciate your help!