The car cranks great when cold. But when you drive it for a while, and get it to oper. temp and let it cool down for 30 min to an hour and try to crank it again it takes 3 or 4 trys to start it. If you turn the ignition on and then off two or three times and then crank it, it fires right up. Please help!!!
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Re: 99 olds silohuette/ Hard to start
When you turn the key to start position that 2 or 3 times does starter click? or does it do nothing? If it clicks starter selanoid on starter is bad, If it don't click at all its ignition switch thats bad.
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When you shut off a fully warmed up engine, the temp rises as all water circulation has stopped. This extra high temp can cause electronic parts to fail which then work again as they cool. Somewhat rare, but possible coil/module or crank/cam sensor issue. Also may have leaky injectors which bleed down when you stop and flood the engine. Sitting lets excess fuel evap and then will start again. Just my thoughts.
Could be a number of things, but I would start with the engine coolant temp. (Ect) or air temp sensor. These will control your air fuel ratio and make it hard to start. I had a vehicle which started great when cold, but started hard when warm.
Check your Fuel Filter, especially if your in a cold climate that has already reached freezing temps. If you have any moisture in your fuel system and the freezing temps have arrived the filter and injectors can freeze up slightly causing this type of problem. If this was happening in warmer temperatures check the fuel system for pin hole leaks that could be allowing the air into the system.
Replace the thermostat. If thermo is stuck open, coolant only heats up when there is no flow over radiator(idle) and then cools down when driving. Also, check coolant level, same response as stuck thermo.
Just finished fixing my daughters 1999 taurus heat. It would blow warm only when running down the road. At idle it blew cold. I started with replacing thermostat, and water pump because they are the easier fix. Still did not help. Then I replaced the heater core. A daunting job but not that hard to move the dash slighly out of the way to replace. There is a good write up at tarusclub.com. After that, heat was better but at idle, it would still blow cool sometimes. Researched and found answer. Park car on the steepest hill you can find with front of car up. Start car and take off reservoir cap. Let car warm up and keep rpms about 1500. After a while the fluid will come running out of the car and all over the place but it will bring air bubbles with it. Reduce rpm, add more fluid and repeat about 3 times. It will make a mess but after that, the heater works perfectly. We get heat long before the temp gage indicates any and it never blows cold unless you lower the temp.