Always starts cold. does not do it all the time. no codes.cam and crank sensors replaced.plugs and coils new. motor spins but will not start until it sits for about a 1/2 hour. heater vent air excessively hot. Temp gauge normal. Any ideas
There is a blower control resistor (manual system) or a blower transistor (automatic temp system) located behind the glove compartment in the HVAC box and this is a high failure item.
Testimonial: "I'm sorry maybe my post was unclear. The heater works fine. The engine will not start after running for a period of time until the car sits for approx 1/2 hr. It turns over fine but that is it. Tha=e cam sensor, crank sensor, plugs, and coils have all been replaced. Runs like a clock. But after running for a period of time and shut off, it will not restart until it sits for at least a 1/2 hour. When running the air from the heater vents seems inordinately hot [ much hotter than ever before]. Trying to figure out if possibly the temp sensor could be going bad and sending a false signal to the comp. The temp gauge reads fine, but hard to tell with the cold weather if the fan sould be coming on. There are no codes. It just has to sit for 1/2 hr before it will start again."
Thank you O Mclean. The head or gasket is not the problem. They are fine. I'm wondering if the tempreture sensor could be sending a false signal to the comp telling it that the engine is cold when it is actually at full running temp. And wether or not this could stop it from starting by sending the wrong air/fuel mixture. after it sits for a 1/2hr it starts right up and runs perfect. I get no codes. Been driving us nuts for 3 weeks. The real problem is that it does't do it all the time. I put 450 miles on it and it didn' do it once, then all at once it will do it again. I'm thinking that it has occured on the only warm days we've had im northeast pa in the last month. That's why the question about the temp sensor. I have read in some forums that on occasion when a temp sensor starts to go bad that it will cause a warm engine not to start without throwing codes. Any experiance with this anywhere?
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SOURCE: the air conditioning compressor will not engage
did you reseet the vent positions?. It could happen but its a long shot the system has lost its charge and the safety switch is keeping the compressor from running, or the safety sw itself is bad.
SOURCE: crank position sensor
if you have the 2.4l it is located behind the timing belt on the crankshaft. possible causes include timing belt teeth seperated or balance belt teeth seperated and taking out the crankshaft sensor and sensor plate. this is no easy task for the home mechanic.
SOURCE: 2000 Elantra Overheating
First when vehicle is cold like in the morning check and make sure that the vehicle has enough coolant/ antifreeze in radiator and reservoir. If coolant is need use a 50/50 mixture of water and antifreeze. You will need some time to do this let car run at idle until the temp guage is in the middle NOT+ normal operating temperature. At this point if the thermostat should be in the open position. Let vehicle run and check to make sure that radiator fan comes on. This should come on when guage is about midway/half way. If temperature rises above half going to h/hot and fan doesn't come on, you either have a BAD FAN BAD FAN SWITCH BAD FAN RELAY OR BLOWN FAN SWITCH FUSE. You will need to check all of the following I will help if its needed. If fan comes on and doesn't go off and vehicle continues to get hot even with fan running. Feel radiator hoses and see if the lower radiator hose is cool/cold. If it is you have thermostat that stuck closed. Replace thermostat and fix problem. If all the above is good and vehicle continues to over heat. THE BAD NEW IS THAT YOU MAY HAVE A BLOWN HEAD GASKET /CRACKED HEAD /BROKEN WATER JACKET. Basically you will need a HEAD JOB at least a head gasket. ONe tell tail sign of this is oil looking like milkshake/chocolate milk-a creamish while residue in oil or antifreeze. Contact if you need hel0p. Good Luck and thanks for using FIX YA
SOURCE: 2004 Hyundai Terracan, 2.5 turbo diesel, manual.
right renew the glow plug timer/relay if you put a meter on the glow plugs when cold and turn ign on (with help) it should supply power for a about 20 secs ,time depends on outside air temperature ,if all else fails then do a colin --- use a push button switch,wired to a relay so glow plugs can be operated by pushing the switch which you will mount on the dash ,cant beat a manual overide system
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SOURCE: 2004 Hyundai Santa Fe 2.7 all wheel. Crank sensor
Hi
On the 2.7 engine it is located beside the starter. You will have to remove the starters heat shield to gain excess to the crank sensor.
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