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My Hyundai accent 1996 1.5L battles to start in the mornings(cold start)after starting it goes to 2500 revs. and down again to 0 revs and so on until it is hot.

I did replace the air flow sensor but it is still the same every morning

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

hiseyj
  • 99 Answers

SOURCE: 2000 maxima won't stay started on a cold morning

Have the plastic intake manifold and gasket replaced. I have posted this fixed at least once before and have seen it numerous times.

Posted on Nov 29, 2008

michigan man
  • 3533 Answers

SOURCE: At startup my 94' F150 will oscillate from high to low idle

I had this problem once on an econoline van and it was the plantum gasket but before you change this check all the vacuum lines and get a digital volt meter and test the voltages on the mass air flow sensor and if you have to change the plantum gasket auto zone can print you out a diagram stating all you have to remove to replace it

Posted on Jan 09, 2009

  • 566 Answers

SOURCE: I have a Hyundai Santa Fe 2004 that will not start

hi thanks for reply may i suggest you check your engines COOLANT TEMPERATURE SENSOR this is not the temp sender unit which operates guage but a sensor which relays temp of coolant ie cold to the ecu and so informs for cold start required ! on older trucks/vehicles this was done by manual device on pump excess fuel delivered then when started auto cuts off same princple but now auto thro ecu+sensor if you had said smoke was heavy blue/blackish when engine eventually started ? this would have certainly been one or two glow plugs not working at optimum however? this seems not the case on your engine so points to ctsensor peugeot use a cable operated coolant sensor which works ok but yours is auto elec so may i suggest 1st check sensor wiring/plug are secure/clean also this sensor is screw into coolant engine block and looks like larger version of temp sender ? which if you check your manual it should give location and is easy enough to change ? hope this info helps ?

Posted on Dec 13, 2009

  • 294 Answers

SOURCE: AC will blow cold air for a few minutes then start

you have moisture in the system this causes your expancion valve to freeze up an stop working, thats why it works for sort time and when it de-freezes stars working again. you need to do a EVAC & RECHARGE with a good AC service equipment, specially attention to pull vacumm por at least 20minutes so you get all moisture out of the system.
Good luck

Posted on Jun 05, 2011

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ghost4548
  • 776 Answers

SOURCE: Hyundai Tucson a/c starts out

The issue you describe can be caused by several possible conditions. The best advice I can offer is take the vehicle into an authorized Hyundai Service Department to have it properly diagnosed.
The worse thing about chasing parts is you may or may not just get lucky on the repair. Then again you may end up shelling out $100's of bucks before you actually hit on the cause.
Possible Causes
1. Malfunctioning thermostat in the evaporator - monitors evaporator temperature so it doesn't freeze over.
2. Malfunctioning A/C control head (panel)
3. System is possibly UNDERcharged (insufficient refrigerant)
4. Malfunctioning Tripple Switch (the switch monitors pressure in the system: i.e., if pressure is too high, it will shut down the A/C; if pressure is too LOW, it will shut down the A/C) If this switch is malfunctioning, it can cause the symptom you describe.
5. Engine Coolant Temperature Sensor malfunction - if the sensor is lying, telling the engine computer that the temperature of the engine is above 230 degrees, the computer will shut down the A/C.
This is why you should have the problem properly diagnosed.
Hope this helps.

Posted on Jun 28, 2011

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