Crazy Idle
#1
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I have a Dodge Daytona but my daughter drives a 98 Neon. I am always the one she comes to first with a problem. Sometimes I can help her. But this seems very strange to me. Her cars idle jumps significantly when she turns on the fan (heater/ac) . I also noted that I could hear her A/C compressor cycling. We were not running the ac when this occured. My first thought was the idle position sensor, but I have never thought there would be an asociation with the blower motor fan. Is this a common problem with the Neons? If you know of this please enlighten me, so I can look like a hero to my daughter again.![Confused](https://dodgeforum.com/forum/images/smilies/confused.gif)
Thanks John from Calgary AB
![Confused](https://dodgeforum.com/forum/images/smilies/confused.gif)
Thanks John from Calgary AB
#3
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Thanks for the advise- I have had trouble with the TPS on cars before but I never saw it like this. The RPMs must jump by 500 (she has no tach) I will try changing out the module. When I hear her A/C compressor cycling at idle when running the heater is that just an indication that her coolant (freon) is low?
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#4
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The compressor cycling means it's time for a recharge. The kits aren't all that expensive. The A/C kicks in to dehumidify the air when the selector is on defrost. When the A/C kicks in the radiator fan turns on to draw air through the condenser. With the increased load from the compressor and load on the alternator idle is adjusted up accordingly.
A bad TPS will cause poor acceleration or stalling when you step on the gas. It doesn't determine idle speed as far as I know.
A bad TPS will cause poor acceleration or stalling when you step on the gas. It doesn't determine idle speed as far as I know.
#5
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The compressor cycling means it's time for a recharge. The kits aren't all that expensive. The A/C kicks in to dehumidify the air when the selector is on defrost. When the A/C kicks in the radiator fan turns on to draw air through the condenser. With the increased load from the compressor and load on the alternator idle is adjusted up accordingly.
A bad TPS will cause poor acceleration or stalling when you step on the gas. It doesn't determine idle speed as far as I know.
A bad TPS will cause poor acceleration or stalling when you step on the gas. It doesn't determine idle speed as far as I know.
John