Mazda RX-7 Starting in the 1970s, the uniquely powered RX-7 helped put Mazda on the performance car map.

bouncing idle

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  #1  
Old 07-18-2006, 09:33 PM
isl_cruiser's Avatar
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Join Date: Apr 2006
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Default bouncing idle

whastup! when i start my car up in the morning or after its been sittin for a while my idle bounces, now im use to that and figured its just like a warming up procedure. but lately my car has had a boucning idle throughout my hole trip...whats goin on, it sounds like ***...also my idle sits at 1500 when not in gear and 1000 when it is, is this normal...doesnt sound like it
 
  #2  
Old 07-18-2006, 11:16 PM
Join Date: Jun 2006
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Default RE: bouncing idle

Check your TPS, it might be out of spec.
 
  #3  
Old 07-18-2006, 11:40 PM
Join Date: Jul 2006
Posts: 71
Default RE: bouncing idle

When was the last time you did a spark plug and plug wires change? Have you checked the gap on your spark plugs? Those would be my first two thoughts. After that maybe a fuel pump. That is if you have crossed off the electrical/ computer stuff. Or water in the fuel. THose are the mechanical systems that bounce RPMs.
 
  #4  
Old 07-19-2006, 12:39 AM
Join Date: Jun 2006
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Posts: 50
Default RE: bouncing idle

Spark Plugs on a Rotary cannot be gapped. THey come from the manufacturer already pregapped.
 
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