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neon revs up by its self! throttle sensor? #666290 04/10/10 07:11 PM 04/10/10 07:11 PM
Joined: Aug 2006 Posts: 1,349 warfordsburg, PA dirt OP pro stock
dirt OP pro stock Joined: Aug 2006 Posts: 1,349 warfordsburg, PA	2004 neon . it just started reving up with out me giving it any throttle. i turned it off before it got too far and tried again but it will go past 4000 rpm by its self. could it be the throttle position sensor or something else? i had an 86 daytona do that one time and it was the sensor. any ideas? thanks

Re: neon revs up by its self! throttle sensor? [Re: dirt] #666291 04/10/10 07:29 PM 04/10/10 07:29 PM
Joined: Jan 2003 Posts: 12,053 Benton, IL. D DaveRS23 Special needs idiot
DaveRS23 Special needs idiot D Joined: Jan 2003 Posts: 12,053 Benton, IL.	Check the connecting bellows between the intake manifold and the air box. The throttle body is mounted on the air box and if the bellows has a leak then the RPMs take off uncontrollably. Master, again and still

Re: neon revs up by its self! throttle sensor? [Re: dirt] #666292 04/10/10 07:54 PM 04/10/10 07:54 PM
Joined: Apr 2003 Posts: 12,234 Looking for a way out of Middl... IMGTX I Live Here
IMGTX I Live Here Joined: Apr 2003 Posts: 12,234 Looking for a way out of Middl...	Check the Tube going from the EGR Valve to the intake manifold. They will come loose and the engine will take off. As far as the electronics can tell the engine is getting air so it feeds it more fuel and apparently ignores the TPS. It's under the Throttle Body next to the battery area. Hope it helps.

Re: neon revs up by its self! throttle sensor? [Re: DaveRS23] #666293 04/10/10 09:53 PM 04/10/10 09:53 PM
Joined: Jun 2004 Posts: 3,378 St. Charles, MO wingman Uncreative Title
wingman Uncreative Title Joined: Jun 2004 Posts: 3,378 St. Charles, MO	Quote: Check the connecting bellows between the intake manifold and the air box. The throttle body is mounted on the air box and if the bellows has a leak then the RPMs take off uncontrollably. The bellows seal with a big hose clamp on each end. Check the clamps for tightness, and the bellows itself for cracks or holes. 1969 Dodge Coronet Super Bee 383 A4 1970 Plymouth Road Runner 440 FC7 (sold)

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