I just bought a 95 Dodge Neon SOHC and it runs great but when I rev it in park or nuetral the rev limiter hit at exactly at 4000rpm and when I drive it in drive or manually shifting from first to second or drive the rev limiter still hits at 4000rpm, does anybody know what it might be.
When I checked for the codes using the key thing(CEL) I get codes

CODE 23** Indicates that the air temp sensor input is below the minimum acceptable voltage or sensor input is above the acceptable voltage.

CODE 24** Throttle position sensor voltage to high or low.Test the tps.

CODE 12 Problem with battery connection.Direct battery input to pcm disconnected within the last 50 ignition key-on cycles.

 

CODE 24** Throttle position sensor voltage to high or low.Test the tps.

most likely you problem

 

Ok, couple things. You shouldn't be revving the **** out of your motor in neutral or park. Second, you also shouldn't be manual shifting an auto transmission. Yes its fun, do the MTX swap, the tranny last a LOT longer.

Now, the 4k limit is usually from a bad MAP sensor, check the connector on it and see if the limit goes away. Although, the TPS might interfere with the revving, Im not sure about it, someone else will have to chime in on that. Does it limit at 4 when your in drive?

Start by cleaning your battery connections real good. Check your connections on the AIT, MAP and throttle body.

Hope this helps

 

well Im not really trying to trev the crap out of it but I was trying to pass a car up on the expressway and when it downshifted from Drive to second gear the fricking rev limiter was limiting the motor to only 4 000rpm., but it does this in Drive also. I can understand that some cars do do this in Park or in nuetral but in gear, My other neon is a 1996 2 door sane motor and it goes past 6000rpm.

 

Looks like you found your problem there .

Check the wiring to the sensor and have a look at the sensor itself.

 

F uck the Manual, who wants to waste all that time effort and money on a non MTX car. Alsoif you haven't noticed that in some parts of the US theres 2 feet of f uckin snow where a person like me usually does their tranny drops. The ATX its strong enough. And why can't you rev the engine in Nuetral? I'vedropped it in Neutral and reved it to 6,000 Rpmat stoplights to get a Ricers to race for years. Another thing I do is manually shift my Automatic in races, works great for when you get up to 80mph and it wants to shift into 3rd gear when your not even to the peak of your powerband at 5300.as soon as it shifts into second via kick downI manually put it in to second gear and keep it there till it hits 5800 Rpm around 98mph. Since I got the turbo I don't need to manually shift anymore unless I want to.

 

Dude slash your ****ing retarded sometimes...

 

Thats why you arestill a JR Mechanic because you go around calling people retards because you can't see past your own stupidity.

Whats so retarded? People push these engines up to 6500+ in circle track racing in stock form and in DOHC form the engine revs up to 7000Rpm noproblem. I do a 3 second long rev up to 6,000Rpmand I'm suddenly the retarded one.

 

Well sometimes aproblem like the 2 tennis ball size holes in my last block,but what fun it is!

 

I was just trying to say me reving it up to 6,000 for less than 3 seconds wasn't too bad. racing your doing 6,000 almost the whole way? lol