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1997 neon problems????
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Posted by: neonchick1997

I own a plymouth neon. it wants to die when i start it so i press the gas around 1500 rpms and i let off and it will sometimes drop to under 1000 rpms or die. Whats wrong and what can i do?? plz help . Also my engine light is on too. i had my throttle body senser changed.

Posted by: MadScientistMatt

First figure out why that light's on. Take it to a place like AutoZone or Pep Boys - they can often put it on a diagnostic tool for free. Then get back to us and let us know what they found.

Posted by: Slow Nova

If they don't do it for free, you can 'rent' the tool for free at Autozone...just pay a $180 or so deposit that's 100% refunded when you return it.

Posted by: GMR

Some chryslers can scan themselves and display the code on the digital odometer screen. Turn the key on and off three times fast(just into the on position without turning the engine on) and leave the key in the on position on the third time. This will flash the codes, however only certain years will do this, im not realy sure wich ones though.
Was it doing this before you changed the throttle sensor?
Im not too savy on chrysler electronics, but on some vehicles, you have to recalibrate the sensor after you replace it.
Kind of sounds like the idle control motor could be bad or clogged and needing to be cleaned also.
But first let us know what the code is.

LS

Posted by: StoneFox

Quote:

Originally Posted by GMR


	Some chryslers can scan themselves and display the code on the digital odometer screen. Turn the key on and off three times fast(just into the on position without turning the engine on) and leave the key in the on position on the third time. This will flash the codes, however only certain years will do this, im not realy sure wich ones though. Was it doing this before you changed the throttle sensor? Im not too savy on chrysler electronics, but on some vehicles, you have to recalibrate the sensor after you replace it. Kind of sounds like the idle control motor could be bad or clogged and needing to be cleaned also. But first let us know what the code is. LS

Its only 95 and older cars that will do that, 97 is OBD II

Posted by: GMR

Yea, its kinda of weird Ive done it to some cars and worked and other cars it hasnt. Its worth a try, Im pretty sure it works on some OBDII cars because I did it on a 2000 caravan and it worked, P1400 or some OBDII code like that.

from allpar.com

http://www.allpar.com/fix/codes.html

LS

* On the 300, Magnum, and Charger, you cannot see the codes without a reader. Most codes are visible with a standard code reader. The dealer can see more codes (those that are not required by Federal law).
* You may have to have the parking brake firmly set for the codes to show! (Thanks, Steven Midway)
* Codes are usually displayed on digital odometers on newer models.
* On many 2001 and newer models, holding in the trip odometer reset button while turning the key to RUN will start a self test, with a readout on the odometer. It will also activate all instrument panels, one at a time. We do not know if this will show computer codes, or whether it only tests the instrument panels. At the end, it may show a few odd codes that are firmware versions and not error codes.
* On most cars, the codes will read out if the engine light is on - all you have to do is put the key into the RUN position.
* Normally, to get codes, you put the key on OFF and then rapidly do OFF-ON-OFF-ON-OFF-ON (on some cars you have to do four or five, not three, OFF-ON cycles). On our test 2002 car, the key did not go back to unlock, so it was ACC-ON-ACC-ON-ACC-ON.
o Jon Yoon: The 1998 Caravan does the same check engine light code trick, but it also does an instrument diagnostic check if you hold the trip and reset buttons and turn the key to the run position and wait 5 seconds. This helped me figure out that my input and output speed sensors were broken but the actual speedometer dial could move.
o For the 1999 Jeep Grand Cherokee and up, you do the switching the key on and off 3 times, but not quickly. You turn it to on so the odometer turns on, turn it off, and then back on, wait for the light to turn on, etc. On the fourth time you'll get a code, or you'll get the word "done." (Monica MacDonald)
* A loose gas cap may light up the Check Engine light! (Thanks, Lyn Clark)
* When the computer indicates major failure, it can activate Limp In mode, which guesses about data to compensate for sensor failure, allowing you to get the car to a mechanic. One major symptom of this is the transmission sticking in second gear. This is a feature!
* 2002 Ram, put transmission in neutral, parking brake on, then do the acc-run key sequence 3 times.
* Dan Stewart wrote about the 1999+ Voyager/Caravan with digital gear selection display:
o There are 2 functions that can be accomplished with the key-on sequence. Get Diagnostic Trouble Codes by placing the key into the ignition. Push and hold the both the "Trip" and the "Reset" buttons with the left hand and turn the key to the "ACC" position (first position between "LOCK" and "RUN"). Continue to hold both buttons in and count to 5. Release both buttons, display should read trip mileage instead of total mileage. Push the "TRIP" button and the odometer will display DTC'S in rotating sequence instead of displaying total mileage.
o The second function is an instrumentation diagnostic. Place key into ignition, press and hold both "TRIP" and "RESET" while turning the key to the "RUN" position. Continue to hold both buttons in until odometer displays "CODE". Release buttons. The display will then display "999". Afterward it will display "CHECK 0" and test the analog gauges. It will then display "CHECK 1" and test the digital displays

Posted by: neonchick1997

Now its acting fine. Stupid CAR!!!but i like it. ill change the o2 senser soon.

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