Shut down at 6400rpm

[scottrachel01]

Out playing saturday I hit 6400rpm and it shut down hard almost felt like it was going to die.I thought the pcm shut down at around 6900 or 7000. Any ideas?

[dodgeneonACR98]

A stock Dohc rev limiter is at 7400 rpms and a stock Sohc rev limiter is set at 6400 rpms. There is no real reason that I know of to flog a sohc up to the 6400 rev limit. They make peak power at 6000 rpms. So shifting at 61-6200 rpms would be the best time to shift. I think that the stock Dohc makes it's peak power at 6500 rpms. Most people who drag race neons usually shift their dohc at 7000 or just above.

An aftermarket computer will raise the rev limiter. As in my case the Mopar PCM raised my rev limiter from 7400 to 7600 rpms. AF/X PCm's will raise it slightly more. And also have more advanced timeing. The main reason I changed PCM's was not to rev it to 7600 rpm's but instead I wanted to eliminate the 135 mph cut off. You see there are two restrictions here. We have both a rev limit and a speed limiter. Just in case you are wondering your stock MPH cut off should be around 118 mph. Some even shut down at 110. Early ACR's did not come with a MPH cut off, but when they made them available for the general public after 95 they put in the 135 mph cut off. The newer R/T with the sohc magnum motor will also cut off at 135 mph. The older R/T's are the same as other stock neons. 118 mph. Hope this helps you out! Later

[scottrachel01]

My motor is a dohc could it for some odd reason have a sohc pcm?

[dodgeneonACR98]

Sounds like it might have! Take the car to a dealer and have them run a check on your Vin # and they can tell you what part # should be on the Dohc and Sohc PCM's.
Then see if the PCM is labeled with the Dohc or Sohc Part #'s.

The numbers on my Stock Dohc ACR PCM is P05269825 thats on the sticker on the PCM. I imagine yours is the same. Just tuned different. The P# for the correct Mopar Pcm for our cars is P5007038 and the Sohc MP PCM ends with 037. Sorry I don't have a 97 sohc P3 for the pcm. However Im almost 100% sure that your PCM P# should match mine stock if it's correct. Don't quote me on that tho.

Maybe someone with a Stock Sohc PCM and a Non ACR dohc can shed some more light onto this subject. Good Luck!

[scottrachel01]

The sticker on 97 with the shut down at 64k is P/N 05269998A. On my 98 sport the sticker is P/N 05293064A. Both are 5 speed DOHC.

[dodgeneonACR98]

Swap them out if they have the same harness and see what happens.

[95moparracer]

maybe acr, there expresso and not r/t or acr! that could be it honestly!

[dodgeneonACR98]

You know 95Moparracer, I was thinking that but I have never seen where the Rev limiters were different. Speed limiters yes, but the rev limiter no. Guess we are well on our way to finding out.

If all else fails Scott, go to modern performance and order you a Mopar PCM for about 220 bucks. Then you wont hit a wall until 7600 and you will never reach a speed limiter. Good Luck!

[donald7150]

yeah my 97 is just a highline with the DOHC 5 speed and I know can hit 7400
my car is identical to scottrachel even the wheelcovers, except for green paint and factory spoiler

Also, part # 05269998A is a '97 DOHC 5 speed PCM
05269991A would be the SOHC 5 speed pcm

5293064A is also a '98 DOHC PCM with a 'DD4' trans (DBB = manual, DGC = AUTO)
not sure what code DD4 means my guess is manual trans

scottrachel i can decode your vin for you if you send it to me

[95moparracer]

was just throwing in my cents lol... basically an uneducated guess :P

[dodgeneonACR98]

was just throwing in my cents lol... basically an uneducated guess :P :thatfunny :thatfunny :thatfunny :thatfunny NO WAY!! :D

One thing for sure we are stocking up on Stock PCM Part #'s LOL :rck:

[donald7150]

hey if you guys need anything to do with chrysler part numbers for anything I got you covered, even the last 8 digits of your vin I can decode your VIN very intensly

example: wd630777

APAS MONOTONE PAINT BA7S 83 AMP ALTERNATOR BCUS 450 AMP MAINTENANCE FREE BATTERY
BRAS POWER FRONT DISC/REAR DRUM BRAKES CGDS FRONT HEIGHT ADJUST SHOULDER BELTS CGWS NEXT GENERATION FRONT AIR BAGS**
CKAS CARPETS - FLOOR AND CARGO AREA CKPS TRUNK DRESS-UP CUFS FULL LENGTH FLR CONSOLE W/CUPHOLDERS
DBBC ALL MANUAL TRANSMISSIONS EAAC ALL ENGINES GACS TINTED GLASS WINDOWS
GBBS TINTED WINDSHIELD GLASS GFAS REAR WINDOW DEFROSTER GNAS REAR VIEW DAY/NIGHT MIRROR
GNFS DRIVER SIDE SUN VISOR W/MIRROR GNLS PASSENGER SIDE SUN VISOR GUFS DRIVER REMOTE, PASS MANUAL MIRRORS
GVAC ALL VEHICLES W/O POWER MIRRORS GXTS REAR DOOR CHILD PROTECTION LOCKS HGDS DELUXE INSULATION GROUP
JAAS INSTRUMENT PANEL JCBS 120 MPH PRIMARY SPEEDOMETER JHAS VAR INTERMITTENT WINDSHIELD WIPERS
JJAS CIGAR LIGHTER JJFS SINGLE LOW NOTE HORN JKES REMOTE TRUNKLID RELEASE
KSAS BRIGHT CHROME - HOOD BADGE DODGE K3WS BRIGHT WHITE - MOLDING BODYSIDE LDCS TRUNK LAMP
LMAS HALOGEN HEADLAMPS MUDS DODGE I.D. BADGE MVPS DODGE BADGE
MV3S NEON BADGE NBKS EVAP CONTROL SYSTEM NFMS 12.5 GALLON FUEL TANK
QW7S BRIGHT WHITE CLEAR COAT RAAC ALL RADIO EQUIPPED VEHICLES SBAS POWER RACK AND PINION STEERING
SCAS STEERING WHEEL SDCS 4-WHEEL INDEPENDENT SUSPENSION TAAC ALL TIRES
TBCS COMPACT SPARE TIRE TJYS P185/65R14 BSW AS TOURING TIRES XFAS -35F PROTECTION ANTI-FREEZE
YAAS BUILD TO U S MARKET SPECIFICATIONS YCBS MOTOR VEHICLE THEFT PROTECTION 1AAS U.S. DEALER RETAIL
131S ZONE 31-BOSTON 607S CONNECTICUT STATE CODE 907S CONNECTICUT STATE CODE


Optional Equipment

Code Description Code Description Code Description
*L7 CLOTH LOW-BACK BUCKET SEATS -AZ AGATE BTAP ALL VEHICLES W/O ABS BRAKES
CLE FRONT REAR FLOOR MATS CSRP PASSENGER ASSIST HANDLES DD4 5-SPEED PERF. MANUAL TRANSMISSION
DLTP 2.8 OVERALL TOP GEAR RATIO ECC 2.0L 4 CYL DOHC 16V SMPI ENGINE GREP LEFT MIRROR
GZFP RIGHT MANUAL MIRROR HAAP AIR CONDITIONING JFHP TACHOMETER
LNJP FOG LAMPS MDAP FRONT LICENSE PLATE BRACKET MGBP HOOD POWER BULGE
MVJP SPORT BADGE MXDP TRUNKLID SPOILER NAE CALIFORNIA EMISSIONS
PW7 BRIGHT WHITE CLEAR COAT RBS AM/FM CASS RADIO W/CHANGER CONTROL RCGP 6 SPEAKERS
SHAP FRONT STABILIZER BAR WH6 14X6.0 ALUMINUM WHITE WHEELS YGEA 5 ADDITIONAL GALLONS OF GAS
ZAUP SPRING - LEFT REAR ZCFP SPRING - LEFT FRONT ZNUP SPRING - RIGHT REAR
ZRFP SPRING - RIGHT FRONT 0KWA FAM: PL TRACKING: 70602S02 0K6A FAM: PL TRACKING: 70724S08
2DGA CUSTOMER PREFERRED PACKAGE 2DG 23G CUSTOMER PREFERRED PACKAGE 23G 3C2A 2.0L DOHC BONUS DISCOUNT
3VTA CUSTOMER PREFERRED DISCOUNT

its a bit messy what I copy and paste it but Im sure you can see all the options

[scottrachel01]

Hey guys I tried it again and at about 6k it sounds and feels like the motor is topped out I'll switch the pcm with the other one this weekend and see if it makes a difference.The rpm's jump quick from 2k to 5k then they seem to come alot slower.

[scottrachel01]

I had a crazy weekend!! Switched the motor into a nicer body on sat. Exhaust manifold bolts were broke, had to drill and retap the head to put the header on. Check engine light was on, cam crank sensor, Timing belt was one off at the crank and the egr valve was sticking causeing crappy idle. We unhooked the egr vacuum hose and plugged it. (no engine light) Now it runs great well passed the 6400 shut down!!! I'm amazed on how quick this car is now!!! Will post pics later.

[TX_Firehawk]

You guy's and your 7+K RPM's are CrAzY!! Or maybe I am just jealous. Meh I guess I need a 5 speed after all.

[95moparracer]

lol in my old sohc i shifted at 5800 bout and in my srt-4 5500 is like optimal shift point!