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4227 Views 2 Replies 3 Participants Last post by  ImperialCrown

I have read a variety of statements regarding the 98 R/T PCM, compared to the standard (non R/T or non ACR) 98 DOHC Neon PCM. The two that interest me the most are:

1) the 98 R/T PCM has a higher rev limiter.
2) the 98 R/T PCM is tuned for higher performance.

I would like to know if there are differences and if so, what they are. I am interested to hear what you have to offer.

I am also interested in how the Mopar Performance (MP) PCM for the 98 DOHC 2.0 compares to the standard, R/T or ACR PCM's? The only thing I know about the MP PCM is that is was approximately $300 and is no longer available directly from Dodge.
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· Registered
1 Posts
The R/T & ACR PCM have the same settings for rev limiter, etc. as the other neons. The only difference is the speed limiter. In the '98 neon brochures I have, they call it 'unlimited speed', but you are, however, limited to *only* 120 MPH.

The Mopar Performance PCM (I'm running one in my R/T Coupe) has a higher redline (I think 7700 RPM), bypasses your EGR, and is noticably quicker over the stock PCM, especially when she's drinking 91 octane! Expect your mileage to drop off though, anywhere from 20-60 miles per tank :(

· Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
17,303 Posts
The Mopar Performance PCM also will pass state emissions tests as it stores OBD II monitors.
The knock sensor will let you use lower octane regular, but won't give you the maximum power.
The Mopar PCM is really only for 5-speed stick shift cars as it will light the 'ck eng' light in automatics. (It has no provision electrically to lock up the torque converter clutch).
They show up used from time to time.
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