Replace a P74 to a P71 | SuperMotors.net Forums

04

04lxvicOP

Member since Feb 2011
7 posts
akron, OH, USA

Mar 29, 2011 at 3:28 PM

Has anyone replaced a pcm with a police p71 ?
What was the outcome?

JD

jdmeaux

Member since Jan 2009
525 posts
Lafayette, LA, USA
1 vehicle in the registry

Mar 29, 2011 at 6:49 PM

Contrary to what a lot of people thing,there is not much difference from the p74 and p71. The p71 has a higher idle speed, higher shift points of the trans, and a higher top end. All this is from the pcm. Changing the pcm won't do a lot of improvements. That is unless your old pcm is bad.

*******************
PROUD MEMBER of www.crownvic.net

It's just a SUPER-DUTY Mustang GT Sedan. 198K miles and still rolling HARD.

1997 Crown Victoria P71 SVT *** ex-US Marshall service (the CAR)
STOCK?? I bet it was modified.

13.26 @ 107.24 MPH 1/4 mi w/ me, tools, & full tank of 93 octane

I added CAI, NICHE 19 X 8.5 " wheels with 245/45ZR 19 rubbers, and completely rebuilt the front end with poly bushings, Kooks headers, 2 1/4inch exhaust, TCI 2200-2400 rpm Stall converter

.PLANS:: engine upgrade, 5.4L 2v stroker, rebuild interior in leather w/ buckets, thinking about turbos

04

04lxvicOP

Member since Feb 2011
7 posts
akron, OH, USA

Apr 9, 2011 at 10:13 PM

Thanks ....I am going to put a p71 in place of a p74 because the p74 is bad...
I hope it works just fine