Engine goes into Closed Loop within the first 1-3 minutes of operation.
Yes, a cooler intake charge (and engine temp) will gain you a few more
ponies, and there are ways to help keep that performance. The IAT sensor is
the easiest one to modify the signal on. Install (solder) a 4.7Kohm
resistor inline (Black/Blue wire) - this will alter the signal back to the
PCM - translating into about 20 degrees cooler on the intake charge.
- Bernd
-----Original Message-----
From: Dan Kramarsky [mailto:dkramarsky68@yahoo.com]
Sent: Thursday, September 18, 2008 6:49 PM
To: dakota-truck@dakota-truck.net
Subject: DML: Cold engine puts out more hp/tq...
DMLers,
I have notice that within the first 3 to 4 minutes of driving in the
morning, my truck is real neck snapper!! lol. It very apparent that I
get about 10 to 15 more HP within the first 4 minutes of driving the
vehicle after it has rested for several hours.
Is this due to PCM being 'open loop' mode until engine reaches operating
temperature and then switches to 'closed loop' mode?
Any way to get that first 5 minute performance... all the time ?
Dan K.
Vehicle 1: 1992 Dodge Dakota Club Cab LE Color: Two-tone silver Engine:
5.2L EFI Mods: March pullies, K&N Filter
Photo: http://static.flickr.com/42/84856795_c18903d10f.jpg
Vehicle 2: 1993 Ford Crown Victoria LX Color: White Engine: 4.6L EFI
Mods: none yet.
Photo: http://farm4.static.flickr.com/3098/2726734706_3f511ec702.jpg
This archive was generated by hypermail 2b29 : Wed Oct 01 2008 - 00:13:23 EDT
