Thats something to think about. Question though, on the 96 and earlier
trucks there were 2 temp sensors. One for the guage in the dash and one for
the pcm input. Are the values you just stated going to be the same for the
96 and earlier sensors? I dont have my FSM handy to check.
It does sound cool in the am when idling though...hugeeeeee cam..lol
Greg Conner
1996 RC
3.9 hybrid
>From: "Bernd D. Ratsch" <bernd@texas.net>
>Reply-To: dakota-truck@dakota-truck.net
>To: <dakota-truck@dakota-truck.net>
>Subject: DML: Cold-Start Hesitation - Finally Fixed
>Date: Sun, 25 May 2003 11:48:45 -0600
>
>
>
>After going through a lot of different options and tests, I finally
>found the cold-start (rough running) problem on the truck.
>
>I know a few others have had this same problem and it could also be a
>fix for you...but you'll need to check first.
>
>Problem:
>On initial (early AM startup), the engine runs rather rough (like it's
>got some sort of huge cam in it) and back-fires through the intake.
>Went through TPS, MAP, O2, IAT, and a few other options as well
>(including fuel sync and distributor alignment). Everything checked out
>fine and well within spec.
>
>Solution:
>Coolant Temp Sensor was off by 4K ohm (lower than normal) causing a
>leanout condition. Remember, the CTS also works like the old chokes on
>carbureted engines (engine warm-up). Early AM CTS resistance should be
>about 9.4-9.8K ohm for my area (74-78 degrees F). Sensor was at 5.7K
>ohm...this equates to 104 degrees at cold-start (not good). PCM thought
>engine was warmer than actual temp and was leaning out the fuel a little
>early.
>
>No more backfire or lean-out condition.
>
>- Bernd
>
>
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This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:21 EST