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02:42:37 - 12/29/2024
Dakota Performance
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Shawn
Gen III
 
5/20/2001
20:26:52
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 Subject: New TB/WOT Shift Problems
IP: Logged
Message:
I just put on both a Flow Metrics 50mm TB and had my PCM reflashed by Leach.
Well, I know they bumped the Rev limiter made other changes to the PCM,
unfortunately I need to call them to give me the exact numbers. My problem
is this, since replacing the TB the throttle seems sticky at times. The
shifting at half throttle kicks ass but at WOT it almost feels like I'm
bumping the Rev limiter before shifting, this is right around 5k RPM's. I'm
hesitant to really get on it because I had the PCM setup for a PowerDyne
Supercharger, but it isn't here yet. At WOT it sort of feels like the fuel
is cutting out at around 5K, if I let up a little it will shift and then
pull HARD until around 5K again. I believe the Rev limiter was set to 6500
RPM's so this concerns me.
I made several changes this weekend. Put the new TB on, replaced the Fan
Clutch with a Black Magic electric, and dropped the new PCM in. I drove
about 100 miles at varying speeds on both the highway and in the city and
then in traffic (checking the Fan out in Atlanta traffic;-)). The truck
pulls a LOT harder when I get on the gas but at WOT the shifting scares me
so I back off.
I know the transmition has linkage on the TB and was wondering if that
could be the source of the sticking issues. I am also wondering if maybe
I'm getting lean at WOT and starving of fuel, the reason I'm curious is that
the PCM was setup for the PowerDyne with a new fuel pump. On two occasions
the MIL light flashed when this occurred at WOT, only for a split second.
Currently, while waiting on the Supercharger I'm still using the stock
airbox and filter, that's why I'm wondering about whether I'm running lean
and that's causing the engine to cut out.
Currently the truck is setup as follows:
5.2L 318
180 T-Stat
Black Magic Electric Fan (no fan clutch)
Flow Metrics 50mm Throttle Body
Gibson Dual Cat Back
Stock Airbox (until either the SC or the K&N FIPK I ordered shows up)
Leach Custom PCM setup for the SC
93 Octane Fuel
Any help or advice would be appreciated!
Shawn
98 5.2L 4x4 CC
|
Yea
Dodge Dakota
JOIN HERE
6/03/2005
23:22:52
|  RE: New TB/WOT Shift Problems
IP: Logged
Message:
Yea
|
Mopar318
Dodge Dakota
JOIN HERE
6/05/2005
00:11:12
| RE: New TB/WOT Shift Problems
IP: Logged
Message:
I would not go more than 5500 RPM on stock crank and pistons for the 318.
|
Mopar4.7
Dodge Dakota
JOIN HERE
6/05/2005
12:14:15
| RE: New TB/WOT Shift Problems
IP: Logged
Message:
If the original poster has the Leach flash, he must be referring to the 4.7. No problem going to 6500 with that. 4 year old needless advice...
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