Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

RPMs not dropping between shifts?!?!

Thread Tools
 
Search this Thread
 
Old 03-25-2004, 06:53 PM
  #1  
Member

Thread Starter
 
camaro_V6_Tuner's Avatar
 
Join Date: Apr 2003
Location: PA
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Car: 2002 Trans Am WS6
Engine: LS1
Transmission: T56
Axle/Gears: 4.10
RPMs not dropping between shifts?!?!

After my auto -> manual swap, for some reason the RPMs are not droppping down when I push the clutch in to shift. Does anyone have any idea what this could be?

I did not change the computer or PROM when I did the swap, I left the 4 prong connection and the other little on that went into the auto hang open, and I left the black and the orange/black wires in the console open too. Do I have to do anything with these wires?

My car is an 87 v6

Can anyone help me out?
Old 03-25-2004, 07:30 PM
  #2  
Supreme Member

iTrader: (2)
 
blue86iroc's Avatar
 
Join Date: Jul 2001
Location: Western PA
Posts: 1,000
Likes: 0
Received 1 Like on 1 Post
Car: 1986 IROC-Z
The connector that plugged into the automatic transmission was for the torque converter lockup; the computer completes the circuit, but I don't think a disconnected lockup wire would cause any engine RPM problems.

If my memory serves me correctly, the wires in the console were for the backup lights. I don't remember the colors off-hand.

Can you even drive the car? It sounds mechanical... like the clutch isn't disengaging or something. If the engine is running, then it's getting air through the intake. The only thing the computer can do to affect air intake is with the IAC motor, but I doubt that it can let THAT much air in.

Sticking throttle cable?
Old 03-25-2004, 07:54 PM
  #3  
Supreme Member

 
89RsPower!'s Avatar
 
Join Date: Apr 2002
Location: New Jersey
Posts: 3,552
Likes: 0
Received 5 Likes on 5 Posts
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
when i did my auto the 5 speed swap i had the same problem, it was because the throttle return spring by itselt wasnt strong enough to pull the throttle back, but with the assistance of the kickdown cable it use to return just fine.
Old 03-25-2004, 08:35 PM
  #4  
Member

Thread Starter
 
camaro_V6_Tuner's Avatar
 
Join Date: Apr 2003
Location: PA
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Car: 2002 Trans Am WS6
Engine: LS1
Transmission: T56
Axle/Gears: 4.10
89RsPower!, what did u do to fix the problem?? can you give me more info?
Old 03-26-2004, 04:07 PM
  #5  
Supreme Member
 
dankhound's Avatar
 
Join Date: Jan 2002
Location: Bloomingdale,IL
Posts: 1,322
Likes: 0
Received 1 Like on 1 Post
Car: 91 RS
Engine: 305 Tbi (L03)
Transmission: 700r4
Get a stronger spring. Just take the original one to the parts store and theyll be able to get you a shorter one that will work.
Old 03-27-2004, 10:15 AM
  #6  
Supreme Member

 
89RsPower!'s Avatar
 
Join Date: Apr 2002
Location: New Jersey
Posts: 3,552
Likes: 0
Received 5 Likes on 5 Posts
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
i added a second spring, 2 throttle return springs never hurts, with 2 you dont have to worry about it breaking at wot and having the throttle get stuck wide open
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jklein337
Tech / General Engine
2
09-19-2018 06:23 PM
someone972
Transmissions and Drivetrain
6
08-30-2015 12:52 AM
crazynights
Transmissions and Drivetrain
10
08-21-2015 06:53 AM
dhonda200
Transmissions and Drivetrain
6
08-11-2015 11:50 PM



Quick Reply: RPMs not dropping between shifts?!?!



All times are GMT -5. The time now is 11:17 AM.