check engine light on after motor/trans mods - Page 2 - PerformanceTrucks.net Forums

GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |
Sponsored by:
Sponsored by:

check engine light on after motor/trans mods

Reply

Old 11-08-2010, 10:03 AM
  #11  
Launching!
 
cams 98 silverado's Avatar
 
Join Date: Mar 2009
Location: Bolingbrook, illinois
Posts: 242
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Just wanted to chime in about the torque converter shudder when the verter is in lockup. are you driving in 4th and then the lockup occurs followed by shudder? usually shudder is from pressure being low, so the TCC circuit needs adjusting. pressure loss is caused by worn valves, or something in the tune is telling it not to increase pressure. My online trans book tells me if a shop verifys the pressure and given there arent worn valves in the circuit the torqe converter should be replaced, so being yours is new, i would look at pressure. and in the HD-2 kit, did you do anything to the TCC valve? as for the codes, those codes pertain to the TCC circuit. so something maybe electrical is going on, and somehow fixed itself? hehe, wish my truck did that!
cams 98 silverado is offline  
Reply With Quote
Old 11-08-2010, 10:33 AM
  #12  
Where's the Beef?
iTrader: (8)
 
viciousknid's Avatar
 
Join Date: Jan 2007
Location: Dover, Oklahoma
Posts: 9,382
Thanks: 0
Thanked 0 Times in 0 Posts
Default

You'll need to tune the TCC and lockup speeds if you haven't already. That should take away the shudder. It's trying to lock/unlock repeatedly most likely.
viciousknid is offline  
Reply With Quote
Old 11-08-2010, 10:38 AM
  #13  
On The Tree
Thread Starter
iTrader: (1)
 
Join Date: Jul 2008
Location: Mass
Posts: 173
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Yeah the truck needs to be tuned. I believe the codes cleared after the truck went down the road with the boost valve and everything in correctly.

We drove it yesterday with hardly any shudder when locked up. however, the neutral safety switch needs to be adjusted.
Cook is offline  
Reply With Quote
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
tweeder
GM Engine & Exhaust Performance
3
09-18-2015 11:02 PM
Ketis
Trucks and SUV Classifieds
6
07-23-2015 12:37 PM
bk_cauley
GMT K2xx Trucks General Discussion
5
07-19-2015 09:56 PM
bsgiffor
GMT 800 & Older GM General Discussion
1
07-19-2015 11:14 AM
hackrst
FORCED INDUCTION
11
07-11-2015 11:17 AM


Thread Tools
Search this Thread
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: