LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

PCM question

Thread Tools
 
Search this Thread
 
Old Oct 14, 2004 | 02:11 AM
  #1  
Bad64chevelle's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 246
From: Bordentown NJ
PCM question

OK say i powerbrake my A4 94 Z and do a nice burnout...how come my car wont keep the power up, it tends to die down while smokin them up, and if i let off and get back it, it still is missing power. The car has ALWAYS done this, is it something to do with the computer? After a little while the car will regain the power. I havent tried it after the tune up, maybe itll fix it? Whats the deal?

It feels like something is pulling the engine power away from the vehicle....nothing happens though, is this normal?

Thanks!
Old Oct 14, 2004 | 05:31 AM
  #2  
slopokrodrigez's Avatar
Registered User
 
Joined: May 2003
Posts: 2,275
Re: PCM question

Do you still have ABS? If so, did you notice if the "LOW TRAC" light comes on when you're doing your little stunt? If it is, the ECM is pulling timing to correct the front wheels from slipping, since the ecm sees the back wheels turning but not the fronts. It may think you are slipping.

If it's not the above, sorry.
Old Oct 14, 2004 | 06:51 AM
  #3  
jonota's Avatar
Registered User
 
Joined: Jan 2003
Posts: 299
From: Honolulu, Hawaii
Re: PCM question

another possibility is your rear brakes are overheating, and making them stick a bit (rotor expands into pads) and once it starts to cool down a bit, they unbind. Doing a powerbrake has never been very nice to cars... if you can't spin em with power alone, why spin em? Also, does your coolant temp rise dramatically when you do this???

Jonota
Old Oct 14, 2004 | 09:35 AM
  #4  
Bad64chevelle's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 246
From: Bordentown NJ
Re: PCM question

Sorry i should have added that the low trac light does not come on...only time ive ever seen that come on is when my front wheels slid in the snow. I cant spin em on a launch.....i used to be able to with the old bald tires...but not with the new ones my temp doesnt rise on the camaro that much while spinning the tires, but the chevelle temp FLIES up, but thats a whole nother story of coolant problems... Can i have this disabled in the computer somehow when i get my tune? or is this just another one of those "just MY car problems" that i seem to have ALOT! Thanks guys Any other ideas?

Last edited by Bad64chevelle; Oct 14, 2004 at 03:43 PM.
Old Oct 14, 2004 | 04:19 PM
  #5  
jonota's Avatar
Registered User
 
Joined: Jan 2003
Posts: 299
From: Honolulu, Hawaii
Re: PCM question

there's nothing that I know of in your PCM that should have anything to do with it.... so i would say no, it can't be programmed out.

Jonota
Old Oct 14, 2004 | 04:31 PM
  #6  
Bad64chevelle's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 246
From: Bordentown NJ
Re: PCM question

Yeah well i just went for a ride and tried the burnout again...and it still pulls my power! The car feels sluggish lately even after the FULL tune up. im begining to wonder if it may be sensor related (o2's are changed) or something else electrical. The SOTP meter is way off from say the first day i bought the car but i guess some day ill figure it out. Any more feedback?

**Would me having my Low coolant sensor Unplugged effect anything? The light was on and i just disconnected it so the light went out...**

Last edited by Bad64chevelle; Oct 14, 2004 at 04:42 PM.
Old Oct 14, 2004 | 07:55 PM
  #7  
S8ER95Z's Avatar
Registered User
 
Joined: May 2001
Posts: 609
From: Quad Cities
Re: PCM question

IN short...NO it wont.

How is your Knock Retard? Sounds like maybe a transmission issue if you dont see anything on a scanner thats obvious.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
DirtyDaveW
Forced Induction
13
Dec 1, 2016 05:37 PM
94Form
LT1 Based Engine Tech
10
Feb 10, 2015 11:23 PM
Deadbolt24
LS1 Based Engine Tech
1
Jan 19, 2015 01:29 PM
Injuneer
LT1 Based Engine Tech
5
Dec 15, 2014 09:36 AM
dreamer1q
Midwest
4
Aug 20, 2002 11:19 AM




All times are GMT -5. The time now is 09:43 AM.