PCM Diagnostics & Tuning HP Tuners | Holley | Diablo
Sponsored by:
Sponsored by:

Car Stuck in Power Enrichment Mode

Thread Tools
 
Search this Thread
 
Old 01-09-2005, 12:39 AM
  #1  
11 Second Club
Thread Starter
iTrader: (16)
 
Tiger2o69's Avatar
 
Join Date: May 2004
Location: MS
Posts: 2,223
Likes: 0
Received 0 Likes on 0 Posts

Default Car Stuck in Power Enrichment Mode

Car felt sluggish tonight when I did a few races so I decided to log a little on the way home.

I started logging and notices that all my ltfts were 0's. Im like wow.... Well then I noticed that the 02's were hanging where they do at wot...I looked at the a/f ratio and it was running super rich all over the place...I went wot and got lots of knock and it was hitting 970 and 980's wot.....

Any Idea whats going on?
Old 01-09-2005, 12:43 AM
  #2  
11 Second Club
Thread Starter
iTrader: (16)
 
Tiger2o69's Avatar
 
Join Date: May 2004
Location: MS
Posts: 2,223
Likes: 0
Received 0 Likes on 0 Posts

Default

Oh yeah. Fuel trim is sticking at 22.....so basically the car things its in wot all the time.
Old 01-09-2005, 12:56 AM
  #3  
FormerVendor
iTrader: (1)
 
HumpinSS's Avatar
 
Join Date: Feb 2002
Location: Waldorf, MD
Posts: 3,059
Likes: 0
Received 0 Likes on 0 Posts
Default

Sounds like you are in open loop is there a ses light and if so what is the code the car is throwing
Old 01-09-2005, 03:33 AM
  #4  
TECH Addict
iTrader: (4)
 
Mike454SS's Avatar
 
Join Date: Oct 2004
Location: Manchester, CT
Posts: 2,139
Likes: 0
Received 4 Likes on 4 Posts

Default

Maybe your TPS is bad?
Old 01-09-2005, 09:00 AM
  #5  
TECH Addict
iTrader: (11)
 
Billiumss's Avatar
 
Join Date: Nov 2001
Location: Erie, PA
Posts: 2,975
Received 14 Likes on 10 Posts

Default

Check your MAF and/or your front O2's, they could be bad...

I saw this on a car that had a bad MAF, the SES light was on.

I also saw this on a 99TA that had a bad front O2.

Bill
Old 01-09-2005, 10:10 AM
  #6  
TECH Addict
iTrader: (10)
 
wait4me's Avatar
 
Join Date: Feb 2003
Location: warsaw, in
Posts: 2,961
Likes: 0
Received 1 Like on 1 Post

Default

yup sounds like the o2s to me too.. they have to report that they are fully heated or the car says in openloop cell 22 untill warmed up.. ?
Old 01-09-2005, 01:15 PM
  #7  
Moderator
iTrader: (11)
 
jimmyblue's Avatar
 
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes on 6 Posts

Default

PE requires you be above enable MAP and above enable
TPS to be active. However you can be open loop from
other things, such as cat overtemp (COT) or some other
system fault (O2s, maybe other emissions things).

Look at TPS reading to be sure it's not saying WOT,
pull codes and see if any unusual new ones have shown
up (the SES light may not illuminate until fault is present
for a couple of starts, etc.).
Old 01-09-2005, 08:20 PM
  #8  
11 Second Club
Thread Starter
iTrader: (16)
 
Tiger2o69's Avatar
 
Join Date: May 2004
Location: MS
Posts: 2,223
Likes: 0
Received 0 Likes on 0 Posts

Default

Well things are back to normal now. I have cot turned off. The car was warmed up and tps was working.

The only code i was throwing was the insufficent switching of 02's...Maybe that was it.
Old 01-09-2005, 08:43 PM
  #9  
TECH Addict
iTrader: (10)
 
wait4me's Avatar
 
Join Date: Feb 2003
Location: warsaw, in
Posts: 2,961
Likes: 0
Received 1 Like on 1 Post

Default

yup o2s.. see it often.
Old 01-10-2005, 04:32 PM
  #10  
11 Second Club
Thread Starter
iTrader: (16)
 
Tiger2o69's Avatar
 
Join Date: May 2004
Location: MS
Posts: 2,223
Likes: 0
Received 0 Likes on 0 Posts

Default

So I suppose they had a temporary moment or does mean they are going out?

btw....any of you vette guys have your rear 02's for sale?




All times are GMT -5. The time now is 03:44 PM.