Engine Management eCtune , Crome , AFC , FMU , Zdyne , Hondata , EMS , TE , Uberdata Anything to control your fuel, spark needs!

Whats the difference in 27 and 29c256?

Old 05-25-2004, 08:43 PM
  #1  
1.5 BAR
Thread Starter
 
Join Date: Jun 2003
Posts: 911
Default Whats the difference in 27 and 29c256?

I was messing around in TE and made a single map rom to see if I was running too rich in boost. Well, I burned it onto a 27c256 and it gave me a solid cel. So I figured it was just a bad burn. So I put the normal 29c256 back in and it runs. So I then find another 27c256 with some old code on it that was only single map and put that in. Solid cel. So I try every old 27c256 and none will work. but the 29c256 runs perfect. WTF?
I thought to the ecu that 27 and 29's were the same?
Carnesd is offline  
Old 05-25-2004, 11:44 PM
  #2  
1.5 BAR
 
Join Date: Jul 2003
Posts: 890
Default Re:Whats the difference in 27 and 29c256?

it depends... what kind of programmer?
the 27 series chips are UV erasable, so you would have to make sure they are fully erased.
evosol is offline  
Old 05-25-2004, 11:58 PM
  #3  
3.0 BAR
 
Join Date: Apr 2003
Posts: 2,260
Default Re:Whats the difference in 27 and 29c256?

29C256s are rewriteable. Just "reburn" the program over the previous one.
TurboEF9 is offline  
Old 05-26-2004, 12:50 AM
  #4  
1.5 BAR
Thread Starter
 
Join Date: Jun 2003
Posts: 911
Default Re:Whats the difference in 27 and 29c256?

I didn't really clarify my question. What is the difference according to the ecu? I thought that they were both the same.

Cause when I put in any 27c256 I get an engine light, but the 29c256 works perfectly.

The 27's I'm using are (the one I burned today) and some old 1.29 tunes from te. They used to work.

Did I fry something in my ecu?
Carnesd is offline  
Old 05-27-2004, 05:49 AM
  #5  
0.0 BAR
 
Join Date: Mar 2004
Posts: 0
Default Re:Whats the difference in 27 and 29c256?

Maybe the data is corrupt from not being fully erased?
SpankedYA! is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
HMT-Admin
General Discussion
70
10-06-2007 01:24 PM
ifly87
Engine Management
8
05-01-2006 09:05 PM
biggmike
Engine Management
8
02-17-2004 11:39 AM
Turbo90Accord4DR
General Discussion
4
06-25-2003 03:43 PM
luderone
General Discussion
1
02-25-2003 07:47 PM


Thread Tools
Search this Thread
Quick Reply: Whats the difference in 27 and 29c256?


Contact Us - Sitemap - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.