Author Topic: 4.3 swap CA BAR Ref Smog help  (Read 244 times)

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socal85sas

  • Offline Rock Crawl'n
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4.3 swap CA BAR Ref Smog help
« on: Aug 30, 2019, 03:04:42 PM »
My 4.3 swap has been in and running great for years, but I rolled the truck did a full rebuild and made the mistake of trying to make this thing legit instead of paying for under the table smogs anymore...
Big mistake. Anyone with input will be greatly appreciated.
Quick rundown.
85 pickup
engine is a 93 4.3 CPI vin"w"
Trans is w56
Stock GM eprom is flashed to not turn out codes for manual swap

The REF refuses to sign off on it because the 92-93 vin W CPI engine appears to never have been backed by a manual trans.
2 different ref locations looked at it.
One said he would sign off on it if the scanner he uses will accept the option of manual transmission, but when he does it the scanner doesn't read the computer properly. if you select automatic when using an s--10 or Blazer, if you use the astro van it wont prompt for manual/auto option but of course there was never a Manual trans Astro van.

There is a spreadsheet floating around the net that shows eprom catch codes that indicate it could possibly exist with the same base computer that i currently have.
I was able to track down one of these but it appears it still looks like an auto program.  (BMUR)
when I install in in my current ecu it throws auto trans codes as an astro, and run as an s-10 manual it shows communication error. Same as my current one.
I have not been able to find any other of the 7 eprom's from this list anywhere, and after the one I have not working am unsure if the others will work or satisfy Ref's requirements.
If I cant get this thing figured out, I'm either going to have to swap to a newer truck/engine setup, or install an auto (going to shorten my trans length by about 1/2" and mess up driveshafts and trans cross-member dimensions)

Prog ID   BCC   Year   Release Date   Eprom   ECM   Prom ID   Scan ID   Platform   Engine   Disp.   Trans   Trans Type
BMUR   1993   34498   16210986   16168625   987   975   S1   L35   4.3   MAN   
BMUS   1993   34498   16210989   16168625   990   985   S1   L35   4.3   MAN   
BMXP   1993   34498   16211362   16168625   1363   1365   S1   L35   4.3   MAN   
BUZD   1993   35277   16239323   16168625   9323   9301   L1   L35   4.3   MAN   
BUZF   1993   35277   16239338   16168625   9238   9311   M1   L35   4.3   MAN   
BUZH   1993   35277   16239347   16168625   9347   9321   L1   L35   4.3   MAN   
BUZJ    1993   35277   16239362   16168625   9362   9331   M1   L35   4.3   MAN   
BUZK   1993   35277   16239376   16168625   9376   9341   S1   L35   4.3   MAN

current ecu and prom setup is:
BBNX   1993   33717   16179746   16168625   9747   9601   S1   L35   4.3   AUTO
my garage...
02 Ford F-150 Lightning---1/8 et 7.28 @98mph
85 Toyota pickup 4.3 chevy swap--resurrection
86 Honda TRX 250r
89 Yamaha Banshee
01 KTM 520exc dual sport/supermoto
02 Buell XB9s
02 Ford F250 diesel 4WD

 
 
 
 
 

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