Questionable Prom on 86
Thread Starter
Intermediate
Joined: Jan 2009
Posts: 46
Likes: 0
From: Fredericksburg Virginia
Questionable Prom on 86
Hey scan and tune guys, My BCC on my Prom is BUC9555
Everything I can find says I should be running with a BUC1724, can't find out anything on BUC9555.
86, iron heads, 2.59 axle
Is the 9555 correct for my ride? Getting false code 33 for years along with all the issues that Chevy put out in TSB 86-162. Previous owner had removed the SES light bulb and I've been struggling for years with this.
Thanks
Everything I can find says I should be running with a BUC1724, can't find out anything on BUC9555.
86, iron heads, 2.59 axle
Is the 9555 correct for my ride? Getting false code 33 for years along with all the issues that Chevy put out in TSB 86-162. Previous owner had removed the SES light bulb and I've been struggling for years with this.
Thanks
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
Are you sure its not BUC9355?
BCC used in 1986. (Scroll down for more info)BCC= BUC 1724 Scan id= 7942 Part number= 01227942
Release date= 07/28/86 Engine size= 5.7 Trans Type= Auto trans
ECM/PCM: ECM #01227165
Used in cars:
Chevy
Possibly used in:
CORVETTE
Options:
With GM1 AXLE, REAR, 2.59 RATIO
With KB2 HEADS, ENGINE CYLINDER (CAST IRON)
With L98 5.7L GAS 8 CYL MFI
With MD8 AUTO 4 SPD THM 700 R4
With NA5 FEDERAL REQUIREMENTS
**************************************** ***************************
BCC used in 1986. (Scroll down for more info)BCC= BUC 9355 Scan id= 9721 Part number= 16059352
Release date= 08/01/85 Engine size= 5.7 Trans Type= Auto trans
ECM/PCM: ECM #01227165
Used in cars:
Chevy
Possibly used in:
CORVETTE
Options:
With GM1 AXLE, REAR, 2.59 RATIO
With KB2 HEADS, ENGINE CYLINDER (CAST IRON)
With L98 5.7L GAS 8 CYL MFI
With MD8 AUTO 4 SPD THM 700 R4
With NA5 FEDERAL REQUIREMENTS
BCC used in 1986. (Scroll down for more info)BCC= BUC 1724 Scan id= 7942 Part number= 01227942
Release date= 07/28/86 Engine size= 5.7 Trans Type= Auto trans
ECM/PCM: ECM #01227165
Used in cars:
Chevy
Possibly used in:
CORVETTE
Options:
With GM1 AXLE, REAR, 2.59 RATIO
With KB2 HEADS, ENGINE CYLINDER (CAST IRON)
With L98 5.7L GAS 8 CYL MFI
With MD8 AUTO 4 SPD THM 700 R4
With NA5 FEDERAL REQUIREMENTS
**************************************** ***************************
BCC used in 1986. (Scroll down for more info)BCC= BUC 9355 Scan id= 9721 Part number= 16059352
Release date= 08/01/85 Engine size= 5.7 Trans Type= Auto trans
ECM/PCM: ECM #01227165
Used in cars:
Chevy
Possibly used in:
CORVETTE
Options:
With GM1 AXLE, REAR, 2.59 RATIO
With KB2 HEADS, ENGINE CYLINDER (CAST IRON)
With L98 5.7L GAS 8 CYL MFI
With MD8 AUTO 4 SPD THM 700 R4
With NA5 FEDERAL REQUIREMENTS
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
To buy one?
Rocking horse sh*t
Only way to get a different or later tune is a custom tune on a eprom
Popular mod is to run the '89 ARAP tune ( last of the MAF TPI tunes ) that does away with the cold start injectors
Rocking horse sh*t
Only way to get a different or later tune is a custom tune on a eprom
Popular mod is to run the '89 ARAP tune ( last of the MAF TPI tunes ) that does away with the cold start injectors
Thread Starter
Intermediate
Joined: Jan 2009
Posts: 46
Likes: 0
From: Fredericksburg Virginia
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Any of the many online tuners like Pcmforless
http://www.pcmforless.com/index.php?...d=91&Itemid=29
would be able to do one for you, would just select '89 ARAP on the order sheet instead of 86.
However when getting a custom tune most get other tune mods done at the same time ( no extra cost )
Change fan operating temps , delete EGR , delete VATS , etc
Note;
if you get the later tune you will have to unplug the cold start switch at front of intake ( the brass hex head unit on left ) so the original CSI system doesn't operate
Can just leave everything in place to fill the holes or there are TPI CSI "delete" kits with plugs if you want to remove the system completely
http://www.pcmforless.com/index.php?...d=91&Itemid=29
would be able to do one for you, would just select '89 ARAP on the order sheet instead of 86.
However when getting a custom tune most get other tune mods done at the same time ( no extra cost )
Change fan operating temps , delete EGR , delete VATS , etc
Note;
if you get the later tune you will have to unplug the cold start switch at front of intake ( the brass hex head unit on left ) so the original CSI system doesn't operate
Can just leave everything in place to fill the holes or there are TPI CSI "delete" kits with plugs if you want to remove the system completely
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
One of these may work. Do your homework before you buy.
http://www.ebay.com/itm/NOS-GM-1986-...99dfb1&vxp=mtr
http://www.ebay.com/itm/1986-350-TPI...99e86a&vxp=mtr
http://www.ebay.com/itm/86-Corvette-...0f2aac&vxp=mtr
http://www.ebay.com/itm/NOS-GM-1986-...99dfb1&vxp=mtr
http://www.ebay.com/itm/1986-350-TPI...99e86a&vxp=mtr
http://www.ebay.com/itm/86-Corvette-...0f2aac&vxp=mtr
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The later PROMs were made for aluminum heads. Probably won't make a lot of difference, but I've heard that the more aggressive spark curve works because the aluminum heads dissipate the heat faster than the cast iron heads.
I'm not sure how much this matters. GM was VERY conservative with their tunes to make sure you don't get into trouble.
I'm not sure how much this matters. GM was VERY conservative with their tunes to make sure you don't get into trouble.
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