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View Full Version : B16A Swap In 91 SI Tach Problem


Uptown401
03-25-2008, 02:34 PM
Hey I-A i like to know what might be the problem with my tach. When car is fully warmed up, the tach is reading 1000 rpm on idle, and my vtec is popping at 4200 rpm and its redlining at 7800 rpm. Im runing a obd0 pr3 ecu, i was told vtec engages at 5200 and redlines 8200 on the stock pr3......which is not doing so, so let me get some ideas of what might be the problem thanks.
bigdare23
03-25-2008, 02:36 PM
is your ecu chipped?!?
Uptown401
03-25-2008, 02:37 PM
is your ecu chipped?!?

nope its stock.........!
bigdare23
03-25-2008, 02:41 PM
I know with obd0 ecus vtec kicked in early, mine was kicking in around 4800-5000. So you could be ok.
Uptown401
03-25-2008, 02:55 PM
I know with obd0 ecus vtec kicked in early, mine was kicking in around 4800-5000. So you could be ok.

and where were u redlining..im redlining at 7800 rpm
bigdare23
03-25-2008, 03:00 PM
and where were u redlining..im redlining at 7800 rpm

8200 but thats with PW0
Uptown401
03-25-2008, 03:04 PM
my buddies, crx with a b16 swap running obd0 pr3, his car idles below 1000 rpm, and his vtec engages at 5200rpm and redlines at 8200 rpm which he only takes it up to 8 gran............i tried his ecu same situations as mines.
southside
03-25-2008, 04:05 PM
and where were u redlining..im redlining at 7800 rpmI thought thats where the b16 redlines at and the gsr redlines at 8200rpm not b16
JDMJAYDC2
03-25-2008, 04:13 PM
ive got teh same ecu and i redline at 8200 as well you might have a failing ecu on your hand or one that may have had some chipping done to it without your knowledge. Unscrew the cover off it and smell it if it smells burned or a burning smell comes up from it your ecu is going out
southside
03-25-2008, 04:13 PM
my buddies, crx with a b16 swap running obd0 pr3, his car idles below 1000 rpm, and his vtec engages at 5200rpm and redlines at 8200 rpm which he only takes it up to 8 gran............i tried his ecu same situations as mines.hmmmmmm:thinking: if you used his ecu and it did the same thing thats weird
Uptown401
03-25-2008, 09:44 PM
shiits weird man, but i guess ill live with it.......for get the b16...to weak for stock too me, i needa hop on a gsr.......$1200 for my whole swap