got this ecu and dont know what it is. wont work code 21 vtec but still hits red line.
what ecu is this doesnt say anywhere.

http://s63.photobucket.com/albums/h145/sikcrx80/?

http://s63.photobucket.com/albums/h145/sikcrx80/?

sorry about second pic being so big. dont know how to make smaller

 

I think, THINK, it is a Converted P06. It looks like who ever had it before converted to P28 based.

Please as a warning to EVERYONE:

<u>BUY ONLY ECU'S WITH BOTH TAGS ON THEM!!!</u>

to many people converting P06, P05 to P28 and selling them off that way.

 

is there something wrong with computer done this way?
i converted from obd2 to obd1 and wont work in it.
anyone else?

 

301 on the MCU indicates this was a P06-A02.

it has the VTEC components installed though, depending on what's in the chip it should work.

make sure that the diode in the top left hand corner of the ECU (second pic) is in right. the bar on the board should fit with the stripe on the diode.

 

what happens if the diode if it is in backwards?
goes past 8000rpms but no vtec and sluggish

 

if the diode is in backwards it will pull down the VTEC output to the point of not opening the solinoid and you will not switch to the high RPM cam profiles.

 

I'm gonna guess whoever converted this non-vtec ecu to vtec didn't use a 5151 transistor...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by devnull &raquo;</TD></TR><TR><TD CLASS="quote">
to many people converting P06, P05 to P28 and selling them off that way. </TD></TR></TABLE>

Whats wrong with doing this???
If the ecu works and vtec kicks on like it should (if converted properly) there's absolutely no problem with a converted non-vtec ecu.

 

so do u think if the 5151 transistor was put in would it flash a vtec code.

 

if there is a 5050 in there now it will do exactly what you say it does.
if the diode is in backwards it will do this also.

double check the diode and the FET in the center top of the left side (connector side)
if it says 5050 start complaining to the guy you bought it from. If it says 5151 then that isn't the problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sikcrx80 &raquo;</TD></TR><TR><TD CLASS="quote">so do u think if the 5151 transistor was put in would it flash a vtec code. </TD></TR></TABLE>

if the 5151 was installed, then the problem could lie somewhere else. 5151 is the correct transistor. I would do what Relic suggests; get in contact with the person who you bought the ecu from...

but then again, maybe the program on teh eprom chip is funked up, or maybe your jumper harness is faulty....

Maybe try this ecu in a friends car to pinpoint the ecu as the main source of the problem..