Hondata

hello guys!

i have been building a b20vtec which i was thinking about using hondata s300 to tune with.
i did have a p30g which i soldered in my s300 in. and had a result of getting a solid cel.
i get to connect the s300 into the computer, and upload and download the maps without any problems, i am online with the s300 all the time. but the car wouldn't start.

couple of guys told me it most likely was a destroyed p30g ecu i was struggling with.
so i desoldered out the resistors, jumpers and the IC out of the p30g and put it in a p28 ecu which i had started the engine with successfully, the day before.

so i soldered in all of the stuff i need for the s300 into the p28 ecu, and still got a solid CEL
but now the engine cranks, but it wouldn't start.

have done all of this:
# Take the ECU circuit board out the ECU case.
# De-solder IC4, install and solder in the 20 pin 74373 latch.
# De-solder J1, install and solder the supplied jumper.
# De-solder R54, install and solder the supplied resistor. Note: Not all ECUs require this step.
# De-solder IC3.
# De-solder CN2.
# Insert the male pins (1 x 4 pin, 2 x 14 pin) into the s300, install into the ECU and solder the pins.
# Cut J12

but on the J12, i just desoldered the one side, so the jumper is just connected on one point. (it would do the same work as cutting, right?)

video:


thanks for all the help:)
im kinda struggling here.

edit:
This is a 1995 Honda Civic EJ2 with a fully built b20b block, and a b16a2 top.
map was: b18c5revhardturbosc61.skl and itb.skl
didn't have any cel codes with virgin p28, got it after chipping in the s300.

crucian wrote:http://www.hondata.com/forum/viewtopic.php?f=19&t=3772

good enough?
i don't know if there is too much to datalog about it?

You would be better off posting high quality and in focus pictures of the soldering that has been done to the ECU.

snerky wrote:hello guys!

i have been building a b20vtec which i was thinking about using hondata s300 to tune with.
i did have a p30g which i soldered in my s300 in. and had a result of getting a solid cel.
i get to connect the s300 into the computer, and upload and download the maps without any problems, i am online with the s300 all the time. but the car wouldn't start.

couple of guys told me it most likely was a destroyed p30g ecu i was struggling with.
so i desoldered out the resistors, jumpers and the IC out of the p30g and put it in a p28 ecu which i had started the engine with successfully, the day before.

so i soldered in all of the stuff i need for the s300 into the p28 ecu, and still got a solid CEL
but now the engine cranks, but it wouldn't start.

have done all of this:
# Take the ECU circuit board out the ECU case.
# De-solder IC4, install and solder in the 20 pin 74373 latch.
# De-solder J1, install and solder the supplied jumper.
# De-solder R54, install and solder the supplied resistor. Note: Not all ECUs require this step.
# De-solder IC3.
# De-solder CN2.
# Insert the male pins (1 x 4 pin, 2 x 14 pin) into the s300, install into the ECU and solder the pins.
# Cut J12

but on the J12, i just desoldered the one side, so the jumper is just connected on one point. (it would do the same work as cutting, right?)

thanks for all the help:)
im kinda struggling here.

edit:
This is a 1995 Honda Civic EJ2 with a fully built b20b block, and a b16a2 top.
map was: b18c5revhardturbosc61.skl and itb.skl
didn't have any cel codes with virgin p28, got it after chipping in the s300.

I would say, either you did not do something right when soldering, or something is wrong with the s300. Post some pics of the installed s300 and soldering job.