transistor q29 has 10-12volts at heat sinc no start flodding

[boostedcivicsir]

i have an issue with the ecu seeing pressure from the map after cranking. i have no datalog as the car wont start this way, but cranking the map is going positive, the boost solenoid goes crazy, thinking it is seeing boost it needs to control. all pins have been gone over like 15 times to make sure they are right.

this problem has been intermittent untill now it is all the time.

the heat sinc at q29 has 12 volts at it when this problem is occuring. before when the issue was intermittent, when it wasnt posing itself, there was no voltage at the heat sinc. now that it is there all the time there is 12v at the sinc.

is the transistor shorted out?
when i installed the map, it may have had a bad joint that was shorting, but i have since been through all that and cant say that that is the issue.

here is the map.

[Hondata]

Ignore the boost solenoid - if you're seeing over 100 kPa when cranking, then the problem is the MAP sensor.

What pressure do you see with the key on engine off?

[boostedcivicsir]

Ignore the boost solenoid - if you're seeing over 100 kPa when cranking, then the problem is the MAP sensor.

What pressure do you see with the key on engine off?

i know to ignore the solenoid, i have gone in and disabled the boost control just for testing to save the solenoid.

i am spent and trying to remember from yesterday.

key on engine off and NOT CRANKED, i must stress that, because it reads 29" vac. wow...... i just had a brain fart. should be 0. DOH.

the problem kinda went away late yesterday but i dont think it is fixed. so i am going outside to look at the data list now.

cranking it goes to 0, and when the issue occurs, cranking it goes into pressure. sometimes up to 65 psi. and does not reset until key off.

the transistor related to the boost control?

other question, did the flow chart for the map according to the helms, they are looking for appx 3v from d17 to d21. is this only true with a stock map sensor? it is 1.3 with the 5 bar and 1.6+- with the 3 bar. at that point the helms says to replace the map sensor.

should it be 3v with either sensor? is there a chance my 5 bar and my 3 bar are both bad?



thanks for the help.

[boostedcivicsir]

goin back out and looking at the car i cant believe i didnt notice yesterday that at atmoshperic, there is 29" of vac. not cranking. not idling.

the setting for the map in is in the cal above it is set to "/psi
is that right?

cant start the car no fuel in it.

here is a screen shot:

[Hondata]

What sort of MAP sensor is it? Can you swap in another for testing?

[boostedcivicsir]

aem 5 bar.
i tried a motec 3 bar just for a sec, and i cant remember if it was reading 0"/ at k.o.e.o.

i have another 5 bar to swap it with. i just need to go get it.

[boostedcivicsir]

also, with or without the map being plugged in the issue is there.