MSefi.com read only forum (Jan.15,2018)

both ms2 boards are now running great! jumpered past the bad pins under the 40 pin socket. and past 2 of the gold pins that broke after our many times pulling it out... carefull when doing this, obviously.. ha ha ha...

since then i did a 8 hour drive through very questionable weather. yes we took ...

well, i took the MS2 out of the car and into the house. put it ont he stim and then heated the circuit board with a heat gun.... sure enough, with just a little heat i had the problem again...

so tonight after lots of looking, we unsoldered the 40 pin chip socket and things were kinda bad ...

after much playing with it... i started to notice that cabin temperature seemed to effect the problem.... car cold inside, worked great. but if i let it idle long enough for it to warm up inside, then i see the error.

so i brought the MS inside and hooked it to the stimulator. and then ran it while ...

argh... gotta quit playing with this thing for a bit... but i cant!!!! ha ha ha!

thought maybe the issue was me burning new msq files while the car was running. so i went out for several short drives. after each run i would stall the car and look at the kPa level. allways 90kpa. as it should be ...

a friend built this one. i have built one myself in the past. but his ranger only ran for a month or so before it got put up on stands for a full redo.. so i cant say for sure it was a perfect MS2, but weve both run on it. this is the first we recollect seeing this issue. but the computer hasnt run ...

ms2 3.0board 2.889code

im having an issue with my MAP reading changing... ive sorted out pretty much every other issue. and reloaded the code a few times. even tried different code versions.. still this same issue.

when the engine is off my MAP allways reads 90kpa.. and this never changes... then ...

well, thank you trakkies....... i hated that relay board from square 1.. could'nt ever figure out how to wire it right, the grounds and all..... and for a while ive been wanting to do this. sooooo, i cut into my cable from the MS to the relay board, slaughtered all the grounds and wired them how ...

ill play with that some today then. ill rework my O2 sensor wires to the engine head, and ill send the coolant temp grounds there too. i wish i had a 2wire coolant sensor. but a am seeing the blips in TPS too, so i dont think my single wire sensor is the only problem...

keep ya posted.

just a little update... i had a spare alternator here, so i tried it. same irratic rpm cycling going on with it. as soon as i turn off the alternator it runs much better. sterio can still disturb the TPS. and when i rev it i also see the coolant bliping slightly....

my grounds are pretty awesome ...

i swear i had a membership here a long time ago... ha ha ha... back to newbie.

i havnt played with my civic for 5 years. but i recently put it back together.

1983 civic, EL1 motor, ported head, custom cam, venolia pistons, turbocharged, multiport efi, edis

ms2, 3.0 board, 2.88 code

my car is ...