Flashing check engine light

[volcomskater773]

i have a 93 hatch with a dohc swapped into it. we recently replaced the o2 sensor with no problems. checked the ecu and it give me the ok code (55). every now and then the check engine light flashes then goes away. but still code 55. anyone know anything?

[GO240]

did you buy an exact replacement or just a bosch universal?

[volcomskater773]

its a replacement.

[volcomskater773]

bump

[i240sx]

thanks 4 the banner site...

[volcomskater773]

bump. for an answer?

[-RJ-]

my old car did that a few times, i could never find out why but it never caused any problems

[volcomskater773]

bump cause its still going on

[240RB1]

i would also like to know because the vert does the same thing

[volcomskater773]

i am fairly certain it is showing injector pulse BUT i dont want it there

[s13mike91]

i now have the same problem my friend has a 89 240 hatch with a dual cam swapped in it. i have a 91 240sx and my ecu kept blowing my #2 injector out. so i went to his house and he let me used his ecu and when i put it in it shows a check engine light sometimes while driving it. so come to find out when the motor was swapped in my friends car the ecu was never changed out so i'm pretty sure its the single cam ecu causing the check engine light.

[volcomskater773]

it cant be that tho cause i pulled the ecu from the dual cam car myself. this is getting crazy lol.

[s13mike91]

it could be an ecu problem.

[volcomskater773]

perhaps i do know when someone even bumps it while driving it spits like crazy. almost as the car were... alive lol.

[s13mike91]

yeah i was having a bad night that night. and i was turning on a street to go to another friends house i saw the check engine light it made me mad so i kicked it one good time and felt a little more power than normal.

[volcomskater773]

so mike you dont know anyone with a de for grabs do you? and no idea on the ecu i know the kid who had the car before me duct taped the wires together. gonna tackle with solder this weekend.

[wings_s13]

well it washaapping in my s13 and it ended up being the egr val, got that fixed and it was fine so it could be that. it never gave me probs tho just bugged me. hope it helps

wings

[s13mike91]

okay so the ecu in my car is for a 91 5spd. i was surprised. my ECU number A11-B44-G70 whats your ecu number i look for exactly your ecu goes too.

[volcomskater773]

well it washaapping in my s13 and it ended up being the egr val, got that fixed and it was fine so it could be that. it never gave me probs tho just bugged me. hope it helps

wings

reviving the old post to clear up the problem. i figured it out and wings is right. if you fiddle with the egr (or take it out completely )then it fires up the flashing light no performance loss tho just annoying. if you look at the 180sx cluster its not a check engine light its a muffler lol. hope this helps anyone who has this dilemma.