I finally got my car started via the ATF method. car starts on the first time every time now! not bad for my 90 vert with 42k original miles hehe...but one thing still remains...the poor car goes into limp mode.
once the car is warmed up...or i guess reaches a certain temperature, the check engine light comes on and the car goes into limp mode. i turned the car off and did the grounding of the wire in front near battery so i could read the error codes...they went like this:

flash(about 1 complete second) then sort of pause, then
flash(really quick one) then
flash(7 times in a row)
*then the whole sequence repeats

-does anyone know what this damn code is? or has anyone ever experienced it? people told me omp, but i have a good omp, also ecu is in great condition...i am running out of options. i hope someone knows the solution to this one, and can offer me some support.

Fred

 

my brother says that my code is actually a "05" because you dont count the first and last something something...is he right? if so the problem would be the knock sensor. would that cause my car to have the limp mode symptom? can someone shed some light on reading the code or help me out?

Fred

 

That sounds like code 27, which is the metering oil pump. Do not drive the car until you sort the problem out. Hopefully someone who's experienced this code can help, or you can download the Lubrication System chapter of the 89 FSM from www.fc3s.org for diagnosis info.

 

i havent driven the car yet...i want to resolve the problem...i searched and read there is no knock sensor for the N/A? soo i guess its not the knock sensor....and back to the OMP. i tried changing the ECU and still got the same error, i tried changing the OMP and still got the same error...dang i put everything stock back on, sooo everything is original from when the error first occurred. help me someone!

Fred

 

Don't underestimate your O2 Sensor not functioning to full capacity due to the ATF Trick. Sure enough It's coated with this fluid, depending how much you put. If you are experiencing bad milege than before, you may want to replace the sensor for safe measure.

 

i dont drive the car much...its a weekend sunny day driver. but i need to resolve the ECU error codes before i can do anything further. any suggestions based on what i have written? notice i tried replacing the ecu and also the omp. now what??

Fred

 

oil metering pump for sure! 100.00, i have one let me know if you want it...

 

how can it be the omp when i swapped it out and i still got the same error? how can it be the ecu when i also swapped it out and got the same error?
also, the check engine light comes on when the car is at a certain temperature...when its warmed up. any ideas? also, if anyone has a "working and in good condition electric omp" i can only afford $75.00 shipped. let me know if you have it. i also have a crapload of TII parts in really good condition i can swap. someone help me...........

Fred

 

Did you swap them out with new ones? I swapped a few used parts out... tested fine, until they were installed on the car. PIA if you ask me.

fikshun

 

what is PIA? and no i didnt swap them with "NEW", i swapped them with good working replacements/backup parts. thats why i was freaking out when i still got the error codes. someon has to know what to do.

Fred

 

PIA = Pain In the ****!

Fikshun

 

dang 112 lookers and i still have no progress...no forward movement torwards solving my problem. *sigh* hope someone comes along with the miracle answer...

Fred

 

well that doesn't look like 27... it should be one long, one long, 7 short. the one short in the middle doesn't make sense... however the MOP is the only one that will put it into limp mode. if you changed the MOP and the ECU. time to start checking the wires.

 

Nah, that sounds like code 17, which suggest 02 sensor voltage output is not up to spec.

 

sooo....do i need to replace the o2 sensor? anyone have one? any other opinions?

 

try replacing the o2 sensor then come back with more questions....most likely its that, if you've tried everything else.