Hi all,
I have searched the board for this and I have not found the answer...so maybe you guys can help.

What components (in a 90 GTU) are involved in the operation of the Metering Oil Pump. I have been trying to eliminate a recurring code and have not had much luck. I have replaced the ECU and MOP. It will run fine...then after it hits operating temp it will throw the code while I am at idle (the goes into limp home mode).

I can't ditch the MOP since it is the electric one, so I have to fix this bug. Maybe it's in the wiring, or a sensor, or some other component other than the ECU or MOP??

Thanks for any input.

Cardio

 

what code is it coming up with?

matt

 

good luck i burned 3 ecu before i was told i had to replace the omp first then the ecu .
where did you get the omp from??? the way i was told to check if omp was good was to open the ecu and look for burned marksin the system board


can you guaranty that the omp you got was good to begin with???

 

It has been coming up with a code 27 (i think, I am at work right now and can't check it). I can't gaurantee the MOP, I guess I can look on the ECU board, but where on the board should i look (i've never opened the ecu before so I don't know what to expect).

Thanks again.
Cardio

 

just open it up nothing but screws there is going to be 2 different boards on there look at both of the very carefull and look for burned spots usuailly its near a black block wich i thinck its call a ic by the way where is tx are you at??? im in houston

 

I'll check it next chance I get.,,,and with my schedule...that may be a while


I'm located in Conroe.

Cardio

 

im not to far from you i live around 290 and 1960
we cant meet up sometime maybe i can help you look at it

 

Free manual at http://www.iluvmyrx7.com

 

prmazdarx7....

When I get around to I just might take you up on that.

Cardio

 

hehe no problem
do yourself a favor do not ride your car like that or you wil kill the motor

 

She's Parked. Luckily I have a second set of wheels.

Cardio

 

good i burned one engine like that but now i know better. by the way my shocks and springs are comming in this thursday cant wait till saturday to install them

 

Thats cool. What type did you get? and how much?

Let me know how they perform.

Cardio

 

tokiko hp shocks and suspension technics springs 1 inch drop total was $545.00 thats with me installing them hehe

 

You may want to start of by going to the free manual link from a prior reply. Look under lubrication in section D, pages 16-18. I am not an expert but my son's 90 vert had the same problem. I guessed that there must be some time delay relay in the ecu or perhaps the temp sensor delays the ecu's action in cutting rpm's to 3000 when the OMP is malfunctioning. There are two codes you can get, 20 and 27. The actual metering pump is mechanically driven. The electrical portion that may be giving you fits is the stepping motor and position sensor. The stepping motor is used to open a slide gate valve to allow more or less oil to the injector tubes/rotors. The position sensor senses the position of the valve. On the pump I had, the sensor was bad. The manual shows you how to check each one of these circuits. If the sensor is out, code 20 comes up. If the stepping motor is bad, its 27. If you have to replace the omp with another used one, be careful not to "overclean it" with degreasers, etc. I screwed one up doing that.