I have an 89 rx7 gtu, the check engine light turned on about 3 years ago but after I shut it off it was gone. It came back about a year ago and the car will go to limp mode exactly as the light came on. The codes I got were 20 and 27. Oil metering pump. I'm trying to get a new one or rebuild mine but I can't seem to find any or anyone that does that here in California. Can anyone help me out?