I have posted on here before about this car and this problem. I have new information and new developments.
Here is the history; my 1987 Subaru GL died on me, while driving, and wouldn't start again. Since then It has started on occasion but not easily and runs rough for a bit before smoothing out. When it does run there is no telling how long it will run for or if it will start again when its shut off. About 3 weeks ago it started and died shortly after only to start again and run and drive for over an hour, until I shut it off. The next day it wouldn't start again. I started looking at it again today and I was able to get it started with the help of some starter fluid but it wouldn't keep running without me constantly pumping the gas. After keeping it running for a few minutes there was smoke coming up through the handbrake housing. After shutting it down I looked underneath and the exhaust was glowing red from the manifold back to about the rear axles.
What I have done in the past is changed out the ignition switch, checked the distributor, coil, MAF, injector and fuel pressure. All have checked out good. With todays events I checked the spark plugs and found that they have excessive carbon deposits. So that in combination with the red hot exhaust, and hard to start makes me think that atleast one of the problems is rich air fuel mixture. I think this is controlled by the airflow meter. I will be checking this tomorrow.
Anybody have any other suggestions?