For the last 6 months I have been trying to get this vehicle running i have tried everything and running out of ideas.... and money.
The vehicle is a 5 speed manual 1990 Subaru Loyale with an ej22 swapped into it out of a 5 speed manual 1992 Subaru Legacy.
4 out of 5 days of the week it drives normally but runs rich (I get about 16 mpg), sometimes it will surge idle/stall(also did this in the legacy), throttle wont responds unless pumped, will sometimes high idle like its cold even if it isn’t, Will have extreme hesitation/sputtering.
I have replaced;
Throttle position sensor
Coolant temp sensor
Spark plugs and wires-all spark plugs are dark black but dry. I just checked them today.
Cleaned idle air control valve
Had fuel injectors rebuilt
New timing belt and water pump
New intake manifold gaskets
Valve cover gaskets
Swapped out computer for a different one
Checked for vacuum leaks couldn’t find any
Had electrical expert/ Subaru mechanic check that all the electrical was functioning properly
Checked compression- all 4 cylinders were at 180 PSI- also checked today
Cleaned the MAF sensor
The exhaust sometimes is black sometimes is blue but is almost always white, even when warm.
The catalytic converter has been gutted out
Check engine light codes read 31 and 33 which is throttle position sensor and vehicle speed sensor.
When I put in the new throttle position sensor today it ran much worse than usual to the point of not being able to drive.
- Any help would be great