03-07-2018, 01:22 PM
I have a 1989 Suzuki sidekick that I recently purchased. I brought it home and noticed it wasn't running right so I started researching and following much of what I found on kickfix.com
At this point I have repaired a damaged crank key and replaced the water pump, timing belt, cap, plugs, wires, o2 sensor, water temp sensor, thermostat with a 180 degree, new radiator and replaced the auto trams fluid and oil. Timed with light to 8 degrees at 800 rpm
Test I have performed are:
Compression 160 each cylinder
Fuel 40 psi and stayed at 40 for 5 min when car turned off
Checked for vacuum leaks and couldn't find any
Ecm gives me code 12
Cleaned egr and pcv
Checked isc and it appears to function properly
No crack in exhaust manifold
Car runs pretty good, but it misses when it is cold. Rises to 2000 rpm then drops to 1500 and slowly to 800. The missing stops when fully warmed. It will miss again if I turn on lights or any other electrical circuit that makes Ecm think motor is under load. Mpg is around 20 which makes me think it is running rich.
Your ideas of where to look next will be appreciated. Ecm, isc, tb air leak, cat?
At this point I have repaired a damaged crank key and replaced the water pump, timing belt, cap, plugs, wires, o2 sensor, water temp sensor, thermostat with a 180 degree, new radiator and replaced the auto trams fluid and oil. Timed with light to 8 degrees at 800 rpm
Test I have performed are:
Compression 160 each cylinder
Fuel 40 psi and stayed at 40 for 5 min when car turned off
Checked for vacuum leaks and couldn't find any
Ecm gives me code 12
Cleaned egr and pcv
Checked isc and it appears to function properly
No crack in exhaust manifold
Car runs pretty good, but it misses when it is cold. Rises to 2000 rpm then drops to 1500 and slowly to 800. The missing stops when fully warmed. It will miss again if I turn on lights or any other electrical circuit that makes Ecm think motor is under load. Mpg is around 20 which makes me think it is running rich.
Your ideas of where to look next will be appreciated. Ecm, isc, tb air leak, cat?