Join Date: Jun 2008
roadxing is offline
Re: 1991 sonoma with a 1990 s10 4.3 motor... getting to much gas, flooding... Wont St
-timing has got to be close enough... i say this because i managed to drive it today.
I ended up unplugging the 'Vehical Speed Sensor'. It may have just be coincidental, but soon after we figured out to start it you have the injectors plugged in, turn it over so it half way floods. Then unplug the injectors turn it over until it start to burn that gas. Then plug in one injector, keep it running for a second, then plug in the other and it will run and drive. Actually it runs pretty well. Still not right, but its getting there.
So im really confused now. Its not like it seemed like it was getting to much gas while it was running either. Not sputtering of bogging.
And it doesnt matter is its cold or hot. I ran it 5 miles probably as well as let it idle for a while, shut it off and had to repeat the same ol' circus act to start it again.
-MAP sensor vacuum looks ok. I even put anther MAP sensor on it, same problem.
-Also i messed up the throttle body i had on it, so i had to go get another one, so i'd say its probably not the fuel pressure regulator unless it was messed up in this "new" one too.
oh yeah, whats a good/acceptable oil pressure at idle for a 4.3L??