The fuel lines around the filter; you will need an adapter.
Check the proportionating valve.
It is in the throttle body.
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on the block under the intake
The fuel pressure should be 45 psi .
check/replace spark plugs
The AC system can be recharged in a 1990 Chevy Corsica by connecting a refrigerant tank to the low pressure inlet. Refrigerant is then added until the correct pressure is reached.
9 to 19 PSI. / LBS. NO lower are higher are you will have problems.
9 to 13 LBS. It CAN'T be any higher are lower are you will have problems.
Whats next to check on my 1990 Chevy 7.0 for fuel not getting to carb. I have replaced fuel filter and 10 amp fuse?
IS it the pump itself? Did you check for a blocked fuel filter? are you getting any fuel pressure to the fuel rail?
Check under vehicle follow the fuel line from tank