Plugged catalytic converter?
(1) Spark plugs need replacing. (2) Spark plug wires need replacing. (3) Distributor cap needs replacing. (4) Injectors are dirty and need cleaning or replacing (5) Fuel filter needs replacing. (6) Fuel pump needs to be checked.
fuel filter? fuel lines? what all have you checked.
By replacing a number for the variable.
Why does a person have his blood pressure checked on a regular basis?
A basic tune-up would involve replacing the spark plugs and possibly the plug wires. The fuel filter may be replaced and all fluid levels checked. Before electronic ignition systems it also meant to replace the points, rotor, condenser, and inspecting the distributor cap.A basic tune-up would involve replacing the spark plugs and possibly the plug wires. The fuel filter may be replaced and all fluid levels checked. Before electronic ignition systems it also meant to replace the points, rotor, condenser, and inspecting the distributor cap.
Have the fuel pressure checked should be about 40 I think but a GM dealership could tell you for sure also there should be a fuel pressure regulator
The pressure is checked with a gauge, the electronics are checked with an appropriate scan tool and a volt/ohm meter.The pressure is checked with a gauge, the electronics are checked with an appropriate scan tool and a volt/ohm meter.
If it starts hot, check the mixture control
A basic tune-up would involve replacing the spark plugs and possibly the plug wires. The fuel filter may be replaced and all fluid levels checked. Before electronic ignition systems it also meant to replace the points, rotor, condenser, and inspecting the distributor cap.A basic tune-up would involve replacing the spark plugs and possibly the plug wires. The fuel filter may be replaced and all fluid levels checked. Before electronic ignition systems it also meant to replace the points, rotor, condenser, and inspecting the distributor cap.
Check to see if there is a internal advance mechanism in your distributor. On older GM models bushings would wear causing it to stick and causing a surge or bucking as the advance within the distributor would release. Your computer regulates the advance, however, have the distributor checked.
Remember that the number one problem with these vehicles is the fuel pump. Have you checked for fuel pressure?
Just fixed this problem on a 1990 4.3. The pickup coil inside the distributor was bad. No signal was sent to computer to fire injectors. Make sure distributor is grounded well and if there is corrosion visible inside distributor save time and frustration by just replacing the distributor. I found several new ones on eBay for under $100. Had spark enough to run on starting fluid or if I poured gas in the throttle body but the injectors had no signal if checked with NOID light.