87 way too rich!!!

[loneranger6886]

1987 suburban 1500 4x4 TBI. Way too rich, dumping fuel into throttle body. Gradually getting worse. I have replace the O2 sensor, Map sensor, Coolant sensor, ECM, and investigating the EGR right now. Most of the replacements were from trouble codes or bad sensors in general. The strange part is that the injectors are both pumping out the same amount of gas. Way too much. When we disconnect the EGR it idles better, not much, but better. There is supposed to be 6 inches of vacuum there at idle but there is none. I cannot find any vacuum leaks. Not much left to replace, I am thinking its the Pressure Regulator but who knows. Any help would be much appreciated.

[Terry L]

check the egr solenoid

[idmetro]

Might also check the fuel return line to the gas tank; if it is blocked/kinked it might cause a high pressure situation forcing the injectors to dump excessive fuel into the engine instead of returning it to the tank.