steven0701
New member
"Having read the previous post
"Having read the previous posts regarding fuel issues with the 5.7 Gxi, I have decided I have a unique problem and need some advice. My engine is the "A" model from 2002 with less than 250 hours and is in a Cobalt 227. In the past 2 years, I have replaced the fuel pumps 4 times. These babies run from $700 - $1000 installed. All of the issues have been addressed, such as the anti-siphon valve, fuel filters, water separator, etc. to no avail. Symptoms are: rough idle and when gas is applied, the engine stumbles and even backfires, on occassion. EVERYTHING has been replaced, from the throttle body, injectors, water pump, distributor cap, wires, etc. Anything that could be bolted to the engine has been replaced except the ECM and the Volvo-Penta mechanics have all checked it and there are no trouble codes. Voltages to the pumps have been checked, as well, and are OK. There has been some small amounts of water in the fuel, but normal for where I am in Mexico, and attributed to condensation.
Has anyone had major fuel pump problems with this engine or is it just me? Needless to say, its driving me crazy, not to mention the cost."
"Having read the previous posts regarding fuel issues with the 5.7 Gxi, I have decided I have a unique problem and need some advice. My engine is the "A" model from 2002 with less than 250 hours and is in a Cobalt 227. In the past 2 years, I have replaced the fuel pumps 4 times. These babies run from $700 - $1000 installed. All of the issues have been addressed, such as the anti-siphon valve, fuel filters, water separator, etc. to no avail. Symptoms are: rough idle and when gas is applied, the engine stumbles and even backfires, on occassion. EVERYTHING has been replaced, from the throttle body, injectors, water pump, distributor cap, wires, etc. Anything that could be bolted to the engine has been replaced except the ECM and the Volvo-Penta mechanics have all checked it and there are no trouble codes. Voltages to the pumps have been checked, as well, and are OK. There has been some small amounts of water in the fuel, but normal for where I am in Mexico, and attributed to condensation.
Has anyone had major fuel pump problems with this engine or is it just me? Needless to say, its driving me crazy, not to mention the cost."