Question about 1999 Chevrolet Suburban
I have a 96 Suburban 2500 w 454. Check engine light came on while towing camper. Truck seemed to have no power and it maxed out at 50 mph. Computer check said two oxygen sensors bad. Before I changed both we took a 1500 mile trip without the trailer and had no issues. We came home and changed both sensors and then the truck seems to run rough and lack power. I have not put the trailer on it for fear of damaging something. Took it to shop and they said the fuel pump is only putting out 20psi when when reved up, and it should be more like 50psi. I took the truck home without changing pump. My question is do fuel pumps fail this way? I thought they just quit. I have replaced the pump before and actually have the oem in my tool box. (turned out the pump wasnt bad, but a bad wire) I don't want to go through that again. Could it be something else?
Try checking the fuel filter and then the pressure regulator on the rail. If the pressure regulator is bad it will not let the pump push enough pressure. And if the filter is clogged then it will also not let the engine get enought pressure. I have seen pumps starter going out by losing pressure. I have also seen aftermarket pumps quit after about a week unles you did not change the whole assembly.
Posted on Sep 27, 2009
Testimonial: "Thanks! I was unaware of the regulator. We did check the filter. Great info!"
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Posted on Jan 02, 2017
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