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Bob
Bob, Auto Service Technician
Category: Car
Satisfied Customers: 4087
Experience:  40 year GM Tech. +30 Certified. ASE Master Tech.(expired, retired) Medium Duty, Heavy Line, Retired
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95 Chevrolet Silverado 1500 5.0 v8 engine fuel injected 2 ...

Customer Question

95 Chevrolet Silverado 1500 5.0 v8 engine fuel injected 2 injectors. just got it the other day. the tuck has been fluttering trying to take off after you stick it in drive or reverse but worse when it is in drive and you hit the gas from zero speeds like the engine loses power and wants to die the rpm drop wants you get the truck to go it goes away but does not stay running when you try to start it unless you pump the gas a lot then once started it idles ok just dies or wants to when you stick it into drive. The guy said he replaced all the wires and spark plugs and pvc and the rotor and stibuter cap trying to fix the problem. We stuck fuel injector cleaner it the tank of gas and then it really started acting out and then the check engine light cam on so we had that checked out showered it was a oxygen sensor and idle speed adjustment but do not know if it is the problem. we did drive it highway for bit and then the truck worked great for a day then acted up once truck set for day.
Submitted: 9 years ago.
Category: Car
Expert:  Bob replied 9 years ago.
Hello, the first two things that come to mind for me on your truck are, possible fuel pump problem or possible plugged exhaust system. To test the fuel pressure, you can rent a pressure gage from most auto parts stores. If the fuel pump pressure is low, that sure could be the problem, also be sure to check the filter if you have not done so. The pressure from your pump with a TBI system needs to be in the range of 9 to 13 psi. If it is below 9, you will need to replace the pump. Be sure if you go to all the trouble of removing the tank to replace the pump, that you also replace the wiring harness connector on top of the tank at the same time, as well as the pick up tube filter on the bottom of the pump. GM has had a lot of problems with pin tension on the connectors on top of the tank cause premature failure of even new pumps. To check the exhaust system for restrictions, you can either drop the exhaust at the "Y" pipes where they bolt to the exhaust manifolds or you can try removing an 02 sensor from in front of the catalytic converter. Then just lay a shop towel over the hole and rev the motor. If the towel blows off, you have to much back pressure, possible plugged converter, etc. Spec's on the back pressure is only about 2 psi. Let me know how the tests go and we will pick it up from there. Thanks