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Big Red Fred

Kimberling City, MO

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Question Asked: 

Truck has no power and bogges down down when given throttle. I have changed the plugs, distributor cap and rotor. Still did not fix the problem. Replaced the throttle position sensor and thought I found the problem but still bogges down. I removed the throttle body and thoroughly cleaned it and the IAC. Still no change. Discconected the Map sensor and no change in starting. Was told to try to remove a oxygen sensor as this could be the problem. I removed one of the o2 sensor and no change. I would note that the truck starts right up and has a smooth idle. I then checked the fuel pressure. It read 52 PSI and dropped quickly. Checked it again and it read 35 PSI. Checked it again and the needle was bouncing rapidly so I am thinking ok a bad fuel pump. I would note that the old pump was engaging. So I replaced the fuel pump. Thought problem would be fixed. No. I still have the same problem. Any ideas. Thank you. PS I have not re-checked the fuel pressure as of yet.


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Question Asked: 

I have replaced the plugs, distributor cap, rotor. check the thtrottle body sensor and the volteage did not increase when the throttle was moved so I replaced the throttle body sensor. Checked it and the voltage increased and the trottle was increased. Thought I had the problem solved but after a test drive it still has loss of power. took off the throttle body and cleaned it as well as the IAC and also checked the map sensor to make sure it was not clogged. Truck still has a loss of power and the idle now is slightly higher. I would also note that the check engine light is not on. Any advise. Thank you


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