Bookario11
Newbie
Howdy, I’ve got a 1995 K1500 TBI with the 5.7 and I’m stumped. I’ve got this strange problem where after it’s warmed up it’s seems to surge and bog down and seems to vibrate if I give it more than give or take 30 to 45 percent throttle, not too sure why. At low throttle and slow traffic it does fine and shifts normally until I open the throttle up. When it’s still cool it drives fine, has plenty of power and I can open up the throttle and it feels good. But once it gets anywhere near warmed up the previous symptoms stated occur. I’ve replaced:
- Fuel Pump (about a year and a half ago)
- Both Coolant Temp sensors (about a year and a half ago)
- Cap, Rotor, Spark Plugs AND Wires (about a year and a half ago)
- K&N cold air intake (a year ago)
- Throttle Position Sensor (a year ago)
- Thermostat (6 months ago)
- Fuel Filter (Last weekend)
- Catalytic Converter AND o2 sensor (this week)
- MAP sensor (today)
- BOTH Fuel injectors and rebuilt Fuel Pressure Regulator (Today)
The truck also has a Radiator from a 454 Big Block, and the top fan shroud from the 454 I pulled the rad from. I live in Yuma AZ and it gets hot as hell here so I thought maybe it’s overheating or something but the temp gauge sits right where it should be unless I’m sitting in bumper to bumper at idle and then it’ll get a little hot, but as soon as I start moving around it’s fine. This problem began occurring about two months ago when I drove from Northern Nevada to Yuma (about 700 miles), broke the trip up into two days and I didn’t start to notice it till the end of the first day, and by the time I was 100 miles outside of Yuma it started to really become a problem. My heads just starting to hurt from this and so is my wallet, I’ve probably sunk way too much money into this thing in the last 2 to 3 weeks than I ever have so some help pointing to the right direction would be fantastic.
P.S I’m not throwing any Engine codes although last week when I was driving from San Diego (or, atleast, trying to), when I was going up the big hills outside the city I had literally no uphill power under load and it threw a code 44 (lean fuel condition) briefly and then I threw in the towel and pulled over. Hasn’t thrown a code since.
- Fuel Pump (about a year and a half ago)
- Both Coolant Temp sensors (about a year and a half ago)
- Cap, Rotor, Spark Plugs AND Wires (about a year and a half ago)
- K&N cold air intake (a year ago)
- Throttle Position Sensor (a year ago)
- Thermostat (6 months ago)
- Fuel Filter (Last weekend)
- Catalytic Converter AND o2 sensor (this week)
- MAP sensor (today)
- BOTH Fuel injectors and rebuilt Fuel Pressure Regulator (Today)
The truck also has a Radiator from a 454 Big Block, and the top fan shroud from the 454 I pulled the rad from. I live in Yuma AZ and it gets hot as hell here so I thought maybe it’s overheating or something but the temp gauge sits right where it should be unless I’m sitting in bumper to bumper at idle and then it’ll get a little hot, but as soon as I start moving around it’s fine. This problem began occurring about two months ago when I drove from Northern Nevada to Yuma (about 700 miles), broke the trip up into two days and I didn’t start to notice it till the end of the first day, and by the time I was 100 miles outside of Yuma it started to really become a problem. My heads just starting to hurt from this and so is my wallet, I’ve probably sunk way too much money into this thing in the last 2 to 3 weeks than I ever have so some help pointing to the right direction would be fantastic.
P.S I’m not throwing any Engine codes although last week when I was driving from San Diego (or, atleast, trying to), when I was going up the big hills outside the city I had literally no uphill power under load and it threw a code 44 (lean fuel condition) briefly and then I threw in the towel and pulled over. Hasn’t thrown a code since.
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