Surge After Shifting
January 16th, 2021 | 1:45 AM
#1
Thread Starter
CF Beginner
Joined: Jan 2021
Posts: 8
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Surge After Shifting
Hello,
I have a '94 K1500 with a 4.3L and NV 3500 transmission and I've noticed a strange surge, or jerking, sensation after I shift to the next gear when driving. When it's cold and has just started to get on the road, it's fine. After everything has warmed up, I'll grab a gear and the truck starts to jerk around and sounds like it's losing it's fuel supply and trying to shut down on the highway. Once in a while it will surge while at a cruising speed too. I have recently replaced the fuel pump and the fuel filter, and the air filter looks decent. I was just hoping to pick your brain and see if you had any ideas that I could check out. Thanks for any help!
I have a '94 K1500 with a 4.3L and NV 3500 transmission and I've noticed a strange surge, or jerking, sensation after I shift to the next gear when driving. When it's cold and has just started to get on the road, it's fine. After everything has warmed up, I'll grab a gear and the truck starts to jerk around and sounds like it's losing it's fuel supply and trying to shut down on the highway. Once in a while it will surge while at a cruising speed too. I have recently replaced the fuel pump and the fuel filter, and the air filter looks decent. I was just hoping to pick your brain and see if you had any ideas that I could check out. Thanks for any help!
January 16th, 2021 | 4:46 AM
#2
CF Monarch
Joined: Oct 2017
Posts: 4,605
Likes: 263
From: USA
Hello,
I have a '94 K1500 with a 4.3L and NV 3500 transmission and I've noticed a strange surge, or jerking, sensation after I shift to the next gear when driving. When it's cold and has just started to get on the road, it's fine. After everything has warmed up, I'll grab a gear and the truck starts to jerk around and sounds like it's losing it's fuel supply and trying to shut down on the highway. Once in a while it will surge while at a cruising speed too. I have recently replaced the fuel pump and the fuel filter, and the air filter looks decent. I was just hoping to pick your brain and see if you had any ideas that I could check out. Thanks for any help!
I have a '94 K1500 with a 4.3L and NV 3500 transmission and I've noticed a strange surge, or jerking, sensation after I shift to the next gear when driving. When it's cold and has just started to get on the road, it's fine. After everything has warmed up, I'll grab a gear and the truck starts to jerk around and sounds like it's losing it's fuel supply and trying to shut down on the highway. Once in a while it will surge while at a cruising speed too. I have recently replaced the fuel pump and the fuel filter, and the air filter looks decent. I was just hoping to pick your brain and see if you had any ideas that I could check out. Thanks for any help!
January 16th, 2021 | 7:48 PM
#3
CF Active Member
Joined: Jun 2018
Posts: 200
Likes: 36
From: Utah, USA
@oilcanhenry How would that cause the surge? Would it be caused by a dead spot in the sensor, so every time he hits that spot it stumbles? I think it is safe to assume he has good fuel supply, but we should also consider the truck would have TBI, right?
January 17th, 2021 | 3:12 PM
#4
Thread Starter
CF Beginner
Joined: Jan 2021
Posts: 8
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Yes the truck has a TBI set up. Where it was happening when I let the clutch out I was wonder if it could possibly be the clutch or the pressure plate. I keep forgetting how many sensors are on these trucks.
January 18th, 2021 | 9:41 AM
#5
CF Monarch
Joined: Oct 2017
Posts: 4,605
Likes: 263
From: USA
@oilcanhenry How would that cause the surge? Would it be caused by a dead spot in the sensor, so every time he hits that spot it stumbles? I think it is safe to assume he has good fuel supply, but we should also consider the truck would have TBI, right?
January 18th, 2021 | 9:43 AM
#6
CF Monarch
Joined: Oct 2017
Posts: 4,605
Likes: 263
From: USA