I have a 1994 K3500 with the 6.5L, i just put in a new turbo and high flow pickup pump, best power taking off I've ever had with this truck BUT when I let off the pedal it starts bucking and sometimes dies on me going down the road like it isn't getting fuel, it's been a great truck for me for the past 20 years and I'd kinda like to keep it, (only has 154,000 miles on it) any help/ideas would be greatly appreciated
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6.5L bucking when I let off the pedal
- Thread starter Hozer
- Start date
JMJNet
Recruit
Do a fuel pressure check? Hooked up a fuel pressure gauge and see how it behaves when it bucks?
Will L.
Well-Known Member
Welcome.
That and clear line on ip return to watch for air
That and clear line on ip return to watch for air
JayTheCPA
Well-Known Member
My vote is PMD.
Mine did the bucking part, but not the stalling. Replaced the PCM and things went back to normal.
Mine did the bucking part, but not the stalling. Replaced the PCM and things went back to normal.
sorry i don't know what the "ip" is
already replaced PMD and mounted it on wheel well,
injector pump?
Will L.
Well-Known Member
Yes ip is injector pump.
Get the pmd out of the engine bay. The engine heat cooks them. Most people move them to the back of the front bumper if a pickup, or on-top the battery tray if hummer, outside the housing if generator.
Get the pmd out of the engine bay. The engine heat cooks them. Most people move them to the back of the front bumper if a pickup, or on-top the battery tray if hummer, outside the housing if generator.
JMJNet
Recruit
Did it happen after you replace PMD? OR what did you do in terms of repair/part replacement before this bucking happened?