Welcome Visitor! Please take a few seconds and wadehilts
New Member
- Joined
- Jun 21, 2017
- Messages
- 9
- Reaction score
- 2
- Points
- 3
- Vehicle Year
- 1984
- Make / Model
- Ford
- Transmission
- Manual
Hello all,
I recently rebuilt my dad's 1984 V6 2.8L Cologne Engine. It is the carbureted variant. The original engine got to 210,000 miles before we decided it was time to rebuild when it was leaking oil like crazy.
In the process of rebuilding the engine, I replaced the carburetor with a re-manufactured one (but the original starter motor is still going strong! Amazing).
I am having some problems with the drive-ability of the car, and I suspect it is a fueling condition. My prime suspect is the accelerator pump. Here are the symptoms:
When the truck is at a stand still, if I tip in the accelerator lightly (like you would when slowly pulling out of an intersection) the engine starts to die - seemingly like it is going lean. After this brief lug, the engine jumps back to life and runs fine. This is extremely aggravating and dangerous as there is a big risk of stalling if the driver isn't careful.
A similar scenario will occur when I am on overrun (throttle closed) and lightly apply the throttle.
My initial theory was that the accelerator pump was failing to richen the fuel mixture, as this seems to be a textbook example. However, I wasn't able to determine exactly how to adjust the accelerator pump. The lever that actuates the pump has 3 different positions that it can be set to. I adjusted it to the position that depresses the pump diaphragm the most at it's idle position, thinking that might squirt more gas. No dice.
It's my understanding that these later model carburetors had fairly sophisticated designs to meet emissions, so I was wondering if anyone has any experience with this problem and can point me in the right direction for adjusting anything to fix it?
Thanks,
Wade
I recently rebuilt my dad's 1984 V6 2.8L Cologne Engine. It is the carbureted variant. The original engine got to 210,000 miles before we decided it was time to rebuild when it was leaking oil like crazy.
In the process of rebuilding the engine, I replaced the carburetor with a re-manufactured one (but the original starter motor is still going strong! Amazing).
I am having some problems with the drive-ability of the car, and I suspect it is a fueling condition. My prime suspect is the accelerator pump. Here are the symptoms:
When the truck is at a stand still, if I tip in the accelerator lightly (like you would when slowly pulling out of an intersection) the engine starts to die - seemingly like it is going lean. After this brief lug, the engine jumps back to life and runs fine. This is extremely aggravating and dangerous as there is a big risk of stalling if the driver isn't careful.
A similar scenario will occur when I am on overrun (throttle closed) and lightly apply the throttle.
My initial theory was that the accelerator pump was failing to richen the fuel mixture, as this seems to be a textbook example. However, I wasn't able to determine exactly how to adjust the accelerator pump. The lever that actuates the pump has 3 different positions that it can be set to. I adjusted it to the position that depresses the pump diaphragm the most at it's idle position, thinking that might squirt more gas. No dice.
It's my understanding that these later model carburetors had fairly sophisticated designs to meet emissions, so I was wondering if anyone has any experience with this problem and can point me in the right direction for adjusting anything to fix it?
Thanks,
Wade
