Renken2000Classic
Petty Officer 1st Class
- Joined
- May 10, 2022
- Messages
- 201
Thought I'd throw this issue out for consideration. It's an intermittent problem, happening usually under hard acceleration, and is sometimes right after a shift (though I've no idea what the trans would have to do with it). It seems like fuel starvation as it runs pretty well otherwise, and isn't misfiring when that happens, just losing power.
It's a 200k+ miles engine and 185k+ trans (400THM). Valve stem seals have needed replacing for a good while, and I think there are 3 plug extenders in there now. Last time I changed them they were fairly clean.
Here's what I've tried:
- Adjusting the secondary flappers to not open quite so soon/easily (set screw on the rear RH side), but that didn't fix it
- Changing the inline filter ahead of the fuel pump (it worked great right after that)
- Removing temporarily the filter at the carb
I haven't checked fuel pressure or flow, but my next thing will probably be to just replace the pump (it's a chain store one, maybe 5 years old). Other than that I'm wondering about maybe the carb needing done again (did that 5 years or so ago too), or some weird thing with the trans causing it that I've never heard of (lol).
It's a 200k+ miles engine and 185k+ trans (400THM). Valve stem seals have needed replacing for a good while, and I think there are 3 plug extenders in there now. Last time I changed them they were fairly clean.
Here's what I've tried:
- Adjusting the secondary flappers to not open quite so soon/easily (set screw on the rear RH side), but that didn't fix it
- Changing the inline filter ahead of the fuel pump (it worked great right after that)
- Removing temporarily the filter at the carb
I haven't checked fuel pressure or flow, but my next thing will probably be to just replace the pump (it's a chain store one, maybe 5 years old). Other than that I'm wondering about maybe the carb needing done again (did that 5 years or so ago too), or some weird thing with the trans causing it that I've never heard of (lol).