Holley 1920 accelerator pump issues
Hey all!!
This post is informational as I think it may help others in the future.
I recently had an issue where my 64 dart 225 would bog really hard, have okay-ish idle, but rev all the way up after the initial bog. I tried all of the following to resolve to no avail -
Some old fart with better eyes than me took off the metering block behind the float and noticed it was warped like a parenthesis. (photo 1) You could see light under it when on the bench. When wet testing, fuel was coming out of the top and bottom around the gasket because of the warping. (photo 2) He filed it flat and checked with a micrometer, reinstalled, and boom. Problem was 100% gone.
I still have things to fix on my car but I wanted to provide this insight for others. I think it's possible it was a holley defect, or the result of heat cycles. No cracks were present.
Best of luck guys!!!
Hey all!!
This post is informational as I think it may help others in the future.
I recently had an issue where my 64 dart 225 would bog really hard, have okay-ish idle, but rev all the way up after the initial bog. I tried all of the following to resolve to no avail -
- Rebuild carb, spray with cleaners and air
- Test timing
- Test coil
- Test spark plug wires
- Replace plugs
- Check vacuum advance on distributor
- Verify vacuum connections on carb
- Adjust accelerator pump position (3 position plastic lever)
- Check fuel pressure from pump
- Change fuel filters
- Check for vacuum leaks with spray
- Adjust carb 6 ways to sunday
Some old fart with better eyes than me took off the metering block behind the float and noticed it was warped like a parenthesis. (photo 1) You could see light under it when on the bench. When wet testing, fuel was coming out of the top and bottom around the gasket because of the warping. (photo 2) He filed it flat and checked with a micrometer, reinstalled, and boom. Problem was 100% gone.
I still have things to fix on my car but I wanted to provide this insight for others. I think it's possible it was a holley defect, or the result of heat cycles. No cracks were present.
Best of luck guys!!!
