DonsBolt
Bronco Guru
I was going to make a post last night, trying to figure out why my truck has been running like crap about 4300 rpms, but I decided to wait till today and tear into her before I posted for help.
The idle control screws on my main metering block on my 670 truck avenger didn't want to work right. So I called Holley up, and they sent me a new metering block. Put it in, it started awesome, better than it ever did before, idled awesome, and the idle control screws worked better. I knoticed a little stumble at about 4300 rpms, but it felt more like a ignition issue.
A friend had a MSD 6AL he wasn't using anymore, so he gave it to me.(love free stuff) So I swapped it into my truck last week to see if that was the problem, but with the other box it still did the same thing.
The other day I messed around with the carb, played with the accelerator pump, and got rid of the stumble at 4300 in 1st and 2nd gear, but a new stumble satarted in 3rd gear, but at a lower rpm.
This morning I pulled the carb off, and found the replacement metering block had a 25 power valve, instead of the 65 the 670 calls for.
I never even thought to look at the power valve on the part holley sent me. I know I should have looked, but figured they would send me the right one.
Well all is well now, I put the old metering block back on, and the idle screws seem to work now. No idea why they all of a sudden work better. It wasn't untill I took the replacement part off that I even decided to look at the power valve.
I think I am going to crush the 25 power valve, so I can't make the same mistake. Unless someone wants it
The idle control screws on my main metering block on my 670 truck avenger didn't want to work right. So I called Holley up, and they sent me a new metering block. Put it in, it started awesome, better than it ever did before, idled awesome, and the idle control screws worked better. I knoticed a little stumble at about 4300 rpms, but it felt more like a ignition issue.
A friend had a MSD 6AL he wasn't using anymore, so he gave it to me.(love free stuff) So I swapped it into my truck last week to see if that was the problem, but with the other box it still did the same thing.
The other day I messed around with the carb, played with the accelerator pump, and got rid of the stumble at 4300 in 1st and 2nd gear, but a new stumble satarted in 3rd gear, but at a lower rpm.
This morning I pulled the carb off, and found the replacement metering block had a 25 power valve, instead of the 65 the 670 calls for.
I never even thought to look at the power valve on the part holley sent me. I know I should have looked, but figured they would send me the right one.
Well all is well now, I put the old metering block back on, and the idle screws seem to work now. No idea why they all of a sudden work better. It wasn't untill I took the replacement part off that I even decided to look at the power valve.
I think I am going to crush the 25 power valve, so I can't make the same mistake. Unless someone wants it