Racoonbandit
Newbie
Posts: 6
Reg: 10-26-24
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11-06-24 07:29 PM - Post#2875410
Hello Forum,
Newbie here. I have a 1971 K10 with A SBC carbureted 350. I recently replaced the distributor with a MSD 8360, blaster 2 coil, new wires and plugs. I finally got timing adjusted to 12 degrees BTDC. On initial starts it seems like it’s misfiring for the first 20 seconds or so until I’m able to flutter the gas pedal as it starts to up normal after that. Sometime it will just stall when I put into gear. I have order some hotter AC delco plugs and will install this weekend. I have checked for any vacuum leaks. I did see an issue with e check valve on the brake booster but I’m still seeing the issue. Any ideas why it misfire on initial startup?
Thanks,
Matt
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bobb
Super Senior Member
Posts: 6861
Loc: paradise
Reg: 09-05-03
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11-07-24 07:50 AM - Post#2875417
In response to Racoonbandit
welcome to ct. can you give more details?
| 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails. |
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64ss409
Senior Member
Posts: 1074
Loc: Montana
Reg: 12-04-02
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11-07-24 08:28 AM - Post#2875418
In response to Racoonbandit
Did it misfire with the old distributor?
Ron
1964 SS 409/340 4 spd, bought new Oct '63 from Ken Boggs Chevrolet, Geraldine, Montana
1962 SS convertible, 327/250 4 spd
1956 IH pickup, 327
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 Shepherd
Valued Contributor
Posts: 3605
Loc: Lake George, NY
Reg: 11-11-15
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11-07-24 11:37 AM - Post#2875420
In response to Racoonbandit
Misadjusted choke set too rich or too lean, one possibility.
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Racoonbandit
Newbie
Posts: 6
Reg: 10-26-24
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11-07-24 03:06 PM - Post#2875427
In response to 64ss409
No misfire with the old dist. I haven’t mess with the carb at all. I did initially set the timing wrong when I dropped in the new dist. I was set at zero degree at TDC but I ended up setting it to 12degree BTDC. I’m wondering if I may have fouled a plug or am running wrong plug. Ac delco CR43TS. I just picked up R45TS plugs and will try those and inspect the old plugs.
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69_BOWTIE
Senior Member
Posts: 1226
Loc: WYOMING,USA
Reg: 02-27-02
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11-08-24 06:24 AM - Post#2875431
In response to Racoonbandit
Sounds like the carb needs tweaked a bit like shepherd said, a little air fuel tweaking .
2001 Silverado 4X4
2005 FXDWGI
69 CHEVY C-10 Short Step 327
63 IMPALA 2/DR HRDTOP 327 |
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Racoonbandit
Newbie
Posts: 6
Reg: 10-26-24
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11-10-24 08:35 PM - Post#2875474
In response to 69_BOWTIE
Checked timing again and all connections. Decided to look at the quadrajet carb and noticed the prev owner maybe added a zip tie keeping the chock open for some reason. I cut it out and adjusted the air/fuel screws and idle. I’m gonna run it this way for awhile and see how things go.
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