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10-19-2020, 11:21 PM
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Mr. Cheyenne
 
Join Date: Jun 2020
Location: Kyle, Texas
Posts: 1,687
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Hard Starting Hot & Intermittent missing / hesitation
350 SBC rebuilt to stock with a "mild cam" and has about 300~400 miles on it. QJet 4BB (matching number for 72 from uscarburetors). It has a Top Street Performance HEI (has a stock look to it, with external coil).
When starting up in the morning or when has sit a rather long time, turn key and boom starts right up. Drive around a good 5~10 miles to get good and hot/warmed up. Say I stop at the gas station, fill up, go into store to get a drink. I have to put the gas pedal to the floor to get it to startup and after which a bit of rough idle then clears up. Timing was rechecked today, well because it ended up not being locked down! Also the fuel pump was replaced today (only part that was reused from before rebuild). Set to 12 degrees and has just shy of 16 for vacuum.
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Richard '72 Chevy C10 Cheyenne *Super WHT/MED BRONZE/WHT SBC 350 | TH350 | LWB | AC | Buddy Seats Upgrades: Tilt | Front Sway Bar | Radio | Sliding Window | Bed Spare w/Lock Bed Rails | Full LEDs | Courtesy Lights | Tachometer | Glovebox Lock & Light | Head Light Relays | *Upgraded Fully Super Trim Last edited by Rich72C10; 10-20-2020 at 02:18 PM. |
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