350 chevy rough idle/engine stalling
04-12-2024, 06:51 PM
#1
Junior Member
Thread Starter
Join Date: Mar 2024
Location: SE USA
Posts: 7
Received 0 Likes
on
0 Posts
Car: 84 Z28
Engine: 350c
350 chevy rough idle/engine stalling
I just got an 84 Z28 recently, it's had a 350 crate enginr put in with a Holly 4 Carb. I've had it for a couple weeks and everything has been fine, but recently the engine has had rough idle, and now it's stalling out mid drive. The engine bay reeks of gas, and oil pressure and battery gauges fluctuate with the rough idle. Engine also shakes with rough idle. Thoughts on potential issues? I'm new to engines so pics/vids on problem solving appreciated.
04-12-2024, 07:10 PM
#2
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,115
Received 1,688 Likes
on
1,283 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 350 chevy rough idle/engine stalling
Sounds like a fuel level problem.
Lower the primary float by about a full turn and see what happens.
If it's a REAL OLD Holley, it might also have a blown-out power valve. If so, get the "protection" kit for that, and of course a new PV.
Lower the primary float by about a full turn and see what happens.
If it's a REAL OLD Holley, it might also have a blown-out power valve. If so, get the "protection" kit for that, and of course a new PV.
The following users liked this post:
NoEmissions84TA (04-13-2024)
04-12-2024, 11:33 PM
#4
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,115
Received 1,688 Likes
on
1,283 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 350 chevy rough idle/engine stalling
Both the engine and carb are new
And somehow that means ... what? that they're "perfect" somehow?
Check the fuel level in the bowls. Great place to start.
04-13-2024, 03:24 PM
#5
Junior Member
Thread Starter
Join Date: Mar 2024
Location: SE USA
Posts: 7
Received 0 Likes
on
0 Posts
Car: 84 Z28
Engine: 350c
Re: 350 chevy rough idle/engine stalling
No of course not, but thanks to your input, I'm looking up videos on how to adjust the fuel levels in the Carb, will report back with my findings
Thread
Thread Starter
Forum
Replies
Last Post
fredbear
Tech / General Engine
3
07-31-2021 01:53 PM