Idles fine - under load over 30-45 km/h hard stutters
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Joined: Dec 2022
Posts: 2
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Idles fine - under load over 30-45 km/h hard stutters
Hey all!
I have a 85’ Trans am w a 305 and an auto trans. I’ve done a lot to get the car up and running again and she idles like a champ. I took it out to a show last night and she barely made the 10 min trip. Under acceleration or load she stutters HARD and boarder line stalls out. Could it be a spark issue? A fuel delivery issue or am I over looking something completely!? Any suggestions would be amazing!
I have a 85’ Trans am w a 305 and an auto trans. I’ve done a lot to get the car up and running again and she idles like a champ. I took it out to a show last night and she barely made the 10 min trip. Under acceleration or load she stutters HARD and boarder line stalls out. Could it be a spark issue? A fuel delivery issue or am I over looking something completely!? Any suggestions would be amazing!
Joined: Apr 2017
Posts: 1,149
Likes: 445
From: Northern NY
Car: 1988 Trans Am GTA and 1979 Trans Am
Engine: 5.7 L98
Transmission: 700R4
Axle/Gears: Borg Warner 9 bolt 3.27
Re: Idles fine - under load over 30-45 km/h hard stutters
Is the car TPI or carb? Start with the basics, I would check fuel pressure and go from there, how long ago was the fuel filter changed etc.?
Member
Joined: Jan 2008
Posts: 329
Likes: 100
From: Mint Hill, NC
Car: '90 Formula '88 GTA
Engine: 305 TPI 350 TPI
Transmission: T5 700R4
Axle/Gears: 3.42 10 Bolt 3.27 9 bolt
Re: Idles fine - under load over 30-45 km/h hard stutters
could be fuel for sure - my 88 GTA had similar behavior under load when the fuel pump was dying. As Reddragon said easy stuff first, check fuel pressure first on the schrader valve - check condition of a spark plug or two - check your distributor rotor and cap condition
Supreme Member
Joined: Jan 2000
Posts: 1,215
Likes: 97
From: Mississauga, Ontario Canada
Car: 1987 GTA
Engine: 5.7
Transmission: T5WC
Axle/Gears: 3:27
Re: Idles fine - under load over 30-45 km/h hard stutters
Hey all!
I have a 85’ Trans am w a 305 and an auto trans. I’ve done a lot to get the car up and running again and she idles like a champ. I took it out to a show last night and she barely made the 10 min trip. Under acceleration or load she stutters HARD and boarder line stalls out. Could it be a spark issue? A fuel delivery issue or am I over looking something completely!? Any suggestions would be amazing!
I have a 85’ Trans am w a 305 and an auto trans. I’ve done a lot to get the car up and running again and she idles like a champ. I took it out to a show last night and she barely made the 10 min trip. Under acceleration or load she stutters HARD and boarder line stalls out. Could it be a spark issue? A fuel delivery issue or am I over looking something completely!? Any suggestions would be amazing!
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