surging idle, rough at low/no load
11-16-2008, 08:22 PM
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surging idle, rough at low/no load
'89 T/A 350 TPI
At idle the engine surges between 500 & 1100rpm.
When I snap the throttle it has good response, but pops after I release it.
On the road, it has good throttle response & acceleration. In low/no load conditions (steadly speed on level & downhill roads) the car constantly jumps, like when a fuel pump is cutting out, only constant & regular.
Engine sounds/feels like it's missing badly.
The fans don't seem to be switching on either.
No check engine light.
Over the past 6 weeks to 2 months it's had new cap, rotor, wires, spark plugs, 1 new injector & TPS.
At idle the engine surges between 500 & 1100rpm.
When I snap the throttle it has good response, but pops after I release it.
On the road, it has good throttle response & acceleration. In low/no load conditions (steadly speed on level & downhill roads) the car constantly jumps, like when a fuel pump is cutting out, only constant & regular.
Engine sounds/feels like it's missing badly.
The fans don't seem to be switching on either.
No check engine light.
Over the past 6 weeks to 2 months it's had new cap, rotor, wires, spark plugs, 1 new injector & TPS.
11-16-2008, 08:29 PM
#2
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Car: 85 camaro z28
Engine: 305 but i got a '70 350 LT1
Transmission: 700r4
Axle/Gears: 3.08
Re: surging idle, rough at low/no load
do you have a carburetor or fuel injection?
11-16-2008, 08:40 PM
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Car: 1991 transam
Engine: 305 30 over long tubes into 3" y
Transmission: 700r4
Axle/Gears: 4:10
Re: surging idle, rough at low/no load
go to the homepage and look at the tech articles look at how to set tps and iac,jimmy
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