I had Head gaskets replacement/ fuel pump , lt1 5.7 camaro got alot more too do ..but she running good.... but 1 day went on short trip, on the way back shut off, it wouldn't restart... for a hour , but she started...20-30 same shuts off..., restarts later 30 every time shuts off...I'm taking it too shop
If your Impala is stalling at stoplights after a tune-up but runs well on the highway, there are a few potential issues to consider. One possibility is a malfunctioning Idle Air Control Valve (IAC), which may not regulate the idle speed properly. Another potential culprit could be a clogged fuel filter or a failing fuel pump, affecting fuel delivery at idle. You might also have a vacuum leak that disrupts the air-fuel mixture, leading to stalling. Additionally, a faulty Throttle Position Sensor (TPS) can misreport throttle position, impacting how the engine idles. Electrical issues, such as loose connections or corroded wiring, could contribute to the problem as well. It’s also worth checking the EGR (Exhaust Gas Recirculation) system, as a stuck-open valve can introduce too much exhaust gas into the intake. I would eliminate these problems one by one until it is found and fixed. Hope this helps. Good Luck.
I had Head gaskets replacement/ fuel pump , lt1 5.7 camaro got alot more too do ..but she running good.... but 1 day went on short trip, on the way back shut off, it wouldn't restart... for a hour , but she started...20-30 same shuts off..., restarts later 30 every time shuts off...I'm taking it too shop
"consult professional mechanic"
sometimes those words is a win or lose.
if the mechanic is good and honest, you win. if not you lose double or triple.
Why does my Impala stalls after a complete tuneup . It only stalls at stop light . But it runs fine on the highway .
If your Impala is stalling at stoplights after a tune-up but runs well on the highway, there are a few potential issues to consider. One possibility is a malfunctioning Idle Air Control Valve (IAC), which may not regulate the idle speed properly. Another potential culprit could be a clogged fuel filter or a failing fuel pump, affecting fuel delivery at idle. You might also have a vacuum leak that disrupts the air-fuel mixture, leading to stalling. Additionally, a faulty Throttle Position Sensor (TPS) can misreport throttle position, impacting how the engine idles. Electrical issues, such as loose connections or corroded wiring, could contribute to the problem as well.
It’s also worth checking the EGR (Exhaust Gas Recirculation) system, as a stuck-open valve can introduce too much exhaust gas into the intake. I would eliminate these problems one by one until it is found and fixed. Hope this helps. Good Luck.
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