# I need your help

**URL:** <https://community.cartalk.com/t/i-need-your-help/36414>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, impala\
**Created:** [September 10, 2009, 6:00pm UTC](https://community.cartalk.com/t/i-need-your-help/36414 "2009-09-10T18:00:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![PURPLETULIP](https://avatars.discourse-cdn.com/v4/letter/p/bc79bd/32.png) [@PURPLETULIP](https://community.cartalk.com/u/PURPLETULIP)\
**Post date:** [September 10, 2009, 6:00pm UTC](https://community.cartalk.com/t/i-need-your-help/36414/1 "2009-09-10T18:00:30Z")

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MY CAR HAS STOPPED WHILE DRIVING 4 TIMES ALREADY. THE GARAGE CAN’T FIND OUT WITH THEIR COMPUTER BECANSE THERE IS NO WARNING LIGHT COMMING ON. THEY SAID IT COULD BE::: FUEL PUMP IN GAS TANK–SOME KIND OF CENSER,A BARE WIRE. IT’S SCARY NO WARNING JUST STOPS MOSTLY WHEN SLOWING DOWN & ON THE BRAKE AROUND A TURN

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [September 10, 2009, 6:08pm UTC](https://community.cartalk.com/t/i-need-your-help/36414/2 "2009-09-10T18:08:01Z")

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What year?  
What engine?  
What’s the mileage?  
What’s the maintenance history been?

There are countless possibilities the shop can check without needing a CEL to point them in a direction. Fuel pump pressure is one. You need a new shop.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [September 10, 2009, 6:48pm UTC](https://community.cartalk.com/t/i-need-your-help/36414/3 "2009-09-10T18:48:57Z")

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As I usually do, I agree with mountainbike.  
Just as there is a difference between different makes of cars, there is also a difference between one mechanic and another.  
You need to find a new mechanic.

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [September 10, 2009, 10:39pm UTC](https://community.cartalk.com/t/i-need-your-help/36414/4 "2009-09-10T22:39:40Z")

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I agree there’s not enough info to make much of a guess here.  
If this problem ONLY occurs when you remove your foot from the accelerator pedal then my guess would be an Idle Air Control valve problem; either a dirty or defective IAC. Cleaning it may help.

Another possibility (same situation, no foot on the pedal) could be a dirty/corroded junction terminal at the positive battery cable. Idle speed drops, alternator output drops, a huge electrical load is still applied, and a corroded terminal may not be allowing enough current to pass which could lead to a voltage drop and an engine shutdown.

I would think if it were a pump problem this would show up in situations where your foot is applied to the accelerator pedal. Hope I read your post right and there’s a couple of educated (read, wild) guesses anyway.