New LS1 Owners - Newbie Tech Basic Technical Questions & Advice
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Old Mar 18, 2021 | 10:55 AM
  #1  
Robz T/A's Avatar
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wassup erybody im chasing a ghost car is 98 trans am lq9 92mm ebay TB with a ls3 top end turbo,,,, the issue im having is everytime i push the brakes the car dies , my car wasnt doing any of this weird stuff before i went with the ls3 top end stuff before the swap i had 243 heads n ls6 intake everything was fine intil i changed setups
so when i put in in gear the car shuts off but if i put it in gear and let off the brakes immediately the car will stay on, and during thru all of this my brakes all of a sudden goes to the floor which just started happening,, any ideas im thinking brake booster or something
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Old Mar 18, 2021 | 07:31 PM
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Yeah, bad booster. disconnect the booster and plug the vacuum hose going to the booster. See if it stalls then.
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Old Mar 24, 2021 | 08:24 AM
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I agree with jetech. Try that first. If it only does it when you press the brakes that’s really all it could be. Unless you got a map sensor reading crazy when it sees a change in pressure from mashing the brakes. If it still does it after you cap the brake booster hose try it again by unplugging the map sensor. By unplugging it it will go into open loop. I wouldn’t try driving with it unplugged but at least idleing while you press brake to see if the symptom changes
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