Ok guys, this is really starting to **** me off.

Car idles JUST fine, runs just fine, everything is GREAT.

But when i brake heavily, or especially when i brake hard and turn, the car DIES!@$!???
Very not good when you're in the middle of traffic.
So whats going on?
Torque converter?
Brake booster? HELP!

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1985 IROC-Z
TPI 305, 700R4 with shift kit, richmond 3.73's, auburn pro series posi, crane compucam 2030, ported plenum, gutted air boxes, all the little insignificant stuff.

 

When this happens, does the car stumble first before dying? Also does it happen only when you are low on gas? I'll take a guess and say that you're fuel pump is being starved during the hard braking and cornering. The g-forces make the fuel move around inside the gas tank, and since the pump is stationary it can be starved of it's supply of gas(same thing happens inside the oil pan). Some of the later third gen cars have gas tanks with baffles that supposedly keep the fuel pump submerged in fuel. I say supposedly, because I've got a '92 and I remember having to make a panic stop and the engine started to stumble like it wanted to die.

I'm not too sure on the best ways to cure the problem, but I'd say try keeping the tank somewhat full and see if it helps.

 

Thats a good start!

I only fill up $5 at a time

But..... its fuller today than it was yesterday.... and this only happens SOMETIMES, yes though, it does stumble.
and the fuel pump is BRAND new

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1985 IROC-Z
TPI 305, 700R4 with shift kit, richmond 3.73's, auburn pro series posi, crane compucam 2030, ported plenum, gutted air boxes, all the little insignificant stuff.

 

My car does the same thing, but it does not stumble. Just shuts off like you turned off the key. It does it no matter how full the tank is. I attributed it to my carb, 750 Edelbrock performer, I adjusted the floats but does not help.

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82 Camaro Z28
355 w/4 bolt mains
9:1 comppresion
Federal Mougal Forged Aluminum pistons
heavily ported 882 heads
gasket matched Torker intake Edelbock Performer 750 carb
Speed pro cam 222 @.05 .447 lift
Edelbrock Flow Pro 1002 air cleaner
Headman headers with straight pipes
Borg Warner T-10
Posi
Fiber glass hood
Another 82 Camaro Z28
Black w/blue pearl w/silver racing stripes
355
Edelbrock Performer intake and 750 carb
Pro Flo 1002 Air cleaner
4 bolt mains
69 camaro heads 64cc
9:1 compression
TH-350 w/stage 2 shift kit
275/60R15 out back
205/60R15 front