1997 GMC Savanna 5.7L dies when applying brake

[zaint...@gmail.com]

I have a 1997 GMC Savanna 2500 5.7L cargo van and when ever I apply the
brake and come to a complete stop after going around 60 miles per hour
it dies. No check engine light, no ABS light, nothing.

Does anyone have any ideas why this is happening ?

One person told me that it is a vaccuum leak, but a check engine light
with a vaccuum leak code would be present and there isn't.

Oh, and the brakes are new and I did a tune up around 4K ago.

Any suggestions would be great.

Thank you,

James

[pu...@webtv.net]

>I have a 1997 GMC Savanna 2500 5.7L
> cargo van and when ever I apply the
> brake and come to a complete stop after
> going around 60 miles per hour it dies.
> No check engine light, no ABS light,
> nothing.

>One person told me that it is a vaccuum
> leak, but a check engine light with a
> vaccuum leak code would be present
> and there isn't.

I'm not sure that a vacuum problem in the Brake vacuum booster would not
set an engine trouble code/check engine light.

[Mark Sparge]

--------------------------------------------------------------------------------
It sounds like your lock-up torque converter (tranmission) is not
releasing properly. I have heard that this is not a particularly
expensive fix.

Good Luck,
Mark

[zaint...@gmail.com]

Hello Mark, thank you for your response.

I looked up "lock-up" torque converter in alldatapro and it did not
appear.

This is the only things that come up with Torque converter:

82 Torque Converter
80 Torque Converter Clutch
80 Torque Converter Clutch Solenoid
80 Torque Converter Clutch Solenoid

Maybe it's the solenoid, but this would be just guessing.

[zaint...@gmail.com]

A faulty brake vacuum booster or line would not stall the engine when
applying the brake and there would be symptoms in the brake pedal.

[pu...@webtv.net]

>A faulty brake vacuum booster or line
>would not stall the engine when applying
> the brake and there would be symptoms
>in the brake pedal.

Really!? That was the cause on my truck. Excuse me for attempting to
help.

Dave S(Texas)

[zaint...@gmail.com]

Maybe I'm wrong, was it stalling like mine ?

Alldata Pro doesn't list stalling as one of the factors when the brake
booster is faulty, forgive me for questioning you more.

[Steve W.]

The lock up in the converter uses the clutch listed below. When it goes
into lock-up the clutch is applied and locks the converter to the input
shaft eliminating slippage.

> 80 Torque Converter Clutch
> 80 Torque Converter Clutch Solenoid
> 80 Torque Converter Clutch Solenoid

When it dies how does it happen? You come up to a light and step on the
brake and you hear the engine lug down and die OR does it shut off like
you turned the key off? The usual symptom of the locked converter is
that the engine struggles a bit as it dies, kind of like the way a stick
shift acts if you are not careful letting out the clutch.

--
Steve W.

"Life should NOT be a journey to the grave with the intention of
arriving safely in an attractive and well preserved body, but rather to
skid in sideways, BBQ in one hand, martini in the other, body
thoroughly used up, totally worn out and screaming: "WOO HOO what a ride!"

[zaint...@gmail.com]

Hello Steve,

The engine struggles a bit as it dies, kind of like the way a stick
shift acts if you are not careful letting out the clutch. This is
exactly what happens, it takes a couple of seconds and then dies.

So, where is this converter located or how do I fix it ?

Thank you,

James

[james...@gmail.com]

I installed a new EGR and the same problem occurs, anyone have any
idea's ?

[warrenry]

Had the same problem with 90 Cavalier. Changed the torque converter
lockup clutch solenoid and it works perfect. It was easy on the front
drive, just remove the side cover, replace the solenoid and that was
it. Maybe somone in this NG with more knowledge about your van can
tell you how to change yours. I would almost think the solenoid on
yours would be under the pan or under a side cover. Hope the info
helps.

Warren