89 5.0 dies at stop lights

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Brian Bunin - 28 Apr 2006 06:44 GMT

This may be similar to some things that were posted recently, but I'll go
ahead and ask anyways....

Had the 89 Mustang (Automatic) out today and had something odd happen. Every
time I approached a stoplight and hit the brakes to gently slow down, the
engine would die very quietly around 5 mph. Basicly, the tach would
continue to drop, right past idle, down to zero. Pop it into N and hit the
starter and everything's fine. I could put it right into drive and sit there,
waiting for the light, then take off, with no problem. This occured at 5 red
lights and one left turn.

I haven't thouroughly tested it, but it appears that if I let off the brake
and gave it a few sec to coast between hitting the brakes again, I could stop
without this happening. In all other respects, the engine is running just
perfectly. Acceleration is smooth, Idle is smooth, etc.

WTF?

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CCTGENE - 28 Apr 2006 13:09 GMT

> This may be similar to some things that were posted recently, but I'll go
> ahead and ask anyways....
[quoted text clipped - 18 lines]
>
> WTF?

My first thought would be the idle control motor.

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Backyard Mechanic - 28 Apr 2006 13:28 GMT

> This may be similar to some things that were posted recently, but I'll
> go ahead and ask anyways....
[quoted text clipped - 14 lines]
>
> WTF?

Next time this happens, drive it in D instead of OD and see what happens
at the next stop.

If all idling, otherwise, is proper it still COULD be the IAC but also
sounds like sluggish Torque Converter Clutch release.

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Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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Brian Bunin - 29 Apr 2006 00:52 GMT

>> This may be similar to some things that were posted recently, but I'll
>> go ahead and ask anyways....
[quoted text clipped - 20 lines]
>If all idling, otherwise, is proper it still COULD be the IAC but also
>sounds like sluggish Torque Converter Clutch release.

OK, drove it in D, rather than OD today.
Problem did not reoccur.
So what does that tell us?

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Backyard Mechanic - 29 Apr 2006 03:32 GMT

> In article <Xns97B356418C986pettyfogery@207.115.17.102>, Backyard
> Mechanic <pettyfog@yaywho.com> wrote:
[quoted text clipped - 30 lines]
>
>>sounds like sluggish Torque Converter Clutch release.

the line directly above..

Make sure you can replicate it, in OD then in D.
If it happens again in OD... then you might try a Transmission flush.

Is the fluid burnt smelling or cloudy

Signature

Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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Brian Bunin - 30 Apr 2006 06:35 GMT

>> In article <Xns97B356418C986pettyfogery@207.115.17.102>, Backyard
>> Mechanic <pettyfog@yaywho.com> wrote:
[quoted text clipped - 37 lines]
>
>Is the fluid burnt smelling or cloudy

Thanks!
Did a tranny flush and it seems OK.
The fluid was a touch cloudy and dark, but didn't smell burnt.

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Backyard Mechanic - 30 Apr 2006 17:14 GMT

>>Is the fluid burnt smelling or cloudy
>
> Thanks!
> Did a tranny flush and it seems OK.
> The fluid was a touch cloudy and dark, but didn't smell burnt.

Now check your slip and see if they changed the filter in the trans... if
they didnt, go back and have it changed.

Signature

Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!

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