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Engine miss when braking
https://mail.slantsix.org/forum/viewtopic.php?t=4431		 Page 1 of 1
Author:  Seis Inclinaod [ Sat Nov 09, 2002 10:36 pm ]
Post subject:  Engine miss when braking
Volare 79 auto power brakes. When idling if I press the brake pedal the engine misses as if it there is a vacuum leak. That is, press the brake pedal engine goes pft pft pft for a few seconds but then recovers to normal idling even if the brake continues to be applied. Press it again and engine misses..
What do I look for to correct this faillure?

Rafa
Author:  squeek360 [ Sat Nov 09, 2002 11:10 pm ]
Post subject: 
I would suspect a problem with the vacuum check valve
Author:  Chuck [ Sat Nov 09, 2002 11:26 pm ]
Post subject: 
Perhaps a leak in the vacuum diaphragm.
Author:  Matt Cramer [ Sun Nov 10, 2002 1:08 pm ]
Post subject:  Check the booster.
The brake booster uses engine vaccum. There's probably a leak in it somewhere.
Author:  Doctor Dodge [ Sun Nov 10, 2002 1:47 pm ]
Post subject:  Leaking Power Break Booster
I would guess that the Power Booster is leaking, or the check valve is stuck open.
Both are pretty easy to check, see if the booster holds a vacuum.
DD
Author:  Seis Inclinado [ Sun Nov 10, 2002 6:21 pm ]
Post subject:  Leaking brake booster
Thanks guys. You all seem to agree on your diagnosis.
I'll check it out and let you know what I find out.

Rafa
Author:  elam [ Mon Nov 11, 2002 5:45 pm ]
Post subject: 
It's the booster probablly, maybe the check valve. Get a check valve at the local NAPA, they're cheap. If that isn't it, the booster is toast. You can hear them hiss somtimes.
Author:  Seis Inclinado [ Wed Nov 27, 2002 8:51 pm ]
Post subject:  Leaking Power Booster
Again thank you all for your quick replies. I'm sorry I could not get back to you sooner but couple of business trips kept me from getting my hands on the Volare, plus another problem, this time electrical, which I was not prepared to deal with. Engine just quit running at a stop light never to be able to come to life again, so I had to take to the mechanic to fix while I was away. Anyway... I found the leak. It was actually the hose to the booster what was dry and did not seal well on one of its ends.
Thank you elam for suggesting NAPA for the required part, but, :) he he, there are no NAPA, Pep Boys, AutoZone or any of this type of auto parts stores this side of Rio Grande. Guess a new check valve will have to wait until my next trip to the USA.

Rafa
Author:  Chuck [ Sat Nov 30, 2002 11:34 am ]
Post subject: 
Rafa,

Maybe someone can send you one.
Author:  Seis Inclinado [ Tue Dec 03, 2002 12:07 pm ]
Post subject:  Engine Miss when Braking
Well, I'm a lucky guyafter all. Damage to a shipment of products :cry: the company I work for took me for a quick trip to the Mexico/USA border at Laredo, TX during the weekend. 8) Of course I visited :D NAPA and PeP Boys and found one, only one, booster check valve which I will install next week end, if and when I the electrical problem I mentioned before gets solved.

Thanks Chuck for your idea of having someone send a unit to me, but I think we might run into some sort of lengthy red tape with mexican customs :twisted:

Rafa
Author:  Chuck [ Mon Dec 09, 2002 2:26 pm ]
Post subject: 
Let me know if you need help with the electrical, my specialty.
Author:  Guest [ Sat Dec 14, 2002 9:52 pm ]
Post subject:  Electrical
Hi Chuck. Yes I will need help with the electrical issues I'm having. Thanks.
Unfortunately heavy workloads at work are not letting me give some time to the car. It's been parked for a couple of weeks now. :oops:
I will have some time this weekend and try again. I have changed distributor, ign. module, ballast resistor, plug wires and starter relay to no avail. Ohm testing of coil shows ok but I'll change it sunday anyway.
There is enough gas, float level is per specs -1/4" from crown of floats to top of bowl- Carter BBD, but plugs are black with a velvety soft coat of carbon, -not a crust- which makes me believe it's firing off a weak spark :shock:

Will see what I can come up with sunday.

Rafa
Author:  Chuck [ Tue Dec 17, 2002 11:12 am ]
Post subject: 
You can reach me at sl6@omnipages.com.
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