<----->What's my problem?????<------>
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
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<----->What's my problem?????<------>
Today was beautiful! The sun was out, the temp was up so I waxed the car and hopped in to take a drive. When I started it, it was a little hesitant to start. No big deal, sometimes like that. Got it started then the idle went way down and started to die. I revved the engine to keep it alive. When I began pulling out the car from the garage, it didn't feel like there was any brake pressure. I drove onto the street, definitely no power brakes and the engine idle kept way down around 500.
This is all very strange because I took a drive last night and it was fine. No signs what so ever. It's an 89 coupe 6spd with 70k miles. What could the problem be? Please help. :cuss :banghead: :cuss
This is all very strange because I took a drive last night and it was fine. No signs what so ever. It's an 89 coupe 6spd with 70k miles. What could the problem be? Please help. :cuss :banghead: :cuss
Safety Car
Joined: Jul 2001
Posts: 3,833
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From: Orange County California
Re: <----->What's my problem?????<------> (89Corvette6spdFX3)
That does sound very strange... Im probably off the mark here, but could it be your serp belt? Was there anything else?
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
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Re: <----->What's my problem?????<------> (McShagger)
I've replace the belt about a year ago, but I suppose that could be it. It's very strange. I hope I can figure it out without spending my savings. I'm sure it's something fairly simple. :cry
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Re: <----->What's my problem?????<------> (McShagger)
Im probably off the mark here, but could it be your serp belt? Was there anything else?
RACE ON!!!
[Modified by CFI-EFI, 10:43 AM 3/1/2004]
Team Owner
Joined: Sep 2003
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From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Re: <----->What's my problem?????<------> (JCAIRE2)
check the power brake booster, or, the hose that supplies it with vacuum. :iagree:
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Team Owner
Joined: Aug 2000
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From: San Pedro CA
Re: <----->What's my problem?????<------> (VictorRussell'92)
check the power brake booster, or, the hose that supplies it with vacuum. :iagree:
:withstupid:
:withstupid:
Safety Car
Joined: Feb 2002
Posts: 4,212
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From: Sun City West Az
Re: <----->What's my problem?????<------> (bogus)
check the power brake booster, or, the hose that supplies it with vacuum. :iagree:
:withstupid:
is it me, or am I being ignored? :D
:withstupid:
is it me, or am I being ignored? :D
Thread Starter
Safety Car
Joined: Jul 2003
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Re: <----->What's my problem?????<------> (ittlfly)
Nope, no codes. So would the power brake vacume adversely affect the idle? Why would the car be fine 12 hours before? I didn't run it hard or slam on the brakes either. :confused:
Racer
Joined: Dec 2003
Posts: 378
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Re: <----->What's my problem?????<------> (89Corvette6spdFX3)
Check the brake booster vacuum connection and the one to the plenum. If you have no power brakes then this is signs of your brake booster going out, I experienced the same problem this past summer. Good Luck!
Le Mans Master
Joined: Oct 2003
Posts: 6,130
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From: seattle WA
Re: <----->What's my problem?????<------> (89Corvette6spdFX3)
:iagree: :iagree: :iagree: :iagree: :iagree: Definetly vacumn, who knows when it's GOING TO HAPPEN :D you didn't read about mice did you! :lolg:
Thread Starter
Safety Car
Joined: Jul 2003
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Re: <----->What's my problem?????<------> (-=Persephone=-)
So, the brake booster would cause the engine to stumble? Is the booster hard to replace? I have a brake bias spring I bought from Ecklers, maybe this is the time to install it. Does it make much difference in the stopping power of the brakes?
Race Director
Joined: Sep 2000
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From: The Top of Utah
Re: <----->What's my problem?????<------> (89Corvette6spdFX3)
Bogus,
I guess so. You and me, both. I tried to give you credit. I agreed with you and then he asked me if I had any suggestions???
If the hose to the booster is off or leaking, OR if there is a problem with the diaphragm, it will cause a vacuum leak, which will affect the idle. AND the brakes.
RACE ON!!!
is it me, or am I being ignored?
So, the brake booster would cause the engine to stumble?
RACE ON!!!
Team Owner
Joined: Aug 2000
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From: San Pedro CA
Re: <----->What's my problem?????<------> (CFI-EFI)
Bogus,
is it me, or am I being ignored? I guess so. You and me, both. I tried to give you credit. I agreed with you and then he asked me if I had any suggestions???
is it me, or am I being ignored? I guess so. You and me, both. I tried to give you credit. I agreed with you and then he asked me if I had any suggestions???
So, the brake booster would cause the engine to stumble? If the hose to the booster is off or leaking, OR if there is a problem with the diaphragm, it will cause a vacuum leak, which will affect the idle. AND the brakes.
RACE ON!!!
RACE ON!!!
power brakes, for the most part, are powered by what? VACUUM. Vacuum, unless otherwise noted, is provided by the intake manifold.
Now... let us take these 2 items and put them together.
If the hose decides to break, you will lose power brakes.... and the engine will run like crap. if the booster blows up, you will lose power brakes and the engine will run like crap.
Finally, the bias spring goes into the master cylinder.
this concludes this lesson. :rolleyes:
Instructor
Joined: Feb 2004
Posts: 129
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From: Modesto CA
Re: <----->What's my problem?????<------> (Bruthish)
Plug off the vacuum from your brake booster. Start your engine and see if your idle is stable. While it's running check that vacuum line for cracks. If it turns out that your booster is bad, I would also replace your master cylinder. If you have had to top off your brake fluid lately, my guess is that fluid is leaking through the back of the master cylinder and drawn into the booster. Brake fluid is corrosive and can cause your booster to fail. This happened to my Vett a few years back.
Replacing the booster isn't all that hard to do. I recommend that you remove the 2 nuts holding the master cylinder to the booster and check for brake fluid moisture. If you don't see any wet spots then carefully pull the master cylinder away from the booster so as not to bend the brake lines. There are 3 or 4 nuts that hold the booster to the firewall inside plus the brake peddle linkage. It's abit tight inside but you can get to those nuts with a deep well socket, swivel and extensions lying on your back.
Good luck.... :thumbs:
Replacing the booster isn't all that hard to do. I recommend that you remove the 2 nuts holding the master cylinder to the booster and check for brake fluid moisture. If you don't see any wet spots then carefully pull the master cylinder away from the booster so as not to bend the brake lines. There are 3 or 4 nuts that hold the booster to the firewall inside plus the brake peddle linkage. It's abit tight inside but you can get to those nuts with a deep well socket, swivel and extensions lying on your back.
Good luck.... :thumbs:
Le Mans Master
Joined: Aug 2003
Posts: 9,884
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Re: <----->What's my problem?????<------> (bogus)
check the power brake booster, or, the hose that supplies it with vacuum. :iagree:
:withstupid:
is it me, or am I being ignored? :D
:withstupid:
is it me, or am I being ignored? :D
Thread Starter
Safety Car
Joined: Jul 2003
Posts: 4,928
Likes: 1
Re: <----->What's my problem?????<------> (bogus)
Bogus,
is it me, or am I being ignored? I guess so. You and me, both. I tried to give you credit. I agreed with you and then he asked me if I had any suggestions???
I feel your pain... and appreciate the support. :thumbs:
So, the brake booster would cause the engine to stumble? If the hose to the booster is off or leaking, OR if there is a problem with the diaphragm, it will cause a vacuum leak, which will affect the idle. AND the brakes.
RACE ON!!!
Let's review... what happens when there is a vacuum leak? the mixture leans out like a ****.
power brakes, for the most part, are powered by what? VACUUM. Vacuum, unless otherwise noted, is provided by the intake manifold.
Now... let us take these 2 items and put them together.
If the hose decides to break, you will lose power brakes.... and the engine will run like crap. if the booster blows up, you will lose power brakes and the engine will run like crap.
Finally, the bias spring goes into the master cylinder.
this concludes this lesson. :rolleyes:
is it me, or am I being ignored? I guess so. You and me, both. I tried to give you credit. I agreed with you and then he asked me if I had any suggestions???
I feel your pain... and appreciate the support. :thumbs:
So, the brake booster would cause the engine to stumble? If the hose to the booster is off or leaking, OR if there is a problem with the diaphragm, it will cause a vacuum leak, which will affect the idle. AND the brakes.
RACE ON!!!
Let's review... what happens when there is a vacuum leak? the mixture leans out like a ****.
power brakes, for the most part, are powered by what? VACUUM. Vacuum, unless otherwise noted, is provided by the intake manifold.
Now... let us take these 2 items and put them together.
If the hose decides to break, you will lose power brakes.... and the engine will run like crap. if the booster blows up, you will lose power brakes and the engine will run like crap.
Finally, the bias spring goes into the master cylinder.
this concludes this lesson. :rolleyes:
Secondly, my first thought when this happened was to check the brake booster line which turned out to be fine. It was the first thing I checked even before I posted. I'm not a complete idiot as you would like to think.
I also didn't know I couldn't ask a simple question about the bias spring.
As for dzierke, thank you for not going off on me. A little advice towards how to check these things is greatly appreciated! I thought that was what this place was about. Not ripping other vette guys apart.
:skep: :rant: Okay, I'm done.