And todays problem(s) is.....
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
Likes: 350
From: No Where USA
And todays problem(s) is.....
Brake lights not working. They were giving me some trouble yesterday and thought it might be a wiring problem. Rewired the lights in the back, they were bubbaed. Soldiered everything, taped it up nice. Now they don't work at all. Everything else works but the brakes and the 4 way flashers. The switch I have has a connector on the top and the one in the back. The lights work if I jump from a hot to the brake wires.
Next problem.....took the car out for a nice ride yesterday saw the brake light weren't working right so I parked the car. Rewired the rear lights, and had a piece of PVC holding down the brake pedal to check the lights. Couldn't get the lights to work so I went to start the car, when I started it the motor raced up to 1500 rpm and stayed there. Not a vacuum leak , when I close off the top of the carb the engine stalls. Linkage works nothing is hanging up. I just parked the car and shut it off. 383, holley vacuum secondary carb. Replaced the headlight switch the other day, but the brakes lights were working after I did it.
Next problem.....took the car out for a nice ride yesterday saw the brake light weren't working right so I parked the car. Rewired the rear lights, and had a piece of PVC holding down the brake pedal to check the lights. Couldn't get the lights to work so I went to start the car, when I started it the motor raced up to 1500 rpm and stayed there. Not a vacuum leak , when I close off the top of the carb the engine stalls. Linkage works nothing is hanging up. I just parked the car and shut it off. 383, holley vacuum secondary carb. Replaced the headlight switch the other day, but the brakes lights were working after I did it.
Last edited by 540 vette; Sep 29, 2014 at 04:48 PM.
Le Mans Master
Joined: Oct 2006
Posts: 6,842
Likes: 285
From: Palmdale CA
Brake lights not working. They were giving me some trouble yesterday and thought it might be a wiring problem. Rewired the lights in the back, they were bubbaed. Soldiered everything, taped it up nice. Now they don't work at all. Everything else works but the brakes and the 4 way flashers. The switch I have has a connector on the top and the one in the back. The lights work if I jump from a hot to the brake wires.
Next problem.....took the car out for a nice ride yesterday saw the brake light weren't working right so I parked the car. Rewired the rear lights, and had a piece of PVC holding down the brake pedal to check the lights. Couldn't get the lights to work so I went to start the car, when I started it the motor raced up to 1500 rpm and stayed there. Not a vacuum leak , when I close off the top of the carb the engine stalls. Linkage works nothing is hanging up. I just parked the car and shut it off. 383, holley vacuum secondary carb. Replaced the headlight switch the other day, but the brakes lights were working after I did it.
Next problem.....took the car out for a nice ride yesterday saw the brake light weren't working right so I parked the car. Rewired the rear lights, and had a piece of PVC holding down the brake pedal to check the lights. Couldn't get the lights to work so I went to start the car, when I started it the motor raced up to 1500 rpm and stayed there. Not a vacuum leak , when I close off the top of the carb the engine stalls. Linkage works nothing is hanging up. I just parked the car and shut it off. 383, holley vacuum secondary carb. Replaced the headlight switch the other day, but the brakes lights were working after I did it.
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
Likes: 350
From: No Where USA
For the brakes use a multimeter and test for continuity of the switch. As for the motor, check to see if the distributor tie down bolt is loose and it may have moved. Look over all the vacuum lines carefully. Then unplug them and put plugs on the carb itself. Start it up and see if the problem is still there, then plug one in at a time (brake booster, distributor advance, etc). Next, test the vacuum cans to see that they hold vacuum and aren't leaking internally.
Just got another brake light switch, that solved that problem.
As for the motor, distributor didn't move, checked all the vacuum lines. When you close the choke the car dies. I just shut it off last night and went to start it today and had the problem.
Le Mans Master
Joined: Oct 2006
Posts: 6,842
Likes: 285
From: Palmdale CA
One down, one to go. Did you disconnect the throttle cable, completely off the carb yet? And true, the vacuum lines may all be there, but what did the check involve? Just seeing if they were there? Or did you disconnect them completely from the carb and see how it ran?
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
Likes: 350
From: No Where USA
Throttle cable is good, checked that out. It has to be a vacuum problem but what thru me off is when I close the choke flap the car dies. Thanks for the help F22 I am going to call it a night. I had a busy day. Found out my Jeep needs a transfer box, right side axle, and bearing hub. Also painted the front bumper for my 2013 Maxima that my daughter broke.
I just wanted to get in the vette and take a nice ride after having an aggravating day.
I will check the rest of the stuff tomorrow.
Le Mans Master
Joined: Oct 2006
Posts: 6,842
Likes: 285
From: Palmdale CA
Throttle cable is good, checked that out. It has to be a vacuum problem but what thru me off is when I close the choke flap the car dies. Thanks for the help F22 I am going to call it a night. I had a busy day. Found out my Jeep needs a transfer box, right side axle, and bearing hub. Also painted the front bumper for my 2013 Maxima that my daughter broke.
I just wanted to get in the vette and take a nice ride after having an aggravating day.
I will check the rest of the stuff tomorrow.
I just wanted to get in the vette and take a nice ride after having an aggravating day.
I will check the rest of the stuff tomorrow.
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
Likes: 350
From: No Where USA
Back to my idle problem. Disconnected the vacuum lines and plugged them all. Idled fine until I hit the gas and then the idle jumped to 1500. Put everything back to the way it was. Had an extra PVC valve changed that and the line. Same thing. Readjusted the throttle linkage. Idled fine until I hit the gas and then it went up to 1500. Remember I drove it on Sunday and it ran great, parked the car went to start it on Monday and had this problem. Distributor is tight, intake bolts are all tight. New carb on the car, maybe it got some dirt into it. The car will sit and idle normally until I hit the gas them when I let the pedal go the idle will go up to 1500.
Racer
Joined: Aug 2004
Posts: 419
Likes: 4
From: Lewisville TX
Did you also remove the vacuum from the manifold?
Mine had a leaky brake booster.. kept the idle high. I also have a TH400 which has a vac line going to a module in the trans. Something is keeping your idle high.. Check your choke assy too. If it's sticking that could be it.
Mine had a leaky brake booster.. kept the idle high. I also have a TH400 which has a vac line going to a module in the trans. Something is keeping your idle high.. Check your choke assy too. If it's sticking that could be it.
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Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
Likes: 350
From: No Where USA
Did you also remove the vacuum from the manifold?
Mine had a leaky brake booster.. kept the idle high. I also have a TH400 which has a vac line going to a module in the trans. Something is keeping your idle high.. Check your choke assy too. If it's sticking that could be it.
Mine had a leaky brake booster.. kept the idle high. I also have a TH400 which has a vac line going to a module in the trans. Something is keeping your idle high.. Check your choke assy too. If it's sticking that could be it.
Took all the vacuum off and plugged everything. Manual choke, checked that and it looks fine.
The idle isn't high when you first start it. As soon as you give it gas ans let the pedal go the idle will go up.
Melting Slicks
Joined: Sep 2011
Posts: 3,372
Likes: 215
From: Peoria Arizona
You mentioned that this is a new carb - new out of the box carb? If so, it's very possible that it sat on a shelf for long periods and the gaskets shrunk up on it causing a internal vacuum leak etc.
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
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From: No Where USA
New carb. It ran good for a few months, then overnight they shrink? I bought some gaskets, it's worth the shot.
Thread Starter
Race Director
Joined: Jan 2002
Posts: 11,615
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From: No Where USA
Le Mans Master
Joined: Oct 2006
Posts: 6,842
Likes: 285
From: Palmdale CA
You might also remove the carb and make sure the throttle plate screws are tight as well.
Thread Starter
Race Director
Joined: Jan 2002
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From: No Where USA
Well I took the carb off, cleaned and lubricated the linkage, tightened the carb bolts under the carb and reinstalled carb with a new base gasket. Started it up and it ran great.
I could not pin point a problem but what ever I did helped.
I could not pin point a problem but what ever I did helped.
Le Mans Master
Joined: Oct 2006
Posts: 6,842
Likes: 285
From: Palmdale CA
Melting Slicks
Joined: Sep 2011
Posts: 3,372
Likes: 215
From: Peoria Arizona
Glad you got it figured out. I've run a lot of Holley carbs over the years, and had this type of thing happen to me as well.Adam