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31  Camaro Research Group Discussion / Maintenance / Re: flooding engine on: October 08, 2010, 04:39:28 PM
Mark:

Yes I should have said that this is a Q-jet carb. It came to me on an engine taken from a 74 Nova. It had a fuel pump that vented back to the fuel tank and I used the pump with the vent plugged for years. Recently I replaced the pump with a 1967 style pump with no vent.
 
I have looked inside the carb and while I don't see the gas entering the engine I believe that it is because the throttle plates appear to be wet. There are no fumes to be seen and no dripping to be seen but when I removed the carb, the right front port had gas in the intake manifold. It's not enough gas that the engine starts with any black smoke so maybe the gas is evaporating before getting into the cylinders. I just have to hold the throttle to the floor and spin it for a dozen spins or so to get it to start. Another clue may be that I'm only getting about 14 mpg.

I worked as a mechanic in the 1970's and tuned and repaired tons of Q-jet engines and never had this kind of problem. I've seen the gas drilpping into the engine when a float valve sticks and I don't see that here. I'm beginning to think that it is the new gas causing a problem somehow. I just don't see it boiling into the engine. Can it maybe ust be evaporating?

I wish that I had a known good spread bore carb to try on there and see if it corrects the problem.

Mike.
32  Camaro Research Group Discussion / Maintenance / Re: flooding engine on: October 08, 2010, 06:44:43 AM
Having a problem after engine,(sb350) is good and hot, will not start after sets 5 min or so without crankkkkking foot to floor.
Have rebuilt the 4bl qjet. Covered all that I thought would be related to carb itself.
Thinking that it might be related to the heat from the exhaust crossover??



I thought I had seen some discussion in the forum relating to this a short time back but can't find anything now.


Any help out there on this?

I've had the carb off about five times and still the engine floods when I shut it off. I proved that the fuel is passing through the carb into the engine by clamping off a rubber section of fuel line between the fuel pump and carb, waiting a half hour and then disconnecting the hose at each end of the clamp. The pump side still had pressure in it and the carb side did not.

So far I have

1 - Cleaned and rebuilt the carb with kit
2 - Installed 1/4" paper gasket under carb
3 - Installed metal plugs in heat ports in manifold
4 - Installed new float needle and seat and gasket with Cliff's improved seat (no fuel inlet windows)
5 - adjusted new brass float leaner that specs (I forget the exact measure offhand)
6 - installed new fuel pump

I even checked the plugs carefully in the bottom of the float bowl by spraying soapy water on the plugs and blowing compressed air into the jet openings inside the bowl. It's a 1974 carb with the improved plugs and they look good.

All this work and still the carb floods the engine and loses float bowl pressure. The engine starts great shortly after stopping and runs great but floods when left to stand a while.  Does anyone know what I missed? I'm stumped.

Mike.




 
33  Camaro Research Group Discussion / Maintenance / Re: exhaust system for convertible on: October 05, 2010, 07:05:42 AM
I ordered an exhaust system from Gardner.most of the other brand required modification for conv.
it suppose to fit no problems on convertible with the original look.
I'll keep you all posted.
I ordered an exhaust system from Gardner.most of the other brand required modification for conv.
it suppose to fit no problems on convertible with the original look.


Sebastion:

How didi it go with the Gardner exhaust? I have a 68 convertible that will be getting new exhaust soon. I'm most concerned with fit and sound .I'm looking for something a little louder than stock.

Mike.

I'll keep you all posted.
34  Camaro Research Group Discussion / Maintenance / Re: Gasoline smell on: September 30, 2010, 06:30:03 AM
Ron:

Sorry I didn't get back to you sooner but I've been away from the computer lately.

I say rebuild the carb, rebuild kits are cheap and it's good to clean things up occasionally.  Also make certain that there are no vacuum leaks before looking for other problems. You can search for vacuum leaks by spraying WD40 at gaskets surfaces and suspected leaks while the engine is idling. If the rpm changes when you spray the WD then you have a leak.  Also do a complete tune up if it hasn't been done lately.

Carburetors are complicated and tough to troubleshoot in a message forum like this but I'm more than happy to share what I can. Stalling when braking can be that the float level is too high. Or maybe a vacuum problem with the brake booster if you have power brakes? 

Clean and rebuld the carb, tune up, and then troubleshoot.

Mike.
35  Camaro Research Group Discussion / General Discussion / Re: parts too good to throw away on: September 24, 2010, 04:12:05 PM
The parts are very usable and looked good on my car last year. I had the body professionally done over last winter and I replaced them because it was cheaper to buy new aftermarket fenders than to pay to have the originals stripped and repaired. I'm not sure that it was the right decision but it is done. I might even hang on to the radiator support because the aftermarket one just sucks compared to the original in the gauge of the steel and the location of all of the holes for mounting things. I'll see what I can do about posting some photos.

Mike.
36  Camaro Research Group Discussion / General Discussion / Re: parts too good to throw away on: September 23, 2010, 12:00:29 PM
I'd also appreciate some guidance on what this stuff is worth. It's all available in aftermarket so I question if it's worth the space that it takes up and may just junk it if I can't find a home for it before the snow flies.

Mike.
37  Camaro Research Group Discussion / General Discussion / parts too good to throw away on: September 23, 2010, 10:27:26 AM
I have a few body parts that I think are too good to throw away but don't have space to store and have no immediate use for. I believe that they are all OEM because they came from my car that I bought in 1987.

Front fender set (weld patches and surface rust)
radiator support (welded patch)
front upper valance (good)
cowl vent (good)
trunk lid (fair)

The fenders and radiator support have surface rust and have weld repair patches but are solid. The trunk has a dent and a little rust in a seam. The valance and vent are nice but need to be stripped.

The parts are in Connecticut for pick up only. Come and see them and make me an offer - I need the space.

Mike.
38  Camaro Research Group Discussion / Restoration / Re: Window felt wiper on: September 21, 2010, 12:14:58 PM
I would tape off the top surface of the panel with blue painters tape and then a layer or two of silver duct tape first. Then remove the back seat and inner trim panel. The glass should be easy to move out of the way. Then try to push the strip up from the inside.  The strip should snap out pretty easily with force in the UP direction. No need to break anything.

-Mark.

Mark - thanks for the reply. That's pretty much how I did it. Once i got in behind the glass I couldn't push them up and out though but I was able to bend the clips and break them off. I also found a place that sold the clips and was able to reuse the wiper.

Mike.
39  Camaro Research Group Discussion / Restoration / Re: Deluxe interior door panel emblem on: September 21, 2010, 12:11:23 PM
For the record...........and OEM deluxe door panel emblem has 9/16" stems and I found a set of aftermarket emblems with 13/16" stems at Lonestar Car Parts in Texas.

Mike.
40  Camaro Research Group Discussion / Restoration / Re: Seat Belt Buckle Coach Emblem? on: September 14, 2010, 06:33:51 AM
There are restoration kits available for 1967 Camaro deluxe seat belts that include the stainless covers and buttons with the carriage emblem. I think that 1967 is the onlt year that used the carriage emblem. Also you must already have 67 deluxe seat belts, these parts won't fit over a standard seat belt.

Mike.
41  Camaro Research Group Discussion / Restoration / Deluxe interior door panel emblem on: September 14, 2010, 06:28:36 AM
I am shopping for new door panel emblems for my 68 deluxe interior.  In my search I've found that I can get exact reproduction parts or repro parts with longer stronger studs. The longer posts are claimed to fit better on repro door panels.

Has anyone seen these parts? Do the new improved parts look original? Any pros or cons either way?

Thanks, Mike.
42  Model Specific Discussions / 6-cylinder Camaros / Re: 250 Fender Emblems on: September 13, 2010, 06:47:10 AM
Do you still have the emblems?

Mike.
43  Camaro Research Group Discussion / Maintenance / Re: flooding engine on: September 09, 2010, 11:52:09 AM
I'm thinking a little permatex non-hardening sealer in there to seal it up and as long as it fits in the hole and is too big to go down into the intake it'll be fine. I'll go get some 7/16" plugs and give it a shot.
Mike.
44  Camaro Research Group Discussion / Maintenance / Re: Gasoline smell on: September 09, 2010, 07:13:53 AM
There's so many things that can cause gas odor that you really are going to have to do some troubleshooting to find the cause.

To oversimplify the problem, gas is escaping the fuel system and you're going to have to find the leak. What makes it difficult sometimes is that it may not be an external leak. It's relatively easy to find an external leak by giving the fuel system a visual inspection from end to end. If that doesn't turn anything up I would look at the carburetor next, especially if it's a quadrajet carb. If gas is leaking internally in the carb you will smell gas just as if  it was leaking on the floor, you just can't see it.

I've been struggling with the same problem with my 67 327 w/quadrajet and am still going through a process of elimination. I smell gas when parking the car hot and then it's hard to start about twenty minutes later. To make a long story short and save a lot of typing I'm pretty much convinced that the gas in the carb is boiling when I park the car with a hot engine. So far I have rebuilt the carb and determined that the float valve is not leaking and replaced the fuel pump to no avail. The next time I remove the carb I plan to install a modified float valve that prevents gas from leaking back to the fuel tank and plug up the exhaust port in the intake manifold under the carb base to keep the carb cooler. I may also tie my heat riser open to help the engine to run cooler.

If you search this forum and the net you'll find loads of information on your problem.

Good luck and have fun with it, Mike.



45  Camaro Research Group Discussion / Maintenance / Re: flooding engine on: September 09, 2010, 06:34:07 AM
tmodel66 - \

Do you remember the diameter of the hole plug? I don't have the carb off the car right now and would like to buy the plugs.

Mike.
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