Went for a drive with the N600's new exhaust this weekend, and I was surprised how 'fumey' the car still was, even inside. Much better, but was still smelling strong gasoline smell inside the car.
Same thing with the Z600, even after the new exhaust.
Is this normal when the cars are running right?
I'm thinking that they are both running quite rich perhaps? I need to pull the plugs and take a look. Probably do need to adjust the carb, but wanted to get some feedback first.
Fumes?
Re: Fumes?
You should not be smelling gas inside the car (or even under the hood). You might try disconnecting the blue wire going to the distributor (so you don't burn the points for this test), remove the air cleaner cover and the air filter, and then turning the ignition switch to the "ign" position. This will let the fuel pump send gas to the carb.
After the carb fuel bowl is full, the clicking on the fuel pump will scale back to about 1 click every 20 seconds or longer. If you hear it clicking more often (i.e. clicking at less than a 5 second interval), check for a fuel leak. Look inside the air cleaner housing and see if gas is appearing. You can also reach into the carb bellows and feel for it (if you find it in this area, the needle and seat in the float bowl area are gunked up and will need cleaning....possibly replacing. Before tearing into the carb, check the fuel pump to see if it is a stock pump and check the pressure. My coupe shop manual specs the pressure at 2 psi which seems low ...... I thought it was about 4 psi). If this is ok, look for a leak along the fuel line (you may be able to see where it is dripping).
good luck,
Dale
After the carb fuel bowl is full, the clicking on the fuel pump will scale back to about 1 click every 20 seconds or longer. If you hear it clicking more often (i.e. clicking at less than a 5 second interval), check for a fuel leak. Look inside the air cleaner housing and see if gas is appearing. You can also reach into the carb bellows and feel for it (if you find it in this area, the needle and seat in the float bowl area are gunked up and will need cleaning....possibly replacing. Before tearing into the carb, check the fuel pump to see if it is a stock pump and check the pressure. My coupe shop manual specs the pressure at 2 psi which seems low ...... I thought it was about 4 psi). If this is ok, look for a leak along the fuel line (you may be able to see where it is dripping).
good luck,
Dale
> Went
> for a drive with the N600's new exhaust this weekend, and I was surprised how > 'fumey' the car still was, even inside. Much better, but was still smelling > strong gasoline smell inside the car.
> Same thing with the Z600, even
> after the new exhaust.
> Is this normal when the cars are running
> right?
> I'm thinking that they are both running quite rich perhaps? I > need to pull the plugs and take a look. Probably do need to adjust the carb, > but wanted to get some feedback first.
Re: Fumes?
Good info Dale.
As for interior gas fumes, take a look at the gas tank ventilation hose. Take the pocket cubby out (plastic bit left side under window, next to the gas pipe) and check to see if the plastic hoses are still connected at the union. If not, replacement hose, and perhaps some shrink tubing to bind it together will seal it. Do not use tape, the fumes will dissolve the adhesive.
A normal car will not have any fumes, gas or exhaust. You need to fix this.
Bruce D.
Santa Clara, CA From:
"goinhm@..." To:
2cylinderhondas@yahoogroups.com Sent:
Mon, March 29, 2010 1:16:29 AM Subject:
Re: [2cylinderhondas] Fumes?
You should not be smelling gas inside the car (or even under the hood). You might try disconnecting the blue wire going to the distributor (so you don't burn the points for this test), remove the air cleaner cover and the air filter, and then turning the ignition switch to the "ign" position. This will let the fuel pump send gas to the carb.
After the carb fuel bowl is full, the clicking on the fuel pump will scale back to about 1 click every 20 seconds or longer. If you hear it clicking more often (i.e. clicking at less than a 5 second interval), check for a fuel leak. Look inside the air cleaner housing and see if gas is appearing. You can also reach into the carb bellows and feel for it (if you find it in this area, the needle and seat in the float bowl area are gunked up and will need cleaning.... possibly replacing. Before tearing into the carb, check the fuel pump to see if it is a stock pump and check the pressure. My coupe shop manual specs the pressure at 2 psi which seems low ...... I thought it was about 4 psi). If this is ok, look for a leak along the fuel line (you may be able to see where it is dripping).
good luck,
Dale
As for interior gas fumes, take a look at the gas tank ventilation hose. Take the pocket cubby out (plastic bit left side under window, next to the gas pipe) and check to see if the plastic hoses are still connected at the union. If not, replacement hose, and perhaps some shrink tubing to bind it together will seal it. Do not use tape, the fumes will dissolve the adhesive.
A normal car will not have any fumes, gas or exhaust. You need to fix this.
Bruce D.
Santa Clara, CA From:
"goinhm@..." To:
2cylinderhondas@yahoogroups.com Sent:
Mon, March 29, 2010 1:16:29 AM Subject:
Re: [2cylinderhondas] Fumes?
You should not be smelling gas inside the car (or even under the hood). You might try disconnecting the blue wire going to the distributor (so you don't burn the points for this test), remove the air cleaner cover and the air filter, and then turning the ignition switch to the "ign" position. This will let the fuel pump send gas to the carb.
After the carb fuel bowl is full, the clicking on the fuel pump will scale back to about 1 click every 20 seconds or longer. If you hear it clicking more often (i.e. clicking at less than a 5 second interval), check for a fuel leak. Look inside the air cleaner housing and see if gas is appearing. You can also reach into the carb bellows and feel for it (if you find it in this area, the needle and seat in the float bowl area are gunked up and will need cleaning.... possibly replacing. Before tearing into the carb, check the fuel pump to see if it is a stock pump and check the pressure. My coupe shop manual specs the pressure at 2 psi which seems low ...... I thought it was about 4 psi). If this is ok, look for a leak along the fuel line (you may be able to see where it is dripping).
good luck,
Dale
> Went
> for a drive with the N600's new exhaust this weekend, and I was surprised how > 'fumey' the car still was, even inside. Much better, but was still smelling > strong gasoline smell inside the car.
> Same thing with the Z600, even
> after the new exhaust.
> Is this normal when the cars are running
> right?
> I'm thinking that they are both running quite rich perhaps? I > need to pull the plugs and take a look. Probably do need to adjust the carb, > but wanted to get some feedback first.
Re: Fumes?
�
Bruce, Dale;
There are other things taking place in the fuel systems these days. Alcohol 15% and more is causing lots of problems. But the Vent hose (#6) in the parts manual picture, is the closest dog to the sled.
The recombined fuels they are pumping into your tank can cause the vent tube to shrink, even crack. If it is like mine, it's hard as a rock. Shrink tube will melt, so will vinyl tubing.
Replacing the line will involve removing the tank. Not all that fun but with a beer or two the job is more palatable. Early Coupes are a real bear as the bolts can be troublesome. Later units have the clips and make the job easier. The tanks are interchangeable and after market clips are cheap. Not that the carb couldn't be the culprit, but I can't remember smelling fuel from the carb while behind the wheel.
Bill
Bruce, Dale;
There are other things taking place in the fuel systems these days. Alcohol 15% and more is causing lots of problems. But the Vent hose (#6) in the parts manual picture, is the closest dog to the sled.
The recombined fuels they are pumping into your tank can cause the vent tube to shrink, even crack. If it is like mine, it's hard as a rock. Shrink tube will melt, so will vinyl tubing.
Replacing the line will involve removing the tank. Not all that fun but with a beer or two the job is more palatable. Early Coupes are a real bear as the bolts can be troublesome. Later units have the clips and make the job easier. The tanks are interchangeable and after market clips are cheap. Not that the carb couldn't be the culprit, but I can't remember smelling fuel from the carb while behind the wheel.
Bill
> -----Original Message-----
> From:
> 2cylinderhondas@yahoogroups.com [mailto:2cylinderhondas@yahoogroups.com] > On > Behalf Of > Bruce Dewing > Sent:
> Monday, March 29, 2010 9:19
> AM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] Fumes?
> Good
> info Dale.
> As for interior gas fumes, take a look at the gas tank
> ventilation hose. Take the pocket cubby out (plastic bit left side under > window, next to the gas pipe) and check to see if the plastic hoses are still > connected at the union. If not, replacement hose, and perhaps some > shrink tubing to bind it together will seal it. Do not use tape, the > fumes will dissolve the adhesive.
> A normal car will not have any
> fumes, gas or exhaust. You need to fix this.
> Bruce D.
> Santa
> Clara, CA
> From:
> "goinhm@aol. com"
>
> To:
> 2cylinderhondas@ yahoogroups. com
> Sent:
> Mon, March 29, 2010 1:16:29
> AM
> Subject:
> Re:
> [2cylinderhondas] Fumes?
> You should not be smelling gas inside the car (or even under the > hood). You might try disconnecting the blue wire going to the > distributor (so you don't burn the points for this test), remove the > air cleaner cover and the air filter, and then turning the > ignition switch to the "ign" position. This will let the fuel pump send > gas to the carb. After the carb fuel bowl is full, the clicking on > the fuel pump will scale back to about 1 click every 20 seconds or > longer. If you hear it clicking more often (i.e. clicking at less than a > 5 second interval), check for a fuel leak. Look inside the air > cleaner housing and see if gas is appearing. You can also reach > into the carb bellows and feel for it (if you find it in this area, the > needle and seat in the float bowl area are gunked up and will need > cleaning.... possibly replacing. Before tearing into the carb, > check the fuel pump to see if it is a stock pump and check the > pressure. My coupe shop manual specs the pressure at 2 > psi which seems low ...... I thought it was about 4 psi). If this > is ok, look for a leak along the fuel line (you may be able to see where > it is dripping).
> good luck,
> Dale
> > Went
> > for a drive with the N600's new exhaust this weekend, and I was surprised > > how 'fumey' the car still was, even inside. Much better, but was still > > smelling strong gasoline smell inside the car.
> > Same thing with the
> > Z600, even after the new exhaust.
> > Is this normal when the cars are
> > running right?
> > I'm thinking that they are both running quite rich
> > perhaps? I need to pull the plugs and take a look. Probably do need to > > adjust the carb, but wanted to get some feedback > > first.
Re: Fumes?
We are running the car without an air cleaner until we get things settled down.
We only get the strong fumes when the car is running.
I'm not aware of any leaks--is not dripping on the ground. Will double-check.
I did disassemble and clean the carbs before we got either car running. On the N600 using N.O.S Honda fuel pump from an old Magna (is very similar to stock pump, and is for a carbuerated setup)... it clicks when filling the bowl and then goes silent--so that is working correctly. On the Z600 was using a facet pump for testing, it also clicked until pressurized and then quieted down.
I will check the fuel vent line and make sure that it is both connected and sealed well. I seem to recall hooking it up, but that it was not very pliable, so it make be cracked.
-k
We only get the strong fumes when the car is running.
I'm not aware of any leaks--is not dripping on the ground. Will double-check.
I did disassemble and clean the carbs before we got either car running. On the N600 using N.O.S Honda fuel pump from an old Magna (is very similar to stock pump, and is for a carbuerated setup)... it clicks when filling the bowl and then goes silent--so that is working correctly. On the Z600 was using a facet pump for testing, it also clicked until pressurized and then quieted down.
I will check the fuel vent line and make sure that it is both connected and sealed well. I seem to recall hooking it up, but that it was not very pliable, so it make be cracked.
-k
--- In
2cylinderhondas@yahoogroups.com
, goinhm@... wrote:
> You should not be smelling gas inside the car (or even under the hood).
> You might try disconnecting the blue wire going to the distributor (so you
> don't burn the points for this test), remove the air cleaner cover and the
> air filter, and then turning the ignition switch to the "ign" position.
> This will let the fuel pump send gas to the carb. After the carb fuel bowl
> is full, the clicking on the fuel pump will scale back to about 1 click
> every 20 seconds or longer. If you hear it clicking more often (i.e.
> clicking at less than a 5 second interval), check for a fuel leak. Look inside
> the air cleaner housing and see if gas is appearing. You can also reach
> into the carb bellows and feel for it (if you find it in this area, the
> needle and seat in the float bowl area are gunked up and will need
> cleaning....possibly replacing. Before tearing into the carb, check the fuel pump to
> see if it is a stock pump and check the pressure. My coupe shop manual
> specs the pressure at 2 psi which seems low ...... I thought it was about 4
> psi). If this is ok, look for a leak along the fuel line (you may be able
> to see where it is dripping).
> good luck,
> Dale
> Went for a drive with the N600's new exhaust this weekend, and I was
> surprised how 'fumey' the car still was, even inside. Much better, but was still
> smelling strong gasoline smell inside the car.
> Same thing with the Z600, even after the new exhaust.
> Is this normal when the cars are running right?
> I'm thinking that they are both running quite rich perhaps? I need to pull
> the plugs and take a look. Probably do need to adjust the carb, but wanted
> to get some feedback first.
Re: Fumes?
I see a lot of posts for the vent hose from the tank. That would be a sure bet for a fuel odor inside the car. But if you are talking about exhaust fumes, then I would take a real close look at the rear hatch seal. Although you may be driving 55 mph down the road, exhaust gasses can "roll" towards the car and in the cabin. Would not hurt to check for any holes, tail light, floor, firewall, etc. If it is raw fuel, and you love your car, stop driving until you find the leak. It is never a good feeling to see the paint start to boil on the hood of your car before watching it burn to the ground! Good luck.
--- In
2cylinderhondas@yahoogroups.com
, "krisd" wrote:
> Went for a drive with the N600's new exhaust this weekend, and I was surprised how 'fumey' the car still was, even inside. Much better, but was still smelling strong gasoline smell inside the car.
> Same thing with the Z600, even after the new exhaust.
> Is this normal when the cars are running right?
> I'm thinking that they are both running quite rich perhaps? I need to pull the plugs and take a look. Probably do need to adjust the carb, but wanted to get some feedback first.
Re: Fumes?
When you set up the float level on your carbs, the info in the sedan shop manual is correct for the older style carbs using the diaphragm. If you are using the later style carb (as found on later sedans and coupes), you can use the info found in the coupe shop manual. The info on page 45 is not quite correct. The metric float measurement is correct but the inches measurement is wrong. It should be 0.807 inches.
Your msg indicated you don't have the air cleaner connected (i.e. the black box holding the air filter). Where are the blowby gases from the valve cover going? If they are going into the engine compartment, you might be smelling these fumes inside the car.
I would check the fuel vent line near the filler cap. For the coupe, you may also want to check the fuel lines going to the fuel filter which is under the rear seat.
Here's the deal. If you sit in the car and it is not running and you don't smell the fumes, then the problem is probably not the vent lines or the fuel tank. If the problem only occurs when the engine is running, then you probably have (a) a leak in your fuel delivery system, (b) a leak in the exhaust system, (c) or you are smelling the blowby gases off the valve cover.
good luck,
Dale
Your msg indicated you don't have the air cleaner connected (i.e. the black box holding the air filter). Where are the blowby gases from the valve cover going? If they are going into the engine compartment, you might be smelling these fumes inside the car.
I would check the fuel vent line near the filler cap. For the coupe, you may also want to check the fuel lines going to the fuel filter which is under the rear seat.
Here's the deal. If you sit in the car and it is not running and you don't smell the fumes, then the problem is probably not the vent lines or the fuel tank. If the problem only occurs when the engine is running, then you probably have (a) a leak in your fuel delivery system, (b) a leak in the exhaust system, (c) or you are smelling the blowby gases off the valve cover.
good luck,
Dale
> I did
> disassemble and clean the carbs before we got either car running. On the N600 > using N.O.S Honda fuel pump from an old Magna (is very similar to stock pump, > and is for a carbuerated setup)... it clicks when filling the bowl and then > goes silent--so that is working correctly. On the Z600 was using a facet pump > for testing, it also clicked until pressurized and then quieted > down.