My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
start when the engine is cold; it turns over fine, but takes too long for the
engine to start. Once running, it emits gassy fumes out of the exhaust side-
pipes that make your clothes smell like gasoline while the top is off.

I had a carb specialist try to adjust the carb, but it didn't help. The carb
is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The motor
has a street cam and headers.

I was told that Edelbrock carbs do not work well with 304's, and to get a
Holley Avenger truck carb with an electric choke. Before I drop the cash on a
Holley, I would appreciate some advise to this problem.

 

Without knowing what size carb, choke or no choke, and which manifold, it is
hard to tell you what the problem could be. What I can tell you is that
Edelbrock and Holley carbs are both set up from the factory with a general
tune. This mean the carb may or may not need to be set up properly for your
particular engine. In general, the Edelbrock carbs run too rich with the
factory set up. Normally they will require a metering rod change, and maybe
a jet change as well. You also don't specify the cam specs. When you say
"street cam" that really doesn't tell anyone the specifics of your cam. The
manifold cam also be a factor. Is it single or dual plane? Does it have the
heat crossover to warm the engine properly?

The last thing is, I like some of the features of the Avenger truck carbs,
but a 300 cubic inch engine doesn't need a 670CFM carb. If they make a
smaller version now, it would be cool, but again, you're probably going to
have to do some jet and power valve changes to get the engine running the
way it should. Remember, they call these carbs universal for a reason.

Chris

"Skyjacker" <u26190@uwe> wrote in message news:65d820af401df@uwe...
> My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
> start when the engine is cold; it turns over fine, but takes too long for
> the
> engine to start. Once running, it emits gassy fumes out of the exhaust
> side-
> pipes that make your clothes smell like gasoline while the top is off.
>
> I had a carb specialist try to adjust the carb, but it didn't help. The
> carb
> is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The
> motor
> has a street cam and headers.
>
> I was told that Edelbrock carbs do not work well with 304's, and to get a
> Holley Avenger truck carb with an electric choke. Before I drop the cash
> on a
> Holley, I would appreciate some advise to this problem.
>

 

Without knowing what size carb, choke or no choke, and which manifold, it is
hard to tell you what the problem could be. What I can tell you is that
Edelbrock and Holley carbs are both set up from the factory with a general
tune. This mean the carb may or may not need to be set up properly for your
particular engine. In general, the Edelbrock carbs run too rich with the
factory set up. Normally they will require a metering rod change, and maybe
a jet change as well. You also don't specify the cam specs. When you say
"street cam" that really doesn't tell anyone the specifics of your cam. The
manifold cam also be a factor. Is it single or dual plane? Does it have the
heat crossover to warm the engine properly?

The last thing is, I like some of the features of the Avenger truck carbs,
but a 300 cubic inch engine doesn't need a 670CFM carb. If they make a
smaller version now, it would be cool, but again, you're probably going to
have to do some jet and power valve changes to get the engine running the
way it should. Remember, they call these carbs universal for a reason.

Chris

"Skyjacker" <u26190@uwe> wrote in message news:65d820af401df@uwe...
> My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
> start when the engine is cold; it turns over fine, but takes too long for
> the
> engine to start. Once running, it emits gassy fumes out of the exhaust
> side-
> pipes that make your clothes smell like gasoline while the top is off.
>
> I had a carb specialist try to adjust the carb, but it didn't help. The
> carb
> is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The
> motor
> has a street cam and headers.
>
> I was told that Edelbrock carbs do not work well with 304's, and to get a
> Holley Avenger truck carb with an electric choke. Before I drop the cash
> on a
> Holley, I would appreciate some advise to this problem.
>

 

Without knowing what size carb, choke or no choke, and which manifold, it is
hard to tell you what the problem could be. What I can tell you is that
Edelbrock and Holley carbs are both set up from the factory with a general
tune. This mean the carb may or may not need to be set up properly for your
particular engine. In general, the Edelbrock carbs run too rich with the
factory set up. Normally they will require a metering rod change, and maybe
a jet change as well. You also don't specify the cam specs. When you say
"street cam" that really doesn't tell anyone the specifics of your cam. The
manifold cam also be a factor. Is it single or dual plane? Does it have the
heat crossover to warm the engine properly?

The last thing is, I like some of the features of the Avenger truck carbs,
but a 300 cubic inch engine doesn't need a 670CFM carb. If they make a
smaller version now, it would be cool, but again, you're probably going to
have to do some jet and power valve changes to get the engine running the
way it should. Remember, they call these carbs universal for a reason.

Chris

"Skyjacker" <u26190@uwe> wrote in message news:65d820af401df@uwe...
> My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
> start when the engine is cold; it turns over fine, but takes too long for
> the
> engine to start. Once running, it emits gassy fumes out of the exhaust
> side-
> pipes that make your clothes smell like gasoline while the top is off.
>
> I had a carb specialist try to adjust the carb, but it didn't help. The
> carb
> is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The
> motor
> has a street cam and headers.
>
> I was told that Edelbrock carbs do not work well with 304's, and to get a
> Holley Avenger truck carb with an electric choke. Before I drop the cash
> on a
> Holley, I would appreciate some advise to this problem.
>

 

To start, you will 'always' have the gas smell in your clothes from side
pipes, that is why they are not street legal in lots (most) of places.
The gas smell comes with a whole bunch of carbon monoxide as well, which
is deadly.

The exhaust pipes need to exit the body at the back corners on about a
30 to 45 degree angle to be safe and not as smelly.

As you have them, the exhaust vortexes under the wheel well which fills
the cab up. Really dangerous if you have a top or doors on.

The cold start issues can simply be a matter of having the gas filter in
upside down. The filter has 2 outlets. The center outlet goes to the
carb and the 'top' outlet goes to the return line. If the return line
outlet isn't at the top, then gas will syphon back to the tank creating
a vapor lock as it sits.

The return lines primary purpose is to prevent vapor lock after a hot
shutdown also.

A pinhole leak in the suction pipe from the pump to the tank can also
cause cold start issues. It can just let air in when it sits. You can
usually see a stain on the line (usually near a frame clip) or rubber
hose where the leak is.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Skyjacker wrote:
>
> My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
> start when the engine is cold; it turns over fine, but takes too long for the
> engine to start. Once running, it emits gassy fumes out of the exhaust side-
> pipes that make your clothes smell like gasoline while the top is off.
>
> I had a carb specialist try to adjust the carb, but it didn't help. The carb
> is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The motor
> has a street cam and headers.
>
> I was told that Edelbrock carbs do not work well with 304's, and to get a
> Holley Avenger truck carb with an electric choke. Before I drop the cash on a
> Holley, I would appreciate some advise to this problem.

 

To start, you will 'always' have the gas smell in your clothes from side
pipes, that is why they are not street legal in lots (most) of places.
The gas smell comes with a whole bunch of carbon monoxide as well, which
is deadly.

The exhaust pipes need to exit the body at the back corners on about a
30 to 45 degree angle to be safe and not as smelly.

As you have them, the exhaust vortexes under the wheel well which fills
the cab up. Really dangerous if you have a top or doors on.

The cold start issues can simply be a matter of having the gas filter in
upside down. The filter has 2 outlets. The center outlet goes to the
carb and the 'top' outlet goes to the return line. If the return line
outlet isn't at the top, then gas will syphon back to the tank creating
a vapor lock as it sits.

The return lines primary purpose is to prevent vapor lock after a hot
shutdown also.

A pinhole leak in the suction pipe from the pump to the tank can also
cause cold start issues. It can just let air in when it sits. You can
usually see a stain on the line (usually near a frame clip) or rubber
hose where the leak is.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Skyjacker wrote:
>
> My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
> start when the engine is cold; it turns over fine, but takes too long for the
> engine to start. Once running, it emits gassy fumes out of the exhaust side-
> pipes that make your clothes smell like gasoline while the top is off.
>
> I had a carb specialist try to adjust the carb, but it didn't help. The carb
> is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The motor
> has a street cam and headers.
>
> I was told that Edelbrock carbs do not work well with 304's, and to get a
> Holley Avenger truck carb with an electric choke. Before I drop the cash on a
> Holley, I would appreciate some advise to this problem.

 

To start, you will 'always' have the gas smell in your clothes from side
pipes, that is why they are not street legal in lots (most) of places.
The gas smell comes with a whole bunch of carbon monoxide as well, which
is deadly.

The exhaust pipes need to exit the body at the back corners on about a
30 to 45 degree angle to be safe and not as smelly.

As you have them, the exhaust vortexes under the wheel well which fills
the cab up. Really dangerous if you have a top or doors on.

The cold start issues can simply be a matter of having the gas filter in
upside down. The filter has 2 outlets. The center outlet goes to the
carb and the 'top' outlet goes to the return line. If the return line
outlet isn't at the top, then gas will syphon back to the tank creating
a vapor lock as it sits.

The return lines primary purpose is to prevent vapor lock after a hot
shutdown also.

A pinhole leak in the suction pipe from the pump to the tank can also
cause cold start issues. It can just let air in when it sits. You can
usually see a stain on the line (usually near a frame clip) or rubber
hose where the leak is.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Skyjacker wrote:
>
> My '79 CJ-5 304 seems to have fuel related problems. It is difficult to
> start when the engine is cold; it turns over fine, but takes too long for the
> engine to start. Once running, it emits gassy fumes out of the exhaust side-
> pipes that make your clothes smell like gasoline while the top is off.
>
> I had a carb specialist try to adjust the carb, but it didn't help. The carb
> is an Edelbrock 4-barrel mounted on an Edelbrock hi-rise manifold. The motor
> has a street cam and headers.
>
> I was told that Edelbrock carbs do not work well with 304's, and to get a
> Holley Avenger truck carb with an electric choke. Before I drop the cash on a
> Holley, I would appreciate some advise to this problem.

 

Any idea if the Edelbrock 600cfm 1405 Performer + Edelbrock 2131 manifold
will require a metering or jet change on a stock 360 '91 Grand Wagoneer ?


Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ
"c" <c@me.org> wrote in message
news:cliLg.1294$d72.56@tornado.rdc-kc.rr.com...
> Without knowing what size carb, choke or no choke, and which manifold, it
is
> hard to tell you what the problem could be. What I can tell you is that
> Edelbrock and Holley carbs are both set up from the factory with a general
> tune. This mean the carb may or may not need to be set up properly for
your
> particular engine. In general, the Edelbrock carbs run too rich with the
> factory set up. Normally they will require a metering rod change, and
maybe
> a jet change as well. You also don't specify the cam specs.

 

Any idea if the Edelbrock 600cfm 1405 Performer + Edelbrock 2131 manifold
will require a metering or jet change on a stock 360 '91 Grand Wagoneer ?


Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ
"c" <c@me.org> wrote in message
news:cliLg.1294$d72.56@tornado.rdc-kc.rr.com...
> Without knowing what size carb, choke or no choke, and which manifold, it
is
> hard to tell you what the problem could be. What I can tell you is that
> Edelbrock and Holley carbs are both set up from the factory with a general
> tune. This mean the carb may or may not need to be set up properly for
your
> particular engine. In general, the Edelbrock carbs run too rich with the
> factory set up. Normally they will require a metering rod change, and
maybe
> a jet change as well. You also don't specify the cam specs.

 

Any idea if the Edelbrock 600cfm 1405 Performer + Edelbrock 2131 manifold
will require a metering or jet change on a stock 360 '91 Grand Wagoneer ?


Dave Milne, Scotland
'91 Grand Wagoneer, '99 TJ
"c" <c@me.org> wrote in message
news:cliLg.1294$d72.56@tornado.rdc-kc.rr.com...
> Without knowing what size carb, choke or no choke, and which manifold, it
is
> hard to tell you what the problem could be. What I can tell you is that
> Edelbrock and Holley carbs are both set up from the factory with a general
> tune. This mean the carb may or may not need to be set up properly for
your
> particular engine. In general, the Edelbrock carbs run too rich with the
> factory set up. Normally they will require a metering rod change, and
maybe
> a jet change as well. You also don't specify the cam specs.