Holley backfiring after cleaning - please help!
Hi all,
I have a 350 SBC with a Holley 600. The motor is in a car that has been stored for 12 years, and the previous owner had turned it over regularly using 2 stroke gas. The car ran really rough and it was suggested that I remove the front of the carb and clean the primary jets etc. I did this, and removed as much of the old gasket as I could and replaed with new. Now when I try to start the car, it won't, backfiring badly. What have I done wrong, or where should I be looking? I don't think the float level was touched, but it may have been knocked during ceaning - would this cause it? I have a rebuild kit on order, but it may be a few weeks away (I am in New Zealand), but have a gasket set bought locally. Any thoughts? Kind regards, Andrew |
Andrew wrote:
> > Hi all, > > I have a 350 SBC with a Holley 600. The motor is in a car that has been > stored for 12 years, and the previous owner had turned it over > regularly using 2 stroke gas. The car ran really rough and it was > suggested that I remove the front of the carb and clean the primary > jets etc. I did this, and removed as much of the old gasket as I could > and replaed with new. Now when I try to start the car, it won't, > backfiring badly. What have I done wrong, or where should I be looking? > I don't think the float level was touched, but it may have been knocked > during ceaning - would this cause it? I have a rebuild kit on order, > but it may be a few weeks away (I am in New Zealand), but have a gasket > set bought locally. Any thoughts? > Well, I can tell you that Holley carbs of that era tend to be very intolerant of backfires. There's a part of the carb called a "power valve" which takes care of enrichment after the accelerator pump shot is consumed. The rubber diaphragm in that valve tends to be easily damaged by as few as one or two backfires out the carb throat. Best bet is to throw an overhaul kit into it. JazzMan -- ************************************************** ******** Please reply to jsavage"at"airmail.net. Curse those darned bulk e-mailers! ************************************************** ******** "Rats and roaches live by competition under the laws of supply and demand. It is the privilege of human beings to live under the laws of justice and mercy." - Wendell Berry ************************************************** ******** |
"Andrew" > wrote in :
> Hi all, > > I have a 350 SBC with a Holley 600. The motor is in a car that has been > stored for 12 years, and the previous owner had turned it over > regularly using 2 stroke gas. The car ran really rough and it was > suggested that I remove the front of the carb and clean the primary > jets etc. I did this, and removed as much of the old gasket as I could > and replaed with new. Now when I try to start the car, it won't, > backfiring badly. What have I done wrong, or where should I be looking? > I don't think the float level was touched, but it may have been knocked > during ceaning - would this cause it? I have a rebuild kit on order, > but it may be a few weeks away (I am in New Zealand), but have a gasket > set bought locally. Any thoughts? > > Kind regards, > > Andrew > > How did you clean the jets? If you poked anything through them besides a shot of carb cleaner...they are most likely toast. -- Anthony You can't 'idiot proof' anything....every time you try, they just make better idiots. Remove sp to reply via email |
great meatballs, is to use very lean meat.
1 lb. ground flesh; human or pork 3 lb. ground beef 1 cup finely chopped onions 7 - 12 cloves garlic 1 cup seasoned bread crumbs ˝ cup milk, 2 eggs Oregano basil salt pepper Italian seasoning, etc. Tomato gravy (see index) Fresh or at least freshly cooked spaghetti or other pasta Mix the ground meats together in a large bowl, then mix each of the other ingredients. Make balls about the size of a baby?s fist (there should be one lying around for reference). Bake at 400°for about 25 minutes - or you could fry them in olive oil. Place the meatballs in the tomato gravy, and simmer for several hours. Serve on spaghetti. Accompany with green salad, garlic bread and red wine. Newborn Parmesan This classic Sicilian cuisine can easily be turned into Eggplant Parmesan If you are planning a vegetarian meal. Or you could just as well use veal - after all, you have to be careful - Sicilians are touchy about their young family members... 6 newborn or v |
Brown the onions, peppers and celery.
Add the meat then season, continue browning. De-glaze with sherry, add the reduced broth. Finally, put in the root vegetables and simmer for 15 minutes. Allow to cool slightly. Place the pie pan in 375 degree oven for a few minutes so bottom crust is not soggy, reduce oven to 325. Fill the pie with stew, place top crust and with a fork, seal the crusts together then poke holes in top. Return to oven and bake for 30 minutes, or until pie crust is golden brown. Sudden Infant Death Soup SIDS: delicious in winter, comparable to old fashioned Beef and Vegetable Soup. Its free, you can sell the crib, baby clothes, toys, stroller... and so easy to procure if such a lucky find is at hand (just pick him up from the crib and he?s good to go)! SIDS victim, cleaned ˝ cup cooking oil Carrots onions broccoli whole cabbage fresh green beans potato turnip celery tomato ˝ stick butter 1 cup cooked pasta (macaroni, shells, etc.) Rem |
white rice.
Pre-mie Pot Pie When working with prematurely delivered newborns (or chicken) use sherry; red wine with beef (buy steak or roast, do not pre-boil). Pie crust (see index) Whole fresh pre-mie; eviscerated, head, hands and feet removed Onions, bell pepper, celery ˝ cup wine Root vegetables of choice (turnips, carrots, potatoes, etc) cubed Make a crust from scratch - or go shamefully to the frozen food section of your favorite grocery and select 2 high quality pie crusts (you will need one for the top also). Boil the prepared delicacy until the meat starts to come off the bones. Remove, de-bone and cube; continue to reduce the broth. Brown the onions, peppers and celery. Add the meat then season, continue browning. De-glaze with sherry, add the reduced broth. Finally, put in the root vegetables and simmer for 15 minutes. Allow to cool slightly. Place the pie pan in 375 degree oven for a few minutes so bottom crust is not soggy, reduce oven to 325. Fill the pie with stew, place top crust and with a fork, seal the crusts together then poke holes in top. Return to oven and bake for 30 minutes, or until pie crust is golden brown. Sudden Infant Death Soup SIDS: delicious in w |
look at the power jet, the one with a diaphraghm.
they go bad in time and especially after some backfires. good luck, sam "Andrew" > wrote in message ... > Hi all, > > I have a 350 SBC with a Holley 600. The motor is in a car that has been > stored for 12 years, and the previous owner had turned it over > regularly using 2 stroke gas. The car ran really rough and it was > suggested that I remove the front of the carb and clean the primary > jets etc. I did this, and removed as much of the old gasket as I could > and replaed with new. Now when I try to start the car, it won't, > backfiring badly. What have I done wrong, or where should I be looking? > I don't think the float level was touched, but it may have been knocked > during ceaning - would this cause it? I have a rebuild kit on order, > but it may be a few weeks away (I am in New Zealand), but have a gasket > set bought locally. Any thoughts? > > Kind regards, > > Andrew > > |
Thanks all for the help (and the recipes...) I'll pull it apart and check
the power valve. The jets et al were cleaned solely with carb cleaner, and the gasket removed as best as possible with carb cleaner and scraping with a piece of plastic. The float level won't be causing the backfire? I am just a bit worried about putting a new PV in and having the same thing happen... "SAMMMMM" > wrote in message ... > look at the power jet, the one with a diaphraghm. > they go bad in time and especially after some backfires. > good luck, sam > > > > "Andrew" > wrote in message ... > > Hi all, > > > > I have a 350 SBC with a Holley 600. The motor is in a car that has been > > stored for 12 years, and the previous owner had turned it over > > regularly using 2 stroke gas. The car ran really rough and it was > > suggested that I remove the front of the carb and clean the primary > > jets etc. I did this, and removed as much of the old gasket as I could > > and replaed with new. Now when I try to start the car, it won't, > > backfiring badly. What have I done wrong, or where should I be looking? > > I don't think the float level was touched, but it may have been knocked > > during ceaning - would this cause it? I have a rebuild kit on order, > > but it may be a few weeks away (I am in New Zealand), but have a gasket > > set bought locally. Any thoughts? > > > > Kind regards, > > > > Andrew > > > > > > |
Andrew wrote:
> > Thanks all for the help (and the recipes...) I'll pull it apart and check > the power valve. The jets et al were cleaned solely with carb cleaner, and > the gasket removed as best as possible with carb cleaner and scraping with a > piece of plastic. The float level won't be causing the backfire? I am just a > bit worried about putting a new PV in and having the same thing happen... Backfires on carb'd cars can happen because the air in the intake tract is "wet" with fuel. If the intake valve is leaking or the spark plug fires while the intake is still open it ignites the intake charge in the manifold and that in turn blows back out the carb. One think that can cause the spark plug to fire prematurely is if that plug wire is next to another one and the spark pulse in one wire induces the adjacent wire to generate spark voltage. That's why it's important to route and separate the plug wires properly. JazzMan -- ************************************************** ******** Please reply to jsavage"at"airmail.net. Curse those darned bulk e-mailers! ************************************************** ******** "Rats and roaches live by competition under the laws of supply and demand. It is the privilege of human beings to live under the laws of justice and mercy." - Wendell Berry ************************************************** ******** |
> > suggested that I remove the front of the carb and clean the primary
> > jets etc. I did this, and removed as much of the old gasket as I could > > and replaed with new. Now when I try to start the car, it won't, > > backfiring badly. What have I done wrong, or where should I be looking? I rebuilt a Holley 4160 years ago and the new gaskets were "almost" identical with the exception of one little hole that was missing in the gasket between the body and the primary metering block. It caused symptoms similar to yours. Is this possibly your problem? |
All times are GMT +1. The time now is 03:55 AM. |
Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
AutoBanter.com