Re: I hate my car!!!!!!!!
[Re: Thumperdart]
#1916066
09/20/15 12:39 PM
09/20/15 12:39 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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This is true and those puppy`s shrink up quickly w/todays crap pump fuel. I just did a pair of carbs for a friends quads and the Honda was the worse w/black/brown resin like junk completely plugging the fuel inlet and all of the jets. Took forever to clean em out all because the fuel wasn't drained and they sat for months.....maybe a lesson for those of us who don't drive everyday or even weekly. You might want to pour a cleaner into the tank a couple times a year... when I did testing on this for Chrysler I found that 1 product truly worked.. plenty had alcohol in them but did nothing.. the 1 product that Chrysler went with works... the dealers sell it.. its not cheap but well worth it... Chrysler put its own name on it but it was made by Chemtron.. when I was testing it we had a issue of the fuel in the south west having a lot of sulfur in it and was plugging up the injectors.. I had thousands of warranty injectors to test on... I would get a as is base flow then use the cleaner(I tested over 40 different products) then re-flowed to see what the improvement percentage was... this 1 product was leaps above all the rest.. I could get 98% of the flow back on the injectors.... it also works with carbs.. I know this on my own junk
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Re: I hate my car!!!!!!!!
[Re: MR_P_BODY]
#1916069
09/20/15 12:45 PM
09/20/15 12:45 PM
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Joined: Jul 2004
Posts: 19,318 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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What`s it called Mike.........I heard Stabil works well but never tried it myself.......
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: I hate my car!!!!!!!!
[Re: Thumperdart]
#1916076
09/20/15 12:49 PM
09/20/15 12:49 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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What`s it called Mike.........I heard Stabil works well but never tried it myself....... Mopar Injector Cleaner... in small lettering it says Chemtron on the can(at the bottom) EDIT Stabil is a fuel stabilizer and not a cleaner
Last edited by MR_P_BODY; 09/20/15 12:50 PM.
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Re: I hate my car!!!!!!!!
[Re: BassMan]
#1916569
09/21/15 09:28 AM
09/21/15 09:28 AM
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Joined: Jan 2003
Posts: 10,088 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,088
Frostbitefalls MN (Rocky&Bullw...
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The worn pump well lets fuel seep by the rubber plunger after the carb warms up, as I understand it. I tried everything I could think of to make that carb work, float settings lower, fuel pressure down to 3 1/2 psi, new accelerator pump parts. Nothing worked. A Holley does now though. It is hard to prove that that is the problem for absolute certain, but I had some thoughts on possible repairs. Maybe just a hone with a real fine stone and polish it?
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: I hate my car!!!!!!!!
[Re: gregsdart]
#1916614
09/21/15 11:32 AM
09/21/15 11:32 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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The worn pump well lets fuel seep by the rubber plunger after the carb warms up, as I understand it. I tried everything I could think of to make that carb work, float settings lower, fuel pressure down to 3 1/2 psi, new accelerator pump parts. Nothing worked. A Holley does now though. It is hard to prove that that is the problem for absolute certain, but I had some thoughts on possible repairs. Maybe just a hone with a real fine stone and polish it? If the ID is worn enough that the rubber pump doesnt have enough interference and lets fuel by it...MAYBE a piece of thin wall tubing pressed in to give a smooth wall and a smaller ID... I've never tried it ... if you can find the right size tube... I havent used one of those carbs for years now
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Re: I hate my car!!!!!!!!
[Re: BassMan]
#1916707
09/21/15 02:05 PM
09/21/15 02:05 PM
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Joined: Jan 2003
Posts: 7,526 Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,526
Minnesota
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Start with the basics. Assuming it has solid lifters, check the valve lash. If the valve lash is too tight it can cause problems such as this once the motor warms up. If that's not it, rig up a fuel pressure gauge that you can observe while driving and see what the fuel pressure situation is when the problem occurs. If the fuel pressure is OK, I would bypass the ignition switch to make sure that you don't have an intermittent open circuit there. I just drove my Hemi GTX 2600+ miles on Drag Week, and it does not have Holly's and I had no issues. You don't need Hollies, you need to find the problem. Good luck
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: I hate my car!!!!!!!!
[Re: Thumperdart]
#1916935
09/21/15 07:26 PM
09/21/15 07:26 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I wouldnt bother with the regulator yet... T in a fitting at the carb with a line going to a good gauge... see what it says when your problem happens then make a change IF needed EDIT T in the gauge between the mech pump and the carb.. the rubber hose will be easier
Last edited by MR_P_BODY; 09/21/15 07:31 PM.
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Re: I hate my car!!!!!!!!
[Re: BassMan]
#1916946
09/21/15 07:35 PM
09/21/15 07:35 PM
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Joined: Jan 2003
Posts: 10,088 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,088
Frostbitefalls MN (Rocky&Bullw...
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Everything is stock so it doesn't have a fuel pressure regulator. You can get some fittings and a small gauge to plumb in between the carb and pump to check at idle, then wing it and see how high it goes.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: I hate my car!!!!!!!!
[Re: BassMan]
#1917576
09/22/15 06:51 PM
09/22/15 06:51 PM
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Joined: Jan 2003
Posts: 7,526 Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,526
Minnesota
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Get a vacuum gauge/fuel pressure gauge like this: http://www.ebay.com/itm/VINTAGE-engine-c...=item25adbf6767T it into the fuel line by the carb. Tape it to the outside of the windshield where you can see it, but it can't leak into the cockpit. Drive till the problem occurs, then see it the fuel pressure is excessively low or high. Also, for a different test, hook the gauge to manifold vacuum, and see what it does when the problem occurs. it should be fairly steady, not jumping around. Also, if you can get your hands on an air/fuel ratio meter, like an LM1, you can see it it goes rich or lean when the problem occurs.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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