I need to pick your brains
#662865
04/06/10 07:53 PM
04/06/10 07:53 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
OP
top fuel
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OP
top fuel
Joined: Oct 2005
Posts: 1,927
Seaford, Va
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Hey everyone I am having a wierd problem and I hope you can help. I got my new shortblock in about the same time I bought a new 950Hp carb, so it's been a little while getting everything working right. The engine runs fine and the carb seems to run great until it's run for a while. I can drive this thing around for about five miles and it runs fine , but when it runs a little longer than that it acts like it's flooding out to the point of cutting off. I can shut the fuel pump off and it will run fine until it starts to run out of gas. I have changed the fuel pressure, adjusted the float levels and everything I can think of but nothing helps. If I didn't give a acurate enough symptons just ask. Thanks for your help. Joe
6.50 @105.26
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Re: I need to pick your brains
[Re: MR_P_BODY]
#662868
04/06/10 08:36 PM
04/06/10 08:36 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
OP
top fuel
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OP
top fuel
Joined: Oct 2005
Posts: 1,927
Seaford, Va
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Thanks Mr P. I thought that also but the carb don't get that warm. It has a Super Sucker spacer on it also.
Last edited by KINDAFAST; 04/06/10 08:40 PM.
6.50 @105.26
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Re: I need to pick your brains
[Re: VernMotor]
#662869
04/06/10 08:39 PM
04/06/10 08:39 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
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OP
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Joined: Oct 2005
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My son said the same thing about the coil. But why would it run fine as soon as I turned the fuel pump off.
Last edited by KINDAFAST; 04/06/10 08:41 PM.
6.50 @105.26
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Re: I need to pick your brains
[Re: Kindafast]
#662870
04/06/10 08:55 PM
04/06/10 08:55 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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whats your fuel pressure set at? sounds to me you got a stuck needle and seat.
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Re: I need to pick your brains
[Re: Kindafast]
#662872
04/06/10 09:05 PM
04/06/10 09:05 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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Quote:
Thanks Mr P. I thought that also but the carb don't get that warm. It has a Super Sucker spacer on it also.
Ok so its not getting too hot.... it could be coil BUT since you arent shutting the car off just turning the pump off till it starts to stumble(at least thats what I'm guessing your doing) then turning the pump back on.... if this is the case I wouldnt think coil (it didnt have time to cool)... could be a needle expanding and not sealing... that would be a cheap check, try a viton needle... but it would sound like a fuel issue.... but electronics will act weird once heated and go back to normal once cooled, but your not giving it cool time
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Re: I need to pick your brains
[Re: MR_P_BODY]
#662873
04/06/10 09:22 PM
04/06/10 09:22 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
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OP
top fuel
Joined: Oct 2005
Posts: 1,927
Seaford, Va
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Thanks for all the replys. Mr P You are right I don't shut the car off I just shut the fuel pump off and it runs fine until it starts running out of gas. Then I turn the fuel pump on and it fills up the bowls and starts running like poop again. I am open to all possibilities at this point keep them comming.
6.50 @105.26
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Re: I need to pick your brains
[Re: Kindafast]
#662882
04/07/10 10:56 AM
04/07/10 10:56 AM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
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master
Joined: Feb 2007
Posts: 5,080
organ
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what kind of gas are you running? pump gas nowadays will boil at a very low temperature. i had pump gas (ethanol free) boiling at what felt like about 120 degrees! the carb was barely warm, and the gas was boiling violently! car ran like poopy.
for what is the good life if not doing things thoughtfully?
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Re: I need to pick your brains
[Re: maximum entropy]
#662883
04/07/10 04:57 PM
04/07/10 04:57 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
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top fuel
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OP
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Joined: Oct 2005
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Ok I messed with it all day. I did get the carb to duplicate the problem in the garage. I found if I get the engine nice and hot and drop it in gear and stand on the brake to about 2200 rps it will start to shoot fuel from the front vent tube. I can rev it up and it stops and if I let it go back to a idle it will stop. This is driving me crazy. Any more ideas ?
6.50 @105.26
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Re: I need to pick your brains
[Re: Kindafast]
#662884
04/07/10 04:59 PM
04/07/10 04:59 PM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
master
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master
Joined: Feb 2007
Posts: 5,080
organ
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do you have clear sight plugs? if so, see if the fuel is boiling.
for what is the good life if not doing things thoughtfully?
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Re: I need to pick your brains
[Re: maximum entropy]
#662885
04/07/10 05:03 PM
04/07/10 05:03 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
OP
top fuel
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OP
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Joined: Oct 2005
Posts: 1,927
Seaford, Va
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No I don't have the clear ones so I can't check that. I do see a lot of vapors comming out of the vent tubes prior to the gush.
6.50 @105.26
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Re: I need to pick your brains
[Re: Kindafast]
#662887
04/07/10 05:22 PM
04/07/10 05:22 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
No I don't have the clear ones so I can't check that. I do see a lot of vapors comming out of the vent tubes prior to the gush.
Have you changed the needle and seat yet... I would do that first... its cheap... when the fuel gets hot and has any agitation it will put out a pile of vapor and fuel coming in through the needle and seat is plenty of agitation..... if you have a air leak (sucking in air, your fuel pressure will show it also), you can check for one but I doubt you will find one
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Re: I need to pick your brains
[Re: MR_P_BODY]
#662888
04/07/10 05:36 PM
04/07/10 05:36 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
OP
top fuel
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OP
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Joined: Oct 2005
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Seaford, Va
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I am getting a new needle and seat tomorrow and a new float just in case. I sure hope that will fix it. The fuel gauge don't jump around much so I don't think it would have air in it.
6.50 @105.26
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Re: I need to pick your brains
[Re: The Shocker]
#662891
04/07/10 08:29 PM
04/07/10 08:29 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
OP
top fuel
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OP
top fuel
Joined: Oct 2005
Posts: 1,927
Seaford, Va
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Thanks guy's I will give it a try tomorrow when they show up. I will let you know.
6.50 @105.26
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Re: I need to pick your brains
[Re: Kindafast]
#662892
04/08/10 04:40 PM
04/08/10 04:40 PM
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Joined: Oct 2005
Posts: 1,927 Seaford, Va
Kindafast
OP
top fuel
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OP
top fuel
Joined: Oct 2005
Posts: 1,927
Seaford, Va
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Well I got all my new parts today. I put them in and went for a little ride. I still don't know wether it worked or not cause I broke a darn roller rocker. I am not dealing with the old Cat rockers anymore and will just save the money for a good set. So for now the carb is the least of my worries. Thanks again for all the replys. Joe
6.50 @105.26
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