Why can't I see the GAS
#1
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SHOW GUEST
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Join Date: Feb 2011
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Why can't I see the GAS
I recently put a completely stock 454 into my 4x4. I got it runnin real good and today I jus got it back from the muffler shop and took it for spin. When I was driving it and I got kinda heavy on the throttle it shifted into 2nd and stumbled for a lil bit then came alive. I didnt think much about it at the time til I stopped it did it again. So I got home and popped the hood to see if maybe I had gotten sum water in my gas and thats when i noticed i had almost no gas in my clear in line filter. It would jus shoot a lil in every once in a while even if I rev'd the engine. I installed a new holley manual fuel pump when I installed the engine so I dont think this is the problem. does anyone have any suggestions?
#2
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RACING JUNKIE
Join Date: Sep 2007
Location: Montvale, VA
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I cannot explain it,but those clear filters can be misleading sometimes. I know it seems like they should run absolutely full of fuel,but I have never seen one do it. I know it sounds impossible,but that is just my experience. Can you tell if the stumble was a lean-surge or a rich-bog? Also,ignition issues can closely mimic fuel delivery issues. It can be hard to tell the difference at times. A vacuum leak could be the culprit, as well
#3
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Well I had an old distributer cap and rotor that was burned and old so I installed a new one 3 days ago. When engine is idling it is real smooth like a sewing machine. I couldn't really tell if it was a rich or lean bog but when I opened up the secondaries it sputtered for a second and then took off.
#4
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Coupla things . . first, take that Goddamned clear fuel filter off and pitch it . . All I've ever seen them to be good for was coming apart and setting the engine afire . .
Second . . put a fuel pressure guage on the line between the pump and the Carb and see if you have fuel pressure . . Eliminate the guess work. Chances are, you may have too much of a good thing . . or maybe not. At this point neither of us know . .
Any guessing beyond this point would be a waste of broadband . .
Second . . put a fuel pressure guage on the line between the pump and the Carb and see if you have fuel pressure . . Eliminate the guess work. Chances are, you may have too much of a good thing . . or maybe not. At this point neither of us know . .
Any guessing beyond this point would be a waste of broadband . .
#5
X2 on the filter, chuck it. WITH THE ENGINE OFF, pop the air cleaner, get a flashlight, NOT a lighter, look down the carb throat and work the throttle linkage to see if you have a good stream of fuel during that stroke. If it's a weak stream (us old fogies know all about weak streams :? :wink: ) then it's an accel pump circuit issue. Don't do this more than a couple of times or you'll flood heck out of the engine.
What kinda carb ?
What kinda carb ?
#6
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Join Date: Nov 2008
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Originally Posted by DrivingMissDD
NOT a lighter
#8
what did the MUFFLER SHOP INSTALL???? IF WAS OK BEFORE THEN SOMETHING MIGHT HAVE GOT PINCHED/CUT/ OR UNHOOKED!!
CHECK UNDERNEATH GOOD--DOES IT HAVE A SENSOR ON THE EXHAUST--IS IT OK OR LEAKING ??
CHECK UNDERNEATH GOOD--DOES IT HAVE A SENSOR ON THE EXHAUST--IS IT OK OR LEAKING ??
#9
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The carb is a Edelbrock this being a non performance application i figured it would be sufficient. The guys at the muffler shop installed 2 3inch pipes and Flowmasters from the headers to the back of the tires and no sensors on it. I'll check the fuel dump into the carband get back with yall. I really cant say it was runnin great before cause I dont hav hardly any run time on the engine it was open header so I didnt drive it much at all.