Question about 1988 Oldsmobile Delta 88
I have an 81 cutlass with a stock 90's chevy 350 only major mod before was the edelbrock intake , it had the stock carb before i bought the car like this more than a year ago , iv'e had this problem for a couple of months & everything i've done cant seem to solve it .
Car was running perfect until out of the blue i was trying to get on the highway & it started bogging down when i accelerated to 50 mph , it would also bog out & it would turn off sometimes if i was stopped with the engine on or stuck in traffic for more than 10 minutes & try to accelerate. i was told to change the fuel filter & i did & it still did the same thing , then i was told to change the carb because the carb was messed up , i changed the carb to a new edelbrock 600 cfm performer & regulated it & it still does the same thing , then i was told it could be the location of the electric fuel pump , the electric fuel pump was located on the alternator bracket & i was told the pressure so close to the carb could be flooding out the plugs but the plugs were fine when I checked them , I put them in about 3 weeks ago ,i wanted to change the pump to a manual one but when i was already about to do it , I realized that the manual fuel pump rod hole was sealed off so i moved the electric fuel pump to the back of the car 2 feet from the gas tank, I would look at the new clear filter & it would seem like it was getting small amounts of gas & slowly fill up but it still bogs out & when the car bogs out it looks like there is barely gas in the filter. also recently the gas gauge hasnt been reading right & points to different directs almost every time I turn the car on. also now some times I would be driving through regular traffic & it would idle real low & bog out & would hesitate to accelerate eventually turning off
I am up to my end with the car already because I dont know what else could the problem be
can anyone please help.
If I understand this right, you had this problem, changed the intake and carb, and still have the same problem, virtually unaffected by the new carb and intake.
My first suspect would be the fuel tank, especially if the car sat for a long time before you started driving it AND now you are using modern fuel which has a tendancy to start "cleaning" things. Being an 81 and that this is an intermitant problem and you are also complaining about the gas guage acting funny, I would drain and clean the tank. The sock on the end of the pickup tube could be falling apart or clogged up. If it is in fact breaking up or letting other junk through to the pump, clean and test if not replace the fuel pump. Personally, I would stick with an electric but it needs to be a decent one and not subject to junk coming from the tank, no pump can hold up to that. For a cheap temporary fix to help ID the problem, put another clear filter before the pump to see what's coming from the tank. If you don't want to put out the $$ for a Holley Red Label or equiv pump, make sure that the output is adaquate. Carbs like low pressure, high volume. Cheap pumps try to up the pressure in order to get the necessary volume and don't work well on a carb which relies on a mechanical float to regulate fuel. The regulator you installed will control pressure but do nothing for a lack of fuel volume at the carb which is the first thing I would suspect.
Other things to check out:
I would imagine you have HEI (elecronic ignition) which usually works or it don't so I wouldn't mess with that. I would check the plug wires though. If they are getting grungy, just change em. Otherwise, make sure nothing is loose. Check for a spot where heat or rubbing has worn through a wire, perhaps more than one.
Look around to see if the fuel is getting hot. Did you use a thick gasket under the carb? Is there anywhere around the engine that the fuel line, especially a metal one, could be too close to a major heat source.
Posted on Jul 26, 2009
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Posted on Jan 02, 2017
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