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Stumbles on Initial Acceleration & Hot #4 Fuse 200 1990

posted by  matt82dl on  Mon Aug 17 08:05 CST 2015
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last visit: Mon Oct 13 10:46 CST 2014
[RELATED]

Hello,

330,000 miles. My 240 lay in wait for my son to turn 16. It doesnt get driven much right now so I decided to take it out and it's developed a stumble on acceleration (righth as you step on the gas) I also noticed fuse #4 was hot to the touch. The in tank pump and sock and sender were replaced ~ 5-6 years ago. I used an AC/Declo pump. Sticking a piece of garden hose a few inches into the fuel filler tube I can hear the in-tank pump running strong. Has well over 1/2 tank of gas in it.

It certainly feels like a fuel delivery problem. I swapped out the fuel relay and no real improvement. Fuel pressure regulator has not been changesd in my 9 years of ownership. Fuel filter is also high on my list... its been ~5 years. I'm going to hook up a line to the fuel return out of the regulator and see if I am getting a good stream. I dont have a fuel pressure gauge.

I really dont want to go into the tank again... even though its only been ~ 5-6 years since i replaced the sender unit and pump, the bung nut and sender are hopelessly rusted so i'd probably be in for a new sender if I try and remove it.
I'm assuming its fuel but could it be vacuum leak?

Look forward to suggestions!

Thanks
Matt





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