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87’ 2.9 rough shake when starting to accelerate

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Old Apr 25, 2025
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87’ 2.9 rough shake when starting to accelerate

Hello all, I recently purchased a 1987 ranger with the 2.6l v6. It had been sitting for over 10 years when I bought it but I changed all of the spark plugs and put some fuel stabilizer and it started right up! Or so I thought…

As soon as it started up it started to shake really bad when idling, I thought it might have been a misfire due to a clogged injector so put cleaner through the system and it seems to help a little but that wasn’t the biggest issue. Whenever I put my foot on the accelerator the transition between the low idle and it reving causes a horrible shake and I don’t know quite why.

and help would be very appreciated!
 
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Old Apr 25, 2025
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From: PSL FL
10 year old fuel. Drain it all and add fresh fuel.
 
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Old Apr 25, 2025
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I have replaced all the fuel with high grade, and I cleaned the system with chevron
 
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