Here's a slight mystery lately.
My 87 4Runner 22RE was getting 19-20 mpg (I do mostly highway driving) after a full tuneup. And was getting 16 consistently before the tune, and that was with a loose wire at one plug.
Then the brake lines rusted through and it sat in the garage all winter. I just last week got the gas tank dropped, sanded and painted the frame, replaced fuel main and brake lines, and put it all back together.
It had been sitting for about 5 months (!). Started on the first crank, after about 5 seconds. Nice. And is running like a top, new belts, ps pump flush, fresh oil and filter.
But now, after three tanks run through it, I got 18 on the first one (little low, but not bad), 16.5 on the second, and now 15.5 on the third. WTF?
The tuneup was only a couple thousand miles before the long garage sit.
I'm not hearing suction at the filler cap anymore, so I probably need a new one. But could a leaky cap really cause enough evaporation to drop my mpg this way?
Any ideas?
My 87 4Runner 22RE was getting 19-20 mpg (I do mostly highway driving) after a full tuneup. And was getting 16 consistently before the tune, and that was with a loose wire at one plug.
Then the brake lines rusted through and it sat in the garage all winter. I just last week got the gas tank dropped, sanded and painted the frame, replaced fuel main and brake lines, and put it all back together.
It had been sitting for about 5 months (!). Started on the first crank, after about 5 seconds. Nice. And is running like a top, new belts, ps pump flush, fresh oil and filter.
But now, after three tanks run through it, I got 18 on the first one (little low, but not bad), 16.5 on the second, and now 15.5 on the third. WTF?
The tuneup was only a couple thousand miles before the long garage sit.
I'm not hearing suction at the filler cap anymore, so I probably need a new one. But could a leaky cap really cause enough evaporation to drop my mpg this way?
Any ideas?
