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Thanks, Art.
Today I checked the fuel pressure regulator. I took out the vacuum hose and tried to smell for gas. There was only a brief smell of gas and no more. It was clean.
Just to recap what happened, last year around this time, it stopped on highway. I had it towed to the mechanic. Mechanic replaced a few things, one of which may be ignition coil. Then he determined the ECU was dead. I went to the junk yard and picked one ECU.
Then the car was working but was not running well, making noise. I took it to the mechanic a few weeks later. He determined that noise was coming from intake manifold. So he replaced the intake manifold gasket (4) and one below (header gasket?). The car was much better but still not powerful enough. (Still not exactly healthy engine sound at idle.)He mentioned that he may have to adjust timing. He also said cause may be dirty fuel filter, etc.
It was not that bad. so I kept driving. It is drivable except when it goes up the hill, it gets weak. When I used the 3rd gear (i.e. no overdrive), the car seemed burdened and does not accelerate much. Still the car manages San Francisco hills but barely.
Two weeks ago, I replaced the fuel filter, which was really dirty. It did not improve condition, however.
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