|
My viewpoint if of a guy who has "done" 240s for 30 years, but my newest is a 1988. Not a lot of knowledge on the newer ones. Also, "done" cars in general since 1955, learned a lot on how they work. The new stuff (FI, etc.) is just doing the same things with different control systems. Same 4-cycle engine (suck, squeeze, pop, fooey).
If your car will accelerate only very slowly, if you must go easy on the gas pedal and gradually push it further, that is a symptom that the ignition timing, spark advance, is not working right.
Several of the answers allude to that. Bad knock sensor, e.g. That device "hears" a bang in the block and causes the ICM (Ignition Control Module) to retard the spark a little. If the system "hears" constant bangs, it sends so much retard signals that advance doesn't take place.
The ICM itself may be bad, some models worse than others. Other answers point out that such a failure is unusual, not unheard of, though.
Can't recall all the things you have done, did you check the fuel pressure regulator?
The air intake system has possible failures, too. Air entering the intake after the AMM is unmeasured air, and thus makes things happen for which the ICM and ECM will attempt to compensate, making some tests unclear. Too much air = lean mixture = 02 sensor picks that up and tels the ECU to add fuel so you might have a too rich problem. Weird, hunh? Check the plugs for color. Sooty black = rich.
The fat accordion hose can get holes in the bottom side that are hard to see. If it is taped, some holes are covered, maybe there are new ones.
You mentioned a large hose connection that is taped up but shows a split. It is likely a vacuum hose, which can be replaced rather than repaired.
Don't give up, and save the six-pack for a celebration when the BB, and you, get it fixed.
Good Luck,
Bob
:>)
|
