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Where is the fuel system reset on a 1990 Chrysler New Yorker?

There isn't a single "fuel system reset" button or procedure on a 1990 Chrysler New Yorker like you might find on some modern cars. Fuel system issues in that era are usually addressed by diagnosing and fixing the underlying problem, not by resetting a computer.

If you're experiencing fuel-related problems (e.g., car won't start, rough running, stalling), the issue is likely one of these:

* Bad fuel pump: This requires replacement.

* Clogged fuel filter: This needs replacement.

* Faulty fuel injectors: These may need cleaning or replacing.

* Problems with the fuel pressure regulator: This may need replacement.

* Issues in the ignition system: A weak spark can prevent proper combustion, even if fuel delivery is fine.

* Computer issues (rare): A malfunctioning computer could affect fuel delivery, but this is less common than mechanical problems in a car that old.

What you should do:

1. Check the obvious: Make sure you have gas! Also check for any obvious fuel leaks.

2. Have the car diagnosed: Take it to a mechanic. They have tools and experience to pinpoint the problem accurately. Simply disconnecting the battery for a while (as sometimes suggested for other cars) won't solve a mechanical fuel system problem. It might clear some minor computer glitches, but that's unlikely to be the source of your issue.

In short, there's no fuel system reset button; you need to diagnose and repair the actual mechanical or electrical fault.