94 4.6 L computer problems

[Mafils]

Got my brothers car a few m,onths ago and he said it always had computer problems.

Supposedly it would jerk at stop signs so he got the RPMS lowered and it fixed the solution.

However, during the winter it makes it much harder to start the car and get it warmed up.

What I've been doing is holding the gas to manually set the RPMS around 800 for about 5-6 minutes while warming it up.

Is it worth it to get it reverted back to higher RPMS?

While driving it is usually around 550-600 and if I put on air conditioner or heater it goes straight to 500 and makes a sound when i'm at a red light or something.

:/

[Mafils]

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