Is it bad for the engine when RPMs dip below 500 for a split second?
Thread Starter
Racer
Joined: Jul 2002
Posts: 303
Likes: 0
From: Sugar Land TX
Is it bad for the engine when RPMs dip below 500 for a split second?
I drive in a heavy freeway traffic on the way to work each morning... drive a few feet, then brake.. drive a few more feet, and so on. I'll step on the gas a little to move that few feet, and the RPM's will drop a little under 500 for a split second after I let off the gas. In that split second, the engine feels like it's about to choke and die, but the RPMs will then pick back up to 500-600 and idles fine. This started happening after installing a torque converter (2800 stall), so the RPMs are a little higher. Is this bad for the engine? Thanks
- Karl
- Karl
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: Is it bad for the engine when RPMs dip below 500 for a split second? (KKu77)
No, it's only inconvenient. If you can, raise your idle. It will keep it from stalling and make the TC feel tighter.
Burning Brakes
Joined: Aug 2002
Posts: 1,045
Likes: 0
From: KC, MO Missouri
Re: Is it bad for the engine when RPMs dip below 500 for a split second? (KKu77)
It can be fixed through tuning. They can step up the IAC recovery idle etc and keep the idle where it is.
Thread Starter
Racer
Joined: Jul 2002
Posts: 303
Likes: 0
From: Sugar Land TX
Re: Is it bad for the engine when RPMs dip below 500 for a split second? (Quick Brick)
It can be fixed through tuning. They can step up the IAC recovery idle etc and keep the idle where it is.
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: Is it bad for the engine when RPMs dip below 500 for a split second? (KKu77)
IAC's will affect your start up when not moving. If you don't want to raise the idle(25 rpm), RAF is what you need to adjust in the 80 and 100 C temps. Raising RAF also controls the "cruise effect" and that may be an unintended consequence. A tuner can do each very quickly and let you decide. I had the same issue when the only mods were TC and gears. I liked the slightly higher idle.
