F53 Loses Power on Rough Roads

[wynnd]

My 2007 Fleetwood Terra has just started some odd behavior - on especially rough roads (construction, etc.), the yellow ABS light will illuminate and engine power drops off for a second or two. Afterwards (couple of seconds), like nothing happened (ABS light off, engine normal). The engine never shuts off, just drop in RPMs, then back to normal. Next big bump, same thing.

Two recent items completed that could be involved - Bigfoot leveling system installed at Quadra Mfg in White Pigeon, MI, and replacement of a front drive sider brake line.

Any advice appreciated on where to start looking....

[wynnd]

Thanks all!

Will report back later this week on findings....

Update: found loose positive battery terminal on chassis battery...problem solved.

[DrewE]

rgatijnet1 wrote:
Check for a loose connection on something that might actually be shutting off the ignition momentarily which is causing your RPM drop.
The ABS light probably is not related to the engine issue but could be from a loose sensor connection at one of your wheels.

If the computer is losing power, the light could well be illuminating for the self-test/bulb test, similar to how it does when the key is first turned on. I'd guess they're both caused by the same loose connection.

[rgatijnet1]

Check for a loose connection on something that might actually be shutting off the ignition momentarily which is causing your RPM drop.
The ABS light probably is not related to the engine issue but could be from a loose sensor connection at one of your wheels.

[carringb]

^Yup. Loose connection somewhere. Battery terminal is likely based on recent work done, but a loose ground strap can cause the same symptoms.

[theoldwizard1]

MountainAir05 wrote:
Check the battery connectors.

Also check all power and ground connections. One is loose and droping out.

[MountainAir05]

Check the battery connectors.

Engine is not normal if it drops RPM. Fuel or air for that if not just a electrical connection for the tach.