Erratic RPM
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Senior Member
Joined: Aug 2018
Posts: 240
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From: Des Moines, Iowa
Erratic RPM
Started yesterday...when warm, the RPMs will become wildly erratic, bouncing up and and down a thousand or more and ultimately stalling...I may have displaced a vacuum hose while I was underneath bypassing the oil cooler so I will check them. Is that a likely cause, or something else I should be looking at?
thanks!!
thanks!!
Veteran Member
Joined: Mar 2007
Posts: 9,137
Likes: 2,659
From: Florida
yes, also check all the connections from the front of the air intake "trumpet" to the intake manifold "butterfly", particularly the 90 degree elbow connecting to the intake.
also the small hoses under the fuel rail, some can separate themselves from the nipples.
and if none of that gets it, may be time to replace the O2 Sensor.
also the small hoses under the fuel rail, some can separate themselves from the nipples.
and if none of that gets it, may be time to replace the O2 Sensor.
Veteran Member
Joined: Mar 2008
Posts: 25,529
Likes: 11,721
From: Pacific Northwest USA
I agree that the air intake ducting is a good (and easy!) place to begin.
To clarify, this problem occurred only after your other work? if so, then yes, retrace your steps and look for anything amiss, including elderly wires that might've been disturbed.
Cheers
DD
To clarify, this problem occurred only after your other work? if so, then yes, retrace your steps and look for anything amiss, including elderly wires that might've been disturbed.
Cheers
DD
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