What does it mean when engine barely revs?
Thread Starter
Member
Joined: May 2011
Posts: 127
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Model: Cherokee
What does it mean when engine barely revs?
What does it mean when you take off in the morning and sometimes your jeep barely revs when trying to accelerate? 4.7 Jeep Grand Cherokee Laredo.
Senior Member
Joined: May 2015
Posts: 818
Likes: 35
Year: 1994
Model: Grand Cherokee
Engine: 5.2L Magnum V8 220hp 285ft-lbs
How is the throttle response in neutral?
How quickly does the vehicle slow / stop when not pressing the gas pedal?
Maybe it needs some coffee...
How quickly does the vehicle slow / stop when not pressing the gas pedal?
Maybe it needs some coffee...
CF Veteran
Joined: May 2010
Posts: 1,187
Likes: 33
From: Boston
Year: 2000
Engine: 4.7L
Does it get any warm-up time before "when you take off in the morning"? I let mine run in neutral for ~5 minutes first. Otherwise I'm with Cleman on this one. But maybe there's something you can do about cleaning the TB and IAC before throwing the Benjamins at it. If you do go for a TPS then do yourself a favor and get original equipment.
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 741
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
AH, somebody listens to me! Warming it up in neutral softens those old hard o-rings and allows them to seal before being required to function.
CF Veteran
Joined: May 2010
Posts: 1,187
Likes: 33
From: Boston
Year: 2000
Engine: 4.7L
Yeah Dave, similar to yours, my WJ's PO was/is a snowbird who treated it like a puff. You and I both know that those long periods of sitting stored-away in the garage can be bad for the N-Bunas. Like us, they age and wear better with regular duty. Thanks again for that little gem, for reminding me of it. Anyway, back to this cold engine not revving-up...
Hey Easywolf32! I still want to know what happens after a "proper" warm-up interval.
Hey Easywolf32! I still want to know what happens after a "proper" warm-up interval.