I hope you guys can help me solve this problem, because I just got out of one and now this one. Anyway, I noticed today while driving rpms and mph are working together. Then I might take my foot off the gas, to let it coast and then lightly press the gas pedal I noticed the tachometer gauge drop down to 1000 rpms and just stick there, regardless if I step on the gas or or slow down. it will speed up, but I can here something holding it back either under the car or in front. Might sound like I'm going up a hill when I'm going on flat roads. If I give it more gas the tach breaks loose and jumps up, or if I come to a stop it will come down and reset itself and work fine. What could be causing this issue? and if I wait on it will it hurt my Jeep.It's a Jeep GC lauredo, 4.7 V8 by the way
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wacky Tachy...
- Thread starter Eddie25
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try driving with your over drive off, my dakota (same trans) doesn't like the over drive unless i'm going 60 mph or above.
Eddie25
Thread starter
Overdrive? I don't know where that is on the Jeep. If you mean the 4x4 I don't drive with that but I will check. It's crazy cause it just woke up today with that, well it might have been there but I noticed it today.
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i believe on that model it is located on the side of the shifter
How old is the battery in it? That generation Grand Cherokee is known for doing a ton of weird stuff when the batteries get weak.
Eddie25
Thread starter
Originally Posted By: mopar_monkey
i believe on that model it is located on the side of the shifter
The only thing I see on the side of the shifter is the 4w drive. I'll take a picture of it and post it so you can see it.
i believe on that model it is located on the side of the shifter
The only thing I see on the side of the shifter is the 4w drive. I'll take a picture of it and post it so you can see it.
Eddie25
Thread starter
Originally Posted By: rslifkin
How old is the battery in it? That generation Grand Cherokee is known for doing a ton of weird stuff when the batteries get weak.
I don't know actually, I've owned it for 7 months bought it used from a Dealership, I hope it is something as simple as a battery, You think a battery would display symptoms like that. I often leave the battery on while the engine is off and never had any trouble, but it wouldn't hurt to check. in between the 7 months I've dropped down a gran in repairs and I still don't feel confident about anything in it. oh yeah the noise I'm referring to sounds like when you're in a lower gear and you've hit the max mph for that gear and the cars letting you know you need to upshift if you want to go faster, like a dragging noise. It only does this when the needle gets stuck.
How old is the battery in it? That generation Grand Cherokee is known for doing a ton of weird stuff when the batteries get weak.
I don't know actually, I've owned it for 7 months bought it used from a Dealership, I hope it is something as simple as a battery, You think a battery would display symptoms like that. I often leave the battery on while the engine is off and never had any trouble, but it wouldn't hurt to check. in between the 7 months I've dropped down a gran in repairs and I still don't feel confident about anything in it. oh yeah the noise I'm referring to sounds like when you're in a lower gear and you've hit the max mph for that gear and the cars letting you know you need to upshift if you want to go faster, like a dragging noise. It only does this when the needle gets stuck.
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on the shift selector does it say
p
n
D with a circle around it
3
if so then d with circle around it is o/d and 3 is no o/d
p
n
D with a circle around it
3
if so then d with circle around it is o/d and 3 is no o/d
Originally Posted By: Eddie25
Originally Posted By: rslifkin
How old is the battery in it? That generation Grand Cherokee is known for doing a ton of weird stuff when the batteries get weak.
I don't know actually, I've owned it for 7 months bought it used from a Dealership, I hope it is something as simple as a battery, You think a battery would display symptoms like that. I often leave the battery on while the engine is off and never had any trouble, but it wouldn't hurt to check. in between the 7 months I've dropped down a gran in repairs and I still don't feel confident about anything in it. oh yeah the noise I'm referring to sounds like when you're in a lower gear and you've hit the max mph for that gear and the cars letting you know you need to upshift if you want to go faster, like a dragging noise. It only does this when the needle gets stuck.
sounds like how my truck acts when below 60 with o/d on, it brings the rpm's to low and put to much load on the engine, just a characteristic of these engine/transmission combos. mine will even "buck" and "surge" slightly.
Originally Posted By: rslifkin
How old is the battery in it? That generation Grand Cherokee is known for doing a ton of weird stuff when the batteries get weak.
I don't know actually, I've owned it for 7 months bought it used from a Dealership, I hope it is something as simple as a battery, You think a battery would display symptoms like that. I often leave the battery on while the engine is off and never had any trouble, but it wouldn't hurt to check. in between the 7 months I've dropped down a gran in repairs and I still don't feel confident about anything in it. oh yeah the noise I'm referring to sounds like when you're in a lower gear and you've hit the max mph for that gear and the cars letting you know you need to upshift if you want to go faster, like a dragging noise. It only does this when the needle gets stuck.
sounds like how my truck acts when below 60 with o/d on, it brings the rpm's to low and put to much load on the engine, just a characteristic of these engine/transmission combos. mine will even "buck" and "surge" slightly.
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Eddie25
Thread starter
Originally Posted By: mopar_monkey
on the shift selector does it say
p
n
D with a circle around it
3
if so then d with circle around it is o/d and 3 is no o/d
P
R
N
D
Are the only selectors on my shifter no D with bubble.
on the shift selector does it say
p
n
D with a circle around it
3
if so then d with circle around it is o/d and 3 is no o/d
P
R
N
D
Are the only selectors on my shifter no D with bubble.
well besides the over drive it could be a tps sensor, this is common on these things and can cause the same symptoms you are describing, turning the o/d off is just one thing to try before replacing parts but your seems to not have an o/d button so on to the next steps.
Eddie25
Thread starter
Yeah already had the tps sensor replaced. Before it it was like a wild stallion, bucking, Jerking, and stalling. It was a while before I thought it wasn't a transmission problem, because the symptoms felt like it.
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