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#1471
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Year: 2000 1987
Model: Cherokee
Engine: 4.0 2.5
Hesitates when at half throttle for a while, then comes back without position change.
Hey People,
This one has me stumped, anyone ever hear of this?
I have a 1987 Jeep Cherokee 2.5 liter 4 cyl with a throttle body injection system.
When I am driving at about half throttle, the engine hesitates for a second or two, then comes back to life without any change in throttle position.
It doesn't do it when the throttle is floored or when it is coasting with throttle off.
The problem is intermitent and it runs and idles fine the rest of the time.
I have already replaced the tps sensor and have done a full tuneup including the fuel filter.
It seems to get worse when it is hot out.
Any ideas?
This one has me stumped, anyone ever hear of this?
I have a 1987 Jeep Cherokee 2.5 liter 4 cyl with a throttle body injection system.
When I am driving at about half throttle, the engine hesitates for a second or two, then comes back to life without any change in throttle position.
It doesn't do it when the throttle is floored or when it is coasting with throttle off.
The problem is intermitent and it runs and idles fine the rest of the time.
I have already replaced the tps sensor and have done a full tuneup including the fuel filter.
It seems to get worse when it is hot out.
Any ideas?
#1472
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Year: 1988 limited
Model: Cherokee
Engine: 4.0 litre
Hey People,
This one has me stumped, anyone ever hear of this?
I have a 1987 Jeep Cherokee 2.5 liter 4 cyl with a throttle body injection system.
When I am driving at about half throttle, the engine hesitates for a second or two, then comes back to life without any change in throttle position.
It doesn't do it when the throttle is floored or when it is coasting with throttle off.
The problem is intermitent and it runs and idles fine the rest of the time.
I have already replaced the tps sensor and have done a full tuneup including the fuel filter.
It seems to get worse when it is hot out.
Any ideas?
This one has me stumped, anyone ever hear of this?
I have a 1987 Jeep Cherokee 2.5 liter 4 cyl with a throttle body injection system.
When I am driving at about half throttle, the engine hesitates for a second or two, then comes back to life without any change in throttle position.
It doesn't do it when the throttle is floored or when it is coasting with throttle off.
The problem is intermitent and it runs and idles fine the rest of the time.
I have already replaced the tps sensor and have done a full tuneup including the fuel filter.
It seems to get worse when it is hot out.
Any ideas?
#1473
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Join Date: Aug 2010
Location: Calgary, Alberta
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.0L
Okay,
On the passenger side, in the engine compartment, near the top of the firewall... there is a little vacuum thing that has an electrical plug in ... and one of it's two vacuum lines has a green **** that says max 1 psi... I think it goes to the intake manifold... not sure where the other one goes to. BUT all it does is make a clicking sound... and my idle is off when it's cold (idle is too low to stay running). Is it broken? And what exactly does it do? Does it send info to the computer for idle control? please help.
On the passenger side, in the engine compartment, near the top of the firewall... there is a little vacuum thing that has an electrical plug in ... and one of it's two vacuum lines has a green **** that says max 1 psi... I think it goes to the intake manifold... not sure where the other one goes to. BUT all it does is make a clicking sound... and my idle is off when it's cold (idle is too low to stay running). Is it broken? And what exactly does it do? Does it send info to the computer for idle control? please help.
#1474
Member
DJ, I dont know what it is myself. I would get 1 from the bone yard to see if that is the problem . Then buy a new 1 and keep the bone yard 1 handy if you need it on the fly.
#1475
Member
I just went out to look at mine . I dont think my 94 has that thing. It has a vac thing tied into the heater hoses , thats what I thought u were talking about.
#1476
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Location: South Jersey
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Year: 1994
Model: Cherokee
Engine: 4.0
shocks
a friend of my gave me a three inch lift. doesnt have shocks.. does anyone know of what kind of shocks i could put on there?
#1477
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Location: Calgary, Alberta
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.0L
Buelligan, I think that's the problem, not many other years seem to have them, My haynes manual has an illustration of the engine compartment but of course doesn't have the Vac thing. What's really weird is that when I unplug the two prong electrical thing..... nothing changes! Idle is the same (finicky to begin with) all controls work etc. No check engine light even after leaving it for a week. Thanks for looking and yeah, I think I'll go to pick n pull soon to get some spare "if I really need it" parts, good advice!
#1478
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Year: 1998
Model: Cherokee
Engine: 4.0L 190 hp I6
questions about CEL codes, NSS
I'm new here, so forgive me if this is covered elsewhere--I've looked, and found good stuff, but just want to make sure.
Here's the deal: CEL comes on yesterday and AUTOZONE gives me the P0705 code. Most here seem to suggest that this is connected to the NSS (which makes sense, as I've had backup light issues and the heap doesn't seem to be running poorly at all). Here's the questions:
1. How do I know it's the NSS and not the Trans range sensor?
2. How does the NSS being gunked up affect the trans range sensor?
3. If the NSS can't be repaired by cleaning it, anyone ever heard of the "Replacement" brand of NSS? I've found them for very cheap (about $50) as opposed to around $300 at other places. Anyone ever used one of these? Here's a link: http://www.car-stuff.com/carparts/je...+Part+Page%3A1
Any and all suggestions welcome.
Thanks in advance!
Here's the deal: CEL comes on yesterday and AUTOZONE gives me the P0705 code. Most here seem to suggest that this is connected to the NSS (which makes sense, as I've had backup light issues and the heap doesn't seem to be running poorly at all). Here's the questions:
1. How do I know it's the NSS and not the Trans range sensor?
2. How does the NSS being gunked up affect the trans range sensor?
3. If the NSS can't be repaired by cleaning it, anyone ever heard of the "Replacement" brand of NSS? I've found them for very cheap (about $50) as opposed to around $300 at other places. Anyone ever used one of these? Here's a link: http://www.car-stuff.com/carparts/je...+Part+Page%3A1
Any and all suggestions welcome.
Thanks in advance!
#1479
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Year: 2000
Model: Cherokee
Engine: 4.0 Inline 6
im tearing it apart this weekend...should be REAL fun..ive seen pics of the cluster taken apart...is it hard to replace say one of the female connections?....also ive never 'traced' wires for shorts,this will be my first time, i do have a voltometer i bought....gimme a lil play by play if you would
P
P
stefano chim in whenever man
P
#1480
Seasoned Member
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Location: Tucson, Az
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Year: 1995
Model: Cherokee
Engine: inline 6
my jeep NEVER starts on the first try. but always on the second. i think it could be the fuel injectors leaking but not sure. any ideas?
#1481
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Location: West Virginia
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Year: 2000 1987
Model: Cherokee
Engine: 4.0 2.5
#1482
Member
DJ, may be ur jeep is from KALIFORNIA or some state that has high emissions , and that thing is for the emissions or some thing like that.
#1484
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Year: 1988 limited
Model: Cherokee
Engine: 4.0 litre
I'm new here, so forgive me if this is covered elsewhere--I've looked, and found good stuff, but just want to make sure.
Here's the deal: CEL comes on yesterday and AUTOZONE gives me the P0705 code. Most here seem to suggest that this is connected to the NSS (which makes sense, as I've had backup light issues and the heap doesn't seem to be running poorly at all). Here's the questions:
1. How do I know it's the NSS and not the Trans range sensor?
2. How does the NSS being gunked up affect the trans range sensor?
3. If the NSS can't be repaired by cleaning it, anyone ever heard of the "Replacement" brand of NSS? I've found them for very cheap (about $50) as opposed to around $300 at other places. Anyone ever used one of these? Here's a link: http://www.car-stuff.com/carparts/je...+Part+Page%3A1
Any and all suggestions welcome.
Thanks in advance!
Here's the deal: CEL comes on yesterday and AUTOZONE gives me the P0705 code. Most here seem to suggest that this is connected to the NSS (which makes sense, as I've had backup light issues and the heap doesn't seem to be running poorly at all). Here's the questions:
1. How do I know it's the NSS and not the Trans range sensor?
2. How does the NSS being gunked up affect the trans range sensor?
3. If the NSS can't be repaired by cleaning it, anyone ever heard of the "Replacement" brand of NSS? I've found them for very cheap (about $50) as opposed to around $300 at other places. Anyone ever used one of these? Here's a link: http://www.car-stuff.com/carparts/je...+Part+Page%3A1
Any and all suggestions welcome.
Thanks in advance!
#1485
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Year: 1988 limited
Model: Cherokee
Engine: 4.0 litre
Either that or the check valve in the fuel pump. Try the check valve first cuz it's cheaper, buy one in your favourite auto parts shop, it goes on the rubber hose near the tank.