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hesitation unknown
Good morning. Well, I posted here a few weeks ago with an unknown issue
that I thought might be the transmission. It was diagnosed by those here and a tranny shop as other issues. At the recommendation of the shop, I replaced cap/rotor, I had just done plugs and wires and skipped those for now. At the advice of this group, I replaced the fuel filter, that seemed to have done the trick. Now my problem is back. I'll describe it as I did before, at highway speeds only, I get a hesitation. It feels like all the power just drops out of the engine. I get no spike up or down in oil pressure, voltage, rpm or temp. I have no check engine lights flashing or staying on and no other idiot lights showing. What I feel is something like pulling a trailer with electric brakes that all of a sudden start pulsing. It only happens at highway speeds and typically only after 20-30 minutes of driving. Any thoughts?? I did check the ground strap and see no rust/decay/fraying. Thanks. |
Re: hesitation unknown
A plugged up air filter on the gas tank vent will cause symptoms like
that. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's "JeffD." wrote: > > Good morning. Well, I posted here a few weeks ago with an unknown issue > that I thought might be the transmission. It was diagnosed by those here > and a tranny shop as other issues. At the recommendation of the shop, I > replaced cap/rotor, I had just done plugs and wires and skipped those > for now. At the advice of this group, I replaced the fuel filter, that > seemed to have done the trick. Now my problem is back. > > I'll describe it as I did before, at highway speeds only, I get a > hesitation. It feels like all the power just drops out of the engine. I > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > check engine lights flashing or staying on and no other idiot lights > showing. What I feel is something like pulling a trailer with electric > brakes that all of a sudden start pulsing. It only happens at highway > speeds and typically only after 20-30 minutes of driving. > > Any thoughts?? I did check the ground strap and see no > rust/decay/fraying. > > Thanks. |
Re: hesitation unknown
A plugged up air filter on the gas tank vent will cause symptoms like
that. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's "JeffD." wrote: > > Good morning. Well, I posted here a few weeks ago with an unknown issue > that I thought might be the transmission. It was diagnosed by those here > and a tranny shop as other issues. At the recommendation of the shop, I > replaced cap/rotor, I had just done plugs and wires and skipped those > for now. At the advice of this group, I replaced the fuel filter, that > seemed to have done the trick. Now my problem is back. > > I'll describe it as I did before, at highway speeds only, I get a > hesitation. It feels like all the power just drops out of the engine. I > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > check engine lights flashing or staying on and no other idiot lights > showing. What I feel is something like pulling a trailer with electric > brakes that all of a sudden start pulsing. It only happens at highway > speeds and typically only after 20-30 minutes of driving. > > Any thoughts?? I did check the ground strap and see no > rust/decay/fraying. > > Thanks. |
Re: hesitation unknown
A plugged up air filter on the gas tank vent will cause symptoms like
that. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's "JeffD." wrote: > > Good morning. Well, I posted here a few weeks ago with an unknown issue > that I thought might be the transmission. It was diagnosed by those here > and a tranny shop as other issues. At the recommendation of the shop, I > replaced cap/rotor, I had just done plugs and wires and skipped those > for now. At the advice of this group, I replaced the fuel filter, that > seemed to have done the trick. Now my problem is back. > > I'll describe it as I did before, at highway speeds only, I get a > hesitation. It feels like all the power just drops out of the engine. I > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > check engine lights flashing or staying on and no other idiot lights > showing. What I feel is something like pulling a trailer with electric > brakes that all of a sudden start pulsing. It only happens at highway > speeds and typically only after 20-30 minutes of driving. > > Any thoughts?? I did check the ground strap and see no > rust/decay/fraying. > > Thanks. |
Re: hesitation unknown
A plugged up air filter on the gas tank vent will cause symptoms like
that. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's "JeffD." wrote: > > Good morning. Well, I posted here a few weeks ago with an unknown issue > that I thought might be the transmission. It was diagnosed by those here > and a tranny shop as other issues. At the recommendation of the shop, I > replaced cap/rotor, I had just done plugs and wires and skipped those > for now. At the advice of this group, I replaced the fuel filter, that > seemed to have done the trick. Now my problem is back. > > I'll describe it as I did before, at highway speeds only, I get a > hesitation. It feels like all the power just drops out of the engine. I > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > check engine lights flashing or staying on and no other idiot lights > showing. What I feel is something like pulling a trailer with electric > brakes that all of a sudden start pulsing. It only happens at highway > speeds and typically only after 20-30 minutes of driving. > > Any thoughts?? I did check the ground strap and see no > rust/decay/fraying. > > Thanks. |
Re: hesitation unknown
In article <408BC90E.D0821744@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote: > A plugged up air filter on the gas tank vent will cause symptoms like > that. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > "JeffD." wrote: > > > > Good morning. Well, I posted here a few weeks ago with an unknown issue > > that I thought might be the transmission. It was diagnosed by those here > > and a tranny shop as other issues. At the recommendation of the shop, I > > replaced cap/rotor, I had just done plugs and wires and skipped those > > for now. At the advice of this group, I replaced the fuel filter, that > > seemed to have done the trick. Now my problem is back. > > > > I'll describe it as I did before, at highway speeds only, I get a > > hesitation. It feels like all the power just drops out of the engine. I > > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > > check engine lights flashing or staying on and no other idiot lights > > showing. What I feel is something like pulling a trailer with electric > > brakes that all of a sudden start pulsing. It only happens at highway > > speeds and typically only after 20-30 minutes of driving. > > > > Any thoughts?? I did check the ground strap and see no > > rust/decay/fraying. > > > > Thanks. OK, that kind of makes some sense. Another issue, not described makes this seem even more likely. When I remove the cap to fill the tank, I often get a lengthy vapor pressure discharge. Where is the air filter for the vent hose? |
Re: hesitation unknown
In article <408BC90E.D0821744@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote: > A plugged up air filter on the gas tank vent will cause symptoms like > that. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > "JeffD." wrote: > > > > Good morning. Well, I posted here a few weeks ago with an unknown issue > > that I thought might be the transmission. It was diagnosed by those here > > and a tranny shop as other issues. At the recommendation of the shop, I > > replaced cap/rotor, I had just done plugs and wires and skipped those > > for now. At the advice of this group, I replaced the fuel filter, that > > seemed to have done the trick. Now my problem is back. > > > > I'll describe it as I did before, at highway speeds only, I get a > > hesitation. It feels like all the power just drops out of the engine. I > > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > > check engine lights flashing or staying on and no other idiot lights > > showing. What I feel is something like pulling a trailer with electric > > brakes that all of a sudden start pulsing. It only happens at highway > > speeds and typically only after 20-30 minutes of driving. > > > > Any thoughts?? I did check the ground strap and see no > > rust/decay/fraying. > > > > Thanks. OK, that kind of makes some sense. Another issue, not described makes this seem even more likely. When I remove the cap to fill the tank, I often get a lengthy vapor pressure discharge. Where is the air filter for the vent hose? |
Re: hesitation unknown
In article <408BC90E.D0821744@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote: > A plugged up air filter on the gas tank vent will cause symptoms like > that. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > "JeffD." wrote: > > > > Good morning. Well, I posted here a few weeks ago with an unknown issue > > that I thought might be the transmission. It was diagnosed by those here > > and a tranny shop as other issues. At the recommendation of the shop, I > > replaced cap/rotor, I had just done plugs and wires and skipped those > > for now. At the advice of this group, I replaced the fuel filter, that > > seemed to have done the trick. Now my problem is back. > > > > I'll describe it as I did before, at highway speeds only, I get a > > hesitation. It feels like all the power just drops out of the engine. I > > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > > check engine lights flashing or staying on and no other idiot lights > > showing. What I feel is something like pulling a trailer with electric > > brakes that all of a sudden start pulsing. It only happens at highway > > speeds and typically only after 20-30 minutes of driving. > > > > Any thoughts?? I did check the ground strap and see no > > rust/decay/fraying. > > > > Thanks. OK, that kind of makes some sense. Another issue, not described makes this seem even more likely. When I remove the cap to fill the tank, I often get a lengthy vapor pressure discharge. Where is the air filter for the vent hose? |
Re: hesitation unknown
In article <408BC90E.D0821744@sympatico.ca>,
Mike Romain <romainm@sympatico.ca> wrote: > A plugged up air filter on the gas tank vent will cause symptoms like > that. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's > > "JeffD." wrote: > > > > Good morning. Well, I posted here a few weeks ago with an unknown issue > > that I thought might be the transmission. It was diagnosed by those here > > and a tranny shop as other issues. At the recommendation of the shop, I > > replaced cap/rotor, I had just done plugs and wires and skipped those > > for now. At the advice of this group, I replaced the fuel filter, that > > seemed to have done the trick. Now my problem is back. > > > > I'll describe it as I did before, at highway speeds only, I get a > > hesitation. It feels like all the power just drops out of the engine. I > > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > > check engine lights flashing or staying on and no other idiot lights > > showing. What I feel is something like pulling a trailer with electric > > brakes that all of a sudden start pulsing. It only happens at highway > > speeds and typically only after 20-30 minutes of driving. > > > > Any thoughts?? I did check the ground strap and see no > > rust/decay/fraying. > > > > Thanks. OK, that kind of makes some sense. Another issue, not described makes this seem even more likely. When I remove the cap to fill the tank, I often get a lengthy vapor pressure discharge. Where is the air filter for the vent hose? |
Re: hesitation unknown
"JeffD." wrote:
> > In article <408BC90E.D0821744@sympatico.ca>, > Mike Romain <romainm@sympatico.ca> wrote: > > > A plugged up air filter on the gas tank vent will cause symptoms like > > that. > > > > Mike > > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > > 88 Cherokee 235 BFG AT's > > > > "JeffD." wrote: > > > > > > Good morning. Well, I posted here a few weeks ago with an unknown issue > > > that I thought might be the transmission. It was diagnosed by those here > > > and a tranny shop as other issues. At the recommendation of the shop, I > > > replaced cap/rotor, I had just done plugs and wires and skipped those > > > for now. At the advice of this group, I replaced the fuel filter, that > > > seemed to have done the trick. Now my problem is back. > > > > > > I'll describe it as I did before, at highway speeds only, I get a > > > hesitation. It feels like all the power just drops out of the engine. I > > > get no spike up or down in oil pressure, voltage, rpm or temp. I have no > > > check engine lights flashing or staying on and no other idiot lights > > > showing. What I feel is something like pulling a trailer with electric > > > brakes that all of a sudden start pulsing. It only happens at highway > > > speeds and typically only after 20-30 minutes of driving. > > > > > > Any thoughts?? I did check the ground strap and see no > > > rust/decay/fraying. > > > > > > Thanks. > > OK, that kind of makes some sense. Another issue, not described makes > this seem even more likely. When I remove the cap to fill the tank, I > often get a lengthy vapor pressure discharge. Where is the air filter > for the vent hose? It is under the hood and is on the bottom of the charcoal canister. The canister looks like a coffee can with tubes out the top. It is a $2.00 filter and is a real pain to change. The canister doesn't come apart so the filter has to be dug out. The second one is easy though... Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's |
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