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power loss while climbing hills
Nissan Automobiles Nissan Automobiles Discussions (alt.autos.nissan)
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#1
 
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power loss while climbing hills -
07-05-2006
, 03:28 PM
#2
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Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks It's an automatic? Sounds to me like it's dropping a gear to get up the |
you were doing 75, and it was happy in the higher gear.
The hard bit is why is it only doing 60 - and on that I have no clue.
Andy
#3
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Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks I would think that your ignition timing is off, but then your motor, I'm |
CD
#4
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naveen.godhala (AT) gmail (DOT) com wrote: Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks I would think that your ignition timing is off, but then your motor, I'm not sure which, is probably completely immune to that. CD |
#5
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Recently the Service Engine Soon light came up. I retreived the diagnostic codes from the vehicle and there was only one code and it was P1135. I looked up on the internet and there are different versions/explanations for the same code. Can someone tell me exactly what the problem might be. The light disappeared after couple of days. And is this something related to the power loss the vehicle experiences while climbing slopes? thanks Codifus wrote: naveen.godhala (AT) gmail (DOT) com wrote: Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks I would think that your ignition timing is off, but then your motor, I'm not sure which, is probably completely immune to that. CD What type of engine is in your car? |
#6
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#7
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naveen.godhala (AT) gmail (DOT) com wrote: Recently the Service Engine Soon light came up. I retreived the diagnostic codes from the vehicle and there was only one code and it was P1135. I looked up on the internet and there are different versions/explanations for the same code. Can someone tell me exactly what the problem might be. The light disappeared after couple of days. And is this something related to the power loss the vehicle experiences while climbing slopes? thanks Codifus wrote: naveen.godhala (AT) gmail (DOT) com wrote: Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks I would think that your ignition timing is off, but then your motor, I'm not sure which, is probably completely immune to that. CD What type of engine is in your car? |
#8
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It's an '01 Pathfinder so it's probably a 3.5L. On an '01 PF with 3.5, P1135 is left side intake valve timing control. Manual or automatic? "Codifus" <codifus (AT) optonline (DOT) net> wrote naveen.godhala (AT) gmail (DOT) com wrote: Recently the Service Engine Soon light came up. I retreived the diagnostic codes from the vehicle and there was only one code and it was P1135. I looked up on the internet and there are different versions/explanations for the same code. Can someone tell me exactly what the problem might be. The light disappeared after couple of days. And is this something related to the power loss the vehicle experiences while climbing slopes? thanks Codifus wrote: naveen.godhala (AT) gmail (DOT) com wrote: Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks I would think that your ignition timing is off, but then your motor, I'm not sure which, is probably completely immune to that. CD What type of engine is in your car? |
#9
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One strong possibility is the knock sensor detecting some pinking on hills and retarding the ignition to stop it, losing power. You probably don't get any pinking on the flat, that's the way pinking works. Try higher grade fuel. |
#10
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Automatic. If thats the problem what shud I do? Chuck Tribolet wrote: It's an '01 Pathfinder so it's probably a 3.5L. On an '01 PF with 3.5, P1135 is left side intake valve timing control. Manual or automatic? "Codifus" <codifus (AT) optonline (DOT) net> wrote naveen.godhala (AT) gmail (DOT) com wrote: Recently the Service Engine Soon light came up. I retreived the diagnostic codes from the vehicle and there was only one code and it was P1135. I looked up on the internet and there are different versions/explanations for the same code. Can someone tell me exactly what the problem might be. The light disappeared after couple of days. And is this something related to the power loss the vehicle experiences while climbing slopes? thanks Codifus wrote: naveen.godhala (AT) gmail (DOT) com wrote: Hello All, I have a 2001 Nissan Pathfinder with 61000 miles. Since last year I am noticing some power loss while driving up the hill. While driving on flat surfaces I dont see any difference.. to drive at 75mph on flat surfaces the engine turns at 3500 RPM and when I start driving up the hill it gradually looses power/rpm and the speed decreases to <60mph even though I donot take my foot off the pedal. Suddenly the RPM shoots to more than 3500 RPM but the vehicle continues to move at <60 mph. Earlier it was not doing that, it would easily climb the slope at 75 mph and never use to go over 3500 RPM. Can some one tell me why it is doing this lately and what could be the problem. On flat surfaces everything works great. thanks I would think that your ignition timing is off, but then your motor, I'm not sure which, is probably completely immune to that. CD What type of engine is in your car? |
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