Strange Noise from Engine and Feel in Gas Pedal at 55-65MPH - Nissan Xterra Forum
 
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#1 Old 02-22-2013, 10:53 AM
b11dragone
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Strange Noise from Engine and Feel in Gas Pedal at 55-65MPH

Hey you guys I have a quick question. I recently had my timing belt, water pump, valves, head gasket, cap & root, ignition wires, IAC valve, and spark plugs changed in my 2003 Nissan Xterra SE 6cyl non supercharged. The truck runs amazing at all speeds except for in between 55mph-65mph. When I reach these speeds a thumping and crackling sound comes from the engine compartment and I can feel a small push against the gas pedal. Its small and the noise and throttle "thumping" will go away if I go under or over this speed. Do you guys have any idea what could be causing this?
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#2 Old 02-22-2013, 11:41 AM
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Auto or Manual Trans? Is it rpm sensitive? Have you tried standing with the hood open and moving the throttle with your hand to see if any sound changes in the engine?

It could be something like a drivetrain bearing or connection...driveshaft linkages maybe?
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#3 Old 02-22-2013, 01:20 PM
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Possibly? I really don't have the slightest idea what it is. Its an auto, and the noise is not RPM sensitive. If the truck is in park and I am under the hood pressing the throttle the engine is smooth and sounds great through the entire RPM range. The noise and thumping feel in the gas pedal only happen when I am in drive, going in between those speeds. Any faster or slower and both disappear, in fact I did not notice it until I went on the highway. At first it took awhile to start happening when going those speeds, now it happens almost instantaneously.
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#4 Old 02-23-2013, 05:19 AM
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Check your u-joints on the drive shafts. It is likely the problem. I had the same issue and fixed it by replacing the u joints. The u joints part # are not available...they tell you to buy the whole shaft. I replaced mine using the Frontier (same year) u joints.

Good luck.
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#5 Old 02-23-2013, 04:56 PM
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Thanks for your help guys, I am going to look into the u joints. I will let you know how it plays out.
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#6 Old 02-25-2013, 09:47 AM
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i have the same problem, i bought it with 60k now it has like 110k , its a 2wd auto trans,. the little vibration on the gas pedal its like rpm sensitive, i hit the throttle in N and you can hear like the time chain its the problem, the cable of the gas pedal its very short that it transmits that noise-vibration, and more if the gas pedal cable is touching the engine block,. i mean, from the throttle body to the cabin is like 12" long,. will post some pics later..
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#7 Old 02-25-2013, 09:55 AM
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Quote:
Originally Posted by chupakabras View Post
i have the same problem, i bought it with 60k now it has like 110k , its a 2wd auto trans,. the little vibration on the gas pedal its like rpm sensitive, i hit the throttle in N and you can hear like the time chain its the problem, the cable of the gas pedal its very short that it transmits that noise-vibration, and more if the gas pedal cable is touching the engine block,. i mean, from the throttle body to the cabin is like 12" long,. will post some pics later..
Well the engine in your truck (based on your year) does not use a timing chain, rather a timing BELT. YOur vibration could be anything from an engine mount to a failing distributor bearing, which would cause a bad ignition performance.

Bad U-joints/wheel/transmisson bearings would only cause vibration at speed.
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#8 Old 02-25-2013, 10:17 AM
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Quote:
Originally Posted by SamsXE View Post
Well the engine in your truck (based on your year) does not use a timing chain, rather a timing BELT. YOur vibration could be anything from an engine mount to a failing distributor bearing, which would cause a bad ignition performance.

Bad U-joints/wheel/transmisson bearings would only cause vibration at speed.
ohps, the noise sounds like a timing chain, so, no timing chain, belts don't sound like that, it's something else i guess, as i said, that has been since i bought it when it had 60k, i don't have a single problem with ignition performance, so really don't know what it is,

thks man.
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#9 Old 02-25-2013, 11:26 AM
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Most of the time if there is a vibration or slight shake/noise at 55-65 it is a wheel bearing, but they are elusive and can sound like they are coming from anywhere. I had the oddest problem with my Cobalt SS, I checked the breaks, CV's rotated my tires and had an alignment, before I yanked them out, and they didn't turn hard but when I replaced one, it was instantly better. Might be a long shot, and I can be wrong, but it's worth a try if it saves you $$$, jack the car up in the front and try to wobble the wheels back around, if they move its the bearing, spin them, if they grind lightly or make noise (and its not the breaks) its the bearing. Good Luck!

Last edited by CanObeans!; 02-25-2013 at 11:54 AM.
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#10 Old 04-23-2013, 04:54 PM
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hey OP,
just wondering if you found the culprit? I am havig a very similar thing happening at the moment. just at highway speeds. little tapping/ push back in pedal and can hear it as well
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