Rough Idle
#1
Guest
Posts: n/a
Hello,
I have a 91 Max SE with 143K on it.
I have recently noticed that the engine is idling roughly and running roughly (though not as noticeable as idling). The rpm at idling is steady, but that's probably electronically controlled. I had a fuel injection cleaning done at the dealer last week with no improvement. I changed the spark plugs too. The distubuter cap, rotor and plug wires are 50 k old.
Any idea what the problem might be?
Thanks.
91 Maxima SE 5-Spd No modifications.
I have a 91 Max SE with 143K on it.
I have recently noticed that the engine is idling roughly and running roughly (though not as noticeable as idling). The rpm at idling is steady, but that's probably electronically controlled. I had a fuel injection cleaning done at the dealer last week with no improvement. I changed the spark plugs too. The distubuter cap, rotor and plug wires are 50 k old.
Any idea what the problem might be?
Thanks.
91 Maxima SE 5-Spd No modifications.
#2
The throttle body and intake manifold is full of carbon that restricts and disrupts the air flow. The build up is due to the oil vapor coming from the PCV system and the hot exhaust gas from the EGR. (The older, and more worn the engine, the bigger the problem.) Since the incoming fuel, from the injectors is way downstream none of the curd gets washed off, and so it builds up. Injector cleaner and a soft brush can remove quite a bit of the build up (particularly the throttle body), but won't get it all. Some shops have a setup to "fog" the intake with a strong solvent that will get more. You can also remove the top of the plenum and scrub it yourself.
Also check for hard/leaky vacum lines.
Also check for hard/leaky vacum lines.
#4
Like brubenstein suggested... check your PCV valve, I just changed mine this weekend... easy... also I've had an ijector replaced before, make sure the fuel is geeting to the engine smoothly first before you consider the injector (not cheap...) check the fuel filter as well. Your gas milage problem might also be related to your O2 sensor... @ $120... good luck.
#5
same problems here
The car vibrates pretty rough when idling at a stop light in drive... I also only get about 210 miles per tank now. Recently I hear this constant clicking noise as I accelerate...thats the most annoying. I just don't know what to do with this car!?!?!
PJ
PJ
#6
speednsounds007
[QUOTE]Originally posted by speednsound007
[B]The car vibrates pretty rough when idling at a stop light in drive... I also only get about 210 miles per tank now. Recently I hear this constant clicking noise as I accelerate...thats the most annoying. I just don't know what to do with this car!?!?!
When was your last oil change? Did you use a factory filter?
[B]The car vibrates pretty rough when idling at a stop light in drive... I also only get about 210 miles per tank now. Recently I hear this constant clicking noise as I accelerate...thats the most annoying. I just don't know what to do with this car!?!?!
When was your last oil change? Did you use a factory filter?
#7
Re: same problems here
Originally posted by speednsound007
The car vibrates pretty rough when idling at a stop light in drive... I also only get about 210 miles per tank now. Recently I hear this constant clicking noise as I accelerate...thats the most annoying. I just don't know what to do with this car!?!?!
PJ
The car vibrates pretty rough when idling at a stop light in drive... I also only get about 210 miles per tank now. Recently I hear this constant clicking noise as I accelerate...thats the most annoying. I just don't know what to do with this car!?!?!
PJ
Dude, I've got the same problem with my 91 SE. I specifically feel the vibration on the steering wheel and only when in "Drive" at a stop light.
So far, I have done the following replacements:
New NGK plugs, Purolator fuel filter and pcv valve, air filter------did not help the vibration.
I also recently changed my oil and put in a Purolator oil filter, with no change in the vibration.
I am really getting nuts without any solution to this problem.
#8
Re: Re: same problems here
Originally posted by superdesi
Dude, I've got the same problem with my 91 SE. I specifically feel the vibration on the steering wheel and only when in "Drive" at a stop light.
So far, I have done the following replacements:
New NGK plugs, Purolator fuel filter and pcv valve, air filter------did not help the vibration.
I also recently changed my oil and put in a Purolator oil filter, with no change in the vibration.
I am really getting nuts without any solution to this problem.
Dude, I've got the same problem with my 91 SE. I specifically feel the vibration on the steering wheel and only when in "Drive" at a stop light.
So far, I have done the following replacements:
New NGK plugs, Purolator fuel filter and pcv valve, air filter------did not help the vibration.
I also recently changed my oil and put in a Purolator oil filter, with no change in the vibration.
I am really getting nuts without any solution to this problem.
#10
Re: Re: same problems here
Originally posted by superdesi
Dude, I've got the same problem with my 91 SE. I specifically feel the vibration on the steering wheel and only when in "Drive" at a stop light.
So far, I have done the following replacements:
New NGK plugs, Purolator fuel filter and pcv valve, air filter------did not help the vibration.
I also recently changed my oil and put in a Purolator oil filter, with no change in the vibration.
I am really getting nuts without any solution to this problem.
Dude, I've got the same problem with my 91 SE. I specifically feel the vibration on the steering wheel and only when in "Drive" at a stop light.
So far, I have done the following replacements:
New NGK plugs, Purolator fuel filter and pcv valve, air filter------did not help the vibration.
I also recently changed my oil and put in a Purolator oil filter, with no change in the vibration.
I am really getting nuts without any solution to this problem.
From what I hear rough idle (especially when at a stop light) is very common with the VG's
![Frown](https://maxima.org/forums/images/smilies/frown.gif)
#11
Guest
Posts: n/a
Well I took the car to the dealer.
They looked at it and said they could not feel a thing.
Either I'm too picky or they don't know much.
In any case, I'm not going to worry about it since the car is running. Period.
I found out that unless the car is really acting up, not just imperfect according to me, there is no sense in taking it to the dealer.
Thanks everyone for the input.
They looked at it and said they could not feel a thing.
Either I'm too picky or they don't know much.
In any case, I'm not going to worry about it since the car is running. Period.
I found out that unless the car is really acting up, not just imperfect according to me, there is no sense in taking it to the dealer.
Thanks everyone for the input.
#12
Originally posted by crsmax
Like brubenstein suggested... check your PCV valve, I just changed mine this weekend... easy... also I've had an ijector replaced before, make sure the fuel is geeting to the engine smoothly first before you consider the injector (not cheap...) check the fuel filter as well. Your gas milage problem might also be related to your O2 sensor... @ $120... good luck.
Like brubenstein suggested... check your PCV valve, I just changed mine this weekend... easy... also I've had an ijector replaced before, make sure the fuel is geeting to the engine smoothly first before you consider the injector (not cheap...) check the fuel filter as well. Your gas milage problem might also be related to your O2 sensor... @ $120... good luck.
#13
Check your ignition coil. You should measure just a couple of ohms on the primary, and 10k ohms on the secondary. I had the same types of problems that I am reading in this thread, and what I found was my secondary measured 10M ohms!!! And get this: the coil-to-distributor wire was open!! The only way this thing was running was the arching that had to be occuring in the wire (Not to mention the bad coil).
Jamie
Jamie
#15
Originally posted by indus
Well I took the car to the dealer.
They looked at it and said they could not feel a thing.
Either I'm too picky or they don't know much.
In any case, I'm not going to worry about it since the car is running. Period.
I found out that unless the car is really acting up, not just imperfect according to me, there is no sense in taking it to the dealer.
Thanks everyone for the input.
Well I took the car to the dealer.
They looked at it and said they could not feel a thing.
Either I'm too picky or they don't know much.
In any case, I'm not going to worry about it since the car is running. Period.
I found out that unless the car is really acting up, not just imperfect according to me, there is no sense in taking it to the dealer.
Thanks everyone for the input.
I kinda agree with you. I have taken my car to my mechanic two times regarding the rough idle, and every time he tells me that there is nothing wrong.
Maybe I am too picky or just obsessing too much about perfection.
#16
Re: Have you checked
Originally posted by MadMaxBrent
I had what I thought was an idle problem but it turned out that 2 of my engine mounts were shagged.
If you have tried everything else, have these looked at.
Brent
I had what I thought was an idle problem but it turned out that 2 of my engine mounts were shagged.
If you have tried everything else, have these looked at.
Brent
It kinda makes sense, but as soon as I raise my RPM the vibration gets lessened.
But I will definately have the mounts looked at during my next appointment.
#18
Re: Injector Ends
Originally posted by indus
Since the injector ends seem to present a problem, I'm going to look at them.
Are they easy to get to? How much dis-assembly does this job require?
Since the injector ends seem to present a problem, I'm going to look at them.
Are they easy to get to? How much dis-assembly does this job require?
Thread
Thread Starter
Forum
Replies
Last Post
litch
4th Generation Maxima (1995-1999)
123
01-04-2024 07:01 PM
Unclejunebug
5th Generation Maxima (2000-2003)
10
04-02-2016 05:42 AM