Ever since I had the car about, more prevelent resently when im in gear cruizing like 3rd or 4th gear and 5th and give it alittle punch of gas it feels like the engine is moving alot...like too much...I feel like it may be a sensor thats gone bad maybe the MAF..i dont know...

Its a very hard thing to explain easily

-matt

 

Souds like a worn clutch.

 

moving = motor mounts
reving = clutch

 

I just had a problem with the engine revving when it was in gear but the car wasn't going anywhere. Got the clutch replaced and it works fine now.

1stmax- why in the world do u have your PC specs here?

 

No it not the clutch ACT with not many miles on it...and I did 3 out of the 4 motor mounts with Poly so I guess i have to do that 4th mount...

anyone else...its almost like the gas pedal is really touchy..then i touch it too much and the engine goes crazy

 

bump it to the ttop

 

ACTs **** up maxima trannys so change that...

 

Listen Guys it has Nothing to do with the CLUTCH...it has something to do with the breathing of the engine, or the mounts...

I have no clue what it is...the easiest way to explain it is, Very Touchy Gas Pedal

-matt

 

Clean the throttle body?
Replace the fuel filter?
Check your ignition coils?
Check/lubricate the throttle linkage?
Check the knock sensor?
Check/replace the spark plugs?
Run a bottle of Chevron Techron fuel injector cleaner through the next tank of gas?
Check/retighten all your grounds/battery connections?

Hope this helps.

PS: I once had a Throttle Position Sensor go bad & the behavior was similar to what you described; also, on occasion, my idle would jump up to about 1,700RPM's sitting in traffic, or when I came to a stoplight, the idle would not drop down to less than 1,500-1,700RPM's. Bad TPS was the culprit.

 

I think the problem may be a COIL for certain...whats the way to change them. ?? you buy all 6 and change them or one then see what one is bad ??

-matt

 

do a search for "ignition coil" with my screenname as a search criteria. I detailed how to test ignition coils individually with a multimeter in a thread a while back.

 

I read over those threads and still pretty sceptical cause my car is running fine at idle No Problems with that...I do get a bumpy accelertion at times..hard to explain
KS is New, Plugs a year old, Filter a year old...I dont know what else it could be...

Best way to desribe it now, just had my car out...Bumpy acceleration that smooths out after the engine "catchs up to itself"

-matt

 

bad fuel injectors can cause a sputtering engine that will soound/feel bad one moment but give it some gas and it will be fine again. Would you describe the problem so far as sputtering?

 

yea it could be described as sputtering...

-matt

 

Use the mechanic's stethescope (3' of 1/4" vacuum hose) to diagnose your injectors individually. They should make a uniform clicking noise at idle. If one or more are bad, they will sound different from the others.

 

yea...its more of a sputtering but only till the engine catches up to itself...still its hard to explain

-matt

 

I have to find out what is wrong with my car..

Question for all your 5spd guys....Get into lets say 4th gear at around 40 miles an hour and hit the gas down alittle then back up and down alittle then punch it...Does your engine feel like its rocking alot or solid ??

Im confused...

-matt

 

Rocking. . .badly, but it's not my engine moving, it's the axles slopping around in the worn differential bearings. I'm ordering a remanufactured tranny 2morrow from www.phoenixhardparts.com & getting the swap done asap.

If your "rocking" is accompanied by any sort of gear whine, or clicking, you may have a bearing problem.

 

hmm..now you have me thinking...I think my bearings are fine though

-matt

 

If the tranny's ok, the other thing that could cause a "rocking" feeling would be damaged engine/tranny mounts.

 

KWheelzSB- do not buy a tranny from phoenix hard parts, they have ripped off two .orgers and many others there is a thread in the general forum about this i believe.

http://www.phoenixhardpartssucks.com/

check out this link

 

I can explain something similar to what matty is talking about. You are in 3rd at say 3k rpm, you shift into fourth at about 2.5k rpm and the car starts to transfer power. Abruptly the car will nose down a bit with a loss of power to the wheels. In the next say 3-5 seconds it will do this anywhere from 6-10 times (decreasing in severity each time) depending on your rpm drop, load, etc, untill it finally smoothes out.
To back up what kwheelzsb said about the axles… About 3 weeks after this problem showed up in my car my dif died. I can move the axles, on the transverse, way too much. Another symptom of this, as I have found by this same problem occuring 35k miles ago, is right when your dif is about to strip itself apart, you will hear a clunking noise when the wheel load is transferred to the dif. This is very complicated to identify because it seams irregular until you can put your finger on the whole system. As it worsens you get a regular clunking as the half shaft makes each full revolution, or more often as it slips.
From the posts I have read in the last few days this seams to be a surfacing problem in 5spds. (Unless it is my imagination.) If not I say a moderator should post a sticky notice to people and save them the trouble of taking it into the stealership to get fixed. The only thing that comes of that is another $2k bill 30k miles later. Based on quite a few of the people who have had this problem, and my own, I would say that a nissan mechanic is unable to measure. It isn’t THAT hard to measure for the needed shims. I am replacing the bearings myself this time and there is a great article at http://www.motorvate.ca/mvp.php if you happen to decide to do it yourself. Don’t let this problem go untreated. The last time I ignored it I stipped all the ring gear out of my dif and trany.
I hope all that crap you just read had some validity to this thread.
God bless,
dan

 

So your calling it the Differntial Carrier bearings are at fault ?? I brought my car to a trans shop, I have no axle play at all...none to warrent a rebuild

-matt

 

Well, it was more of an idea. Being it was something similar to what you described I shot my .02 worth. I was trying to be descriptive enough to where you could discern whether that was your problem or not.
It would really help if you would describe how often the engine moves when it occurs. It is perfectly normal to fell the engine torque when you punch the gas or shift. You will not only "feel" it move just sitting there but if you stick your had on the gear shift you will feel it move a good 1/4 inch. There is a torsion bar from the engine assembly to the shift unit so that the shift unit will torque with the engine. Don't know if that helps either.
God bless,
dan

 

well it does help alittle bit more...the amount of times the engine "moves" all depends on how much gas i punch into the engine, and I do feel it alot in the shifter..and how much my foot moves back and forth..If I wanted to i could punch it down and up for how ever long i wanted to...not that im going to. cause it sounds terrible..I really think its a 5spd thing and that with the amount of work done I have, its normal
on my moms jetta 5spd its prevelant alittle bit but not alot cause there isnt alot of power being put down..on the pizza delivery truck 5spd it doenst happen at all but then again there isnt alot of power being put down
I also have to put into consideration I have a Flywheel

My buddies 95 Maxima with a rebuilt trans does it just as bad...

another brief description is, driving threw traffic in 5th say at 50...luggin the engine kinda and you have move out of the way of a truck...punch it too much and the engine cant keep up so it "rocks" back and forth till it catchs up...kinda hard to explain

-matt

 

My car does the same thing. I really "feel it in the shifter" as well. (Now, that is a statement that could be misunderstood! :-) ) I believe weak/bad/sloppy motor mounts cause the rocking that we feel in the shifter. The shifter rocks most noticeably when right on the verge of costing - small throttle motion causes the engine to rock and, thus, the shifter too. More pronounced acceleration or deceleration produces less shifter movement.

I'm not too concerned, and being too lazy to do anything about it right now, means I'll just live with it.

Paul W.