I have noticed twice now when coasting down a hill and I have my foot on the gas just very lightly, I can feel the car surging. The RPMs go up and down by about 300 RPM. I have cleaned the MAF, and the throttle body. It does not happen all the time. I tried searching but just found people saying they had high RPMs not an up and down one like me.

 

If its an automatic it might be your torque converter

 

I think it is fuel / spark related. One time it did I had a misfire immediately after the weird rpm for a few seconds

 

you have a leak in your gasoline delivery system. Get it checked by a certified Nissan service center.

 

This...

That leak can be extremely dangerous. Same thing happened to my friend's brand new Frontier he only had for 6 months. The muthrfckr burned like a demon in hell at a major intersection while he was waiting for the light to turn green.

 

No smell of gasoline. I think a gas leak is somewhat far fetched. I would guess a failing sensor first. If I had fuel leaking enough to start starving the engine I am sure I would see or smell it.

 

hmm sounds like a serious problem.

have you tried disconnecting your right foot and shoving it directly in your mouth?

 

WTF who are you talking to?

 

yo mama

 

Why are you even bothering to post. How about growing up and finding something else better to do than try to act like a tough guy in front of your computer. Go find somewhere else to troll.

 

If you don't smell gas, that's good. That means the leak isn't coming into the engine. Maybe it's from below and leaking into the ground?


Do the RPMS jump a lot when you press further down on the gas pedal? If so, then the problem may related to the throttle positioning.

 

how about you learn what a throttle pedal is for

 

I have been under the car and there is not any fuel leaking. It only happens when the throttle is barely being pressed and even then it is not all the time. Steeping on the gas harder makes it smooth out and drive like normal. If I take my foot off the gas it idles like normal.
This guy must be on crack or something. No idea what his deal is.

 

if i push the button on the dash that looks like a red triangle all of my blinkers start flashing. is this normal? why would i want to turn left and right at the same time?

 

If you're gonna quote, please make sure your answer is not in what you're quoting. It just confuses us, ok? edit...I see you fixed it. Great. Thanks

Do the rpms go DOWN while your foot is still on the gas? Or only up? They should only go UP when the gas pedal is pressed

 

it means your car is doing the blinker self-check. Find an assistant to verify all the turn signals are signaling at the proper intervals.

 

ok going to recap:

Going down hill with the gas pedal slightly depressed the RPMS surge up and down by about 300 RPM repeatedly

Stepping on the gas clears this up and car accelerates smoothly

Taking foot off the throttle makes it idle down and idle like normal.

 

ill clear this all up for you mmkay

that big thing in your driveway, parking lot, street, whatever you have you know the thing with 4 round things in each corner? thats called a car. it has pedals, lights, shifters and even a wheel!! when you push the long skinny pedal down the car makes a funny vvvrroooooomm sound and it goes faster


THIS IS NORMAL

 

So what's the issue sounds like operator error

 

Push the throttle all the way in, if the rpms increase by 5000rpm, then that means that your Throttle Position Sensor is not working properly. Go to autozone and tell them that every time you push the gas pedal, the car wants to go faster.

 

 

I am holding the throttle steady and the RPMS are going up and down

 

That's not what you originally said...

 

So people thought I was posting a thread saying every time I press the gas the rpms go up?

 

 

Didn't think I needed to spell that out

 

Nissans aren't like Honda's that have an erratic idle if you do look fora vaccume leak

 

I tried check for a vacuum leak as well. I sprayed carb cleaner all around the intake and vacuum lines

 

Did you happen to spray any in your face?

 

ok **** this thread and all the ******** in here

 

honestly dude what did you expect

 

I didn't say when I press the gas the rpms keep going up. I said while lightly pressing the gas the RPMs surge. If people weren't sure what I was saying the adult thing to do would be to ask. Not post completely rude and ****head posts.

 

 

 

Thanks for clearing that up. It all makes perfect sense now.

This might be your problem right here...





So in your particular situation, try cleaning the gas pedal.

Of course, there is this golden rule to follow...

 

i cant stop laughing

 

 

I raise and call...

 

Sounds like a small vacuum leak. Happened to me when I was buttoning the manifold up on a DE-k swap. It was small enough to not affect driveability, but surge during light throttle.

 

Sounds to me like the TPS may have a spot burned out causing it to bounce around. Does it surge if you give it that same amount throttle from a complete stop or only when slowing down?

I'm surprised how everyone is being a douche bag on here. It's been a while since I've been on the org and can't believe the admins even tolerate **** like this.. especially from Paul.. Paul I'm gonna go tell your wife you're being an ******* online again!