My Q is sick. Help!

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louiegz
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Well I was out last night doing highway driving and after some hard acceleration, my Q was hesitating. I figured it was because I’m due for a tune up. This was happening before, not only that, I don’t do too much highway driving. This morning I was driving to work, city driving and I was taking it easy, the Q was hesitating big time. It almost seemed like it was going to stall. Any opinions on what it could be? I’m taking my car home at lunch and get my other car until I can get some service. This is a shocker because my Q has been running so well lately, not only that, with all the money I spent on the suspension, brakes, and fuel pump, the last thing I needed was to spend some more money on the Q.


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Rex
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Did you do the fuel filter when you did the pump?

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louiegz
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Rex wrote:Did you do the fuel filter when you did the pump?
Yes I did.

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BIONICQ45
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My Q did that for months. I replaced the fuel filter, cleaned the IAC valve and replaced the MAF. It got better but wasn't fixed. She quit running one day in mid-commute and come to find out my plugs were garbage and one had lost an electrode. I need new NGK plugs (the ones that were in there were autozone specials I guess), a new #7 coil and a new pre-cat (it had melted).

I hope you are running OEM NGKs. If not, put em in Chief!

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elwesso
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OOO OOOO! I have plugs!!! :D

Is your idle smooth?

Need4Speed
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Hey Wes....I'm in need of some plugs....let me know a price.

Thanks,

Andy [email protected]

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louiegz
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BIONICQ45 wrote:My Q did that for months. I replaced the fuel filter, cleaned the IAC valve and replaced the MAF. It got better but wasn't fixed. She quit running one day in mid-commute and come to find out my plugs were garbage and one had lost an electrode. I need new NGK plugs (the ones that were in there were autozone specials I guess), a new #7 coil and a new pre-cat (it had melted).

I hope you are running OEM NGKs. If not, put em in Chief!


Might just be the plugs. My 95Q has 70000miles with the original plugs. I'm due for 60000mile service so this might be the ticket. I will be taking my car in for service next week. It just sucks because I just did all this other work and I hate to part with my money. Old cars always has something to be done.

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BIONICQ45
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louiegz wrote:Might just be the plugs. My 95Q has 70000miles with the original plugs. I'm due for 60000mile service so this might be the ticket. I will be taking my car in for service next week. It just sucks because I just did all this other work and I hate to part with my money. Old cars always has something to be done.


I know what you mean but if it is the plugs and you procrastinate you will be freed of more precious greenery than you would otherwise. You are better off than I was if you are absolutely sure that they are the ORIGINAL plugs and not cheap autolite or other crappy plugs.

It happened to me at 79000 miles and the crappy plugs were put in by the previous owner at around 60000. The turd-plugs (autolite) only lasted for 19000 miles (less than that considering their condition upon removal).

Here is a link of what went down http://www.nissaninfiniticlub....30813

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louiegz
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BIONICQ45 wrote: You are better off than I was if you are absolutely sure that they are the ORIGINAL plugs and not cheap autolite or other crappy plugs.


Yea, I'm sure they're the original plugs. The car has only had 2 owners, my father got it brand new, and I got it from him with less that 30000miles on it. Lets see what the dealer says. I'm taking it in on Tuesday and I wont drive the Q til that day. I hope it makes it OK. When I drove the Q back home at lunchtime, I see it starts acting up about 10 minutes into diving it. The dealer is 30min away. I'll cross my fingers and drive slow.

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BIONICQ45
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I know this is elementary but I would check the MAF connections also. Major hesitation culprit.

nuQ
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i second BIONIC's recommendation,,,,,,check the MAF first!!!!!! with car running wiggle the connection. see if the rpm's jump. take apart, CAREFULLY clean the brass connections (i used a small pin to scrape them down a little,,,again, CAREFULLY, then wiped on some bulb grease. easy. my Q was doing the same thing as yours and this cleared it up instantly!!!!good luck

Clipboard
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FWIW, after a high-speed (no it wasn't!) run my Q felt like it was running on 4 cylinders - it was! An ingintion component had failed and the failure mode was to go to half spark. I'll try to dig up the records to see what it was.john

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Note that the maintenance schedule specifies 60,000 miles or 48 months which ever comes first.....just like oil 3,750 miles or 90 days.

My 4th set of oem plugs were recently installed and after 3.5 years and 59,000 miles they were not pristine. Far from it.

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redmanfx
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louiegz was your car hesitating at a certain RPM or not? Mine occasionaly acts up on me. The other day I was passing someone on the hwy and hit about 90 mph and Wooaah... 0 RPM and It just about died on me. Warning light came on and I had to limp home not being able to go over 3000 RPM again. Next day everything is fine. I'm changing the airbox, spark plugs and cleaning the throttle body and MAF today. I'm also going to check the CAS while I'm at it. I'm baffled. No noise from the fuel pump anymore either.

red

I can't pull out the ECU either because the thing is stuck in there good.

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louiegz
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I will check the MAF connections today. So, remember that I'm the idiot, novice mechanic, so I will ask stupid questions. How should I clean the MAF? What do I use?

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redmanfx
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I used throttle body cleaner, seafoam deep creep and a tooth brush for the screen and inside tube being carefull not to get the element wet with it. My friend brought me rubbing alcohol for the element itself. He swore that was the best thing for the element. I'd let one of these guru's answer about the actual cleaning of the inside element since they've done it more than me.

red

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elwesso
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Brake parts cleaner is the best, as you dont want to touch ANYTHING to the MAF element... Just the mist of the aerosol will clean it good enough...

nuQ
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that's all i did,,,spraying the brake cleaner in the MAF, cleaning up the connections,,,,,problem solved!

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elwesso
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I cleaned my MAF today, not the connector the element. Used NAPA TB cleaner, and I swear it idles smoother!

Damn time for a new air filter!!!!!!


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