hard time accelerating- q45

so recently ive been noticing that my car doesnt accelerate like it used to... i never really beat on the car but whenever i accelerate and goose the pedal a little bit lately, the car seems to shudder and the car doesnt want to go past 2k rpms.... 

the other day ago, i accelerated and the car started shaking when it got a little past 2k rpms and the check engine light started flashing; the dam thing misfired!  has this happened to anyone before? ive heard so many different things the problem could possibly be: spark plugs,  the coils, the injectors, i dont even know at this point,  getting it checked out by my mechanic soon, but from a q owner to another here, can anyone tell me anything about this mishap?!

thanks,
nick

Anytime a CEL flashes, its misfiring. First things first. Get the codes from the CEL. Usually shops check it free now-a-days but be very wary as the economy has made many shops shady as hell. How many miles do you have on the car (year/make/model)? Hows your transmission fluid? Have you done any work on the car recently just before this occurred? Also how long as your CEL light been on?
 
Next thing is once you get this CEL code(s), please do not always trust what you see on the forums. There are a bunch of wanna-be mechanics who experiment and you may end up spending more than you should. I've had many clients who do this to save money and end up getting the wrong diagnosis. However, if you're going to read the forums, make sure the person who is speaking is qualified to speak in that matter.
 
Feel free to PM once you have the codes or if you have any questions.

Just take it to a shop that knows those q v8 ins and outs... Just be careful of those shops that just throw parts at it..  If its a 95 and under car, its a lil tricky to pull code from those ecu..if obd2.. It should pin point easier if they know how to read datas.. most likely injectors or maf sensor tho from ur problems u discribed..

Sounds like a g50 q45 to me. I have the same damn issue. Does the car shift?

this happened to my 97 q45 about a month after i got it. For me i went to a local shop and got it scanned for free saying i might get the work done here but after getting the codes, which where knock sensors and missfire in #8 cylinder, i went to my trust worthy mechanic. After fixing that car ran back to normal. hope this helps

yea my cars a 97,  got the codes checked:   theres the knock sensor,  misfire on cylinder 2,  and the check engine lights been on for a while but only for an o2 sensor,  the whole misfire thing happend roughly 4 days ago. i also just got a new starter for it,  and theres times when it takes a full second or two to start, even tho i just got a new starter,  so i feel it might b something with the spark plugs....

and as of right now it just hit 169069 miles ;) haha but yeah it shifts just fine, its in the shop as i speak, hopefully its not anything TOO major.

You should be fine if they replace both knock sensors and change spark plugs and repace #2 ignition coil. Also make sure there is no oil leaking in any of the cylinders because it can cause missfires. (happened to me valve covers were leaking but fixed now). Also sorry to break the bad news but once one coil goes out they will eventually all start going out. I got a good deal a while back and i bought all 8 ignition coils just incase it starts misfiring again which it will fursure no doubt. 159,000 miles on mine

[QUOTE=RajahCasti;386468] i went to my trust worthy mechanic. After fixing that car ran back to normal. hope this helps[/QUOTE]
 
 
Who's your mechanic?

thanks for the help,  but shit... how much do all the coils usually cost? im dreading finding out the cost of everything...

Brian at all import service he hooks it up :biggthumpup:

But i usually buy my own parts and give it to them so its way cheaper. Their prices for parts is too much for me

Ignition Coils. FTL.


EDIT: I got mine for about $100 a piece shipped.

I have 8 used in decent shape, there is also a chance it is the valve cover gasket leaking oil in.
 
 That being said I had a long talk with 2 master techs at Infiniti about this and they both say that they have chased this problem on a few Q's with no luck.  It is believed to be partially influenced by the tune of the ECU but there is no proof of this.   G/L

yeah,  i might just need to get the ecu reset, and my valve cover gaskets ARE leaking oil.  think thats the problem, cus i took it to my mechanic, and everything seems to be in good shape,  spark plugs, coils, etc. so later this week,  the q's goin to get new gaskets =)

[QUOTE=NickY33;388326]yeah,  i might just need to get the ecu reset, and my valve cover gaskets ARE leaking oil.  think thats the problem, cus i took it to my mechanic, and everything seems to be in good shape,  spark plugs, coils, etc. so later this week,  the q's goin to get new gaskets =)[/QUOTE]

I KNEW IT. Your gaskets caused this..

From your ill informed question it was hard to pinpoint a direct diagnosis over the internet but I always knew it was your gaskets...

Next time give us a lot more information on where/how and what's exactly happening to your car so maybe just maybe we can help out even tho reading a forum text online is nothing compared to a personal car check-up.

good luck.

i didnt find out about the gaskets till a little while after posting this thread... but got the gaskets fixed and knock sensors replaced, runs like a dream!

just fyi, you dont fix that simple 02 sensor you will eventually destroy your catalytic coverter.then you will have a pretty price tag to pay haha

ohh yea,  i got it fixed, thats the first thing i did

if you dont mind me asking, how much did you get your gasket replaced for?

i paid 400 flat, ive been around to a couple of places and alot of shops usually charge like 450... i think i got a pretty decent deal on it

appreciate the info man.  I got a little leak through the gasket too, but nothing severe at the moment, but thanks again.

no prob!

I'm glad I read this. I just recently picked up a 97 Q that I have noticed is kinda sluggish when accelerating from a dead stop. Thx for the info!

Visit [url]www.rockauto.com[/url]... Found the valvecover gaskets for 27 bucks