You guys have a great site here and I have gotten a lot of info out of here so far. I was a lurker until we bought a 94 Q45 last week so now I have a few questions hopefully you can advise me on.

1: Sunroof won't open but the motor is running when the button is moved to open. I haven't tried the manual way of opening since I want to make sure I can get that rascal closed again.

2: The left rear window will roll down but not go up. How hard is it to get at the motor and is there anything in particular I should be looking for? Any tricks to popping the door panel off or are there just clips?

3: What is a good manual to buy for this car to maintain it? Haynes and Chilton's manuals aren't the greatest of help as they are too general usually.

4: When it comes to fuel system cleaner, is there any particular brand the does a better job than another?

5: Does a 94 Q need an additional tranny cooler? I read the article about what to look for and wasn't sure if just the 90-93's could use one. 6: The car has a hesitation problem when accelerating so I'm going to first clean out the mass air flow sensor connector as well as the sensor itself.

7: There is also a "clunking" sound coming from the right front wheel area when you swerve the car side to side firmly. I jacked up the car and can't see anything apparent as the wheel bearings spin nicely, the tie rods have no slop and the steering rack is tight. Any ideas?

We really enjoy the car and how nicely it drives, our other cars are a Dodge diesel 4x4 and our beach car, a beat up Escort wagon where the only light that works in the car is the check engine light.

Thanks in advance, Pat Daniels
Modified by CoastyAV8R at 5:59 PM 8/6/2005

Some answers (I'm a pretty new Q owner but I've been a mechanic for years)1: If it doesn't open manually the cables are broken. If it's hard to open manually be VERY CAREFUL that you don't break the cables - in that case it's simply a lubrication issue.

3: Check in the trunk for the factory shop manual. Every car left the factory with one. Otherwise ebay.

4: Nissan/infiniti reccommend BG products. Call Infiniti of Scottsdale.

5: Every car with an auto trans needs one. 7: Check the upper link (the upper control arm). They wear out fast but they usually squeak rather than clunk. Check the tension rod bushing (look for thick sticky goo around the bushing).

I'm happy with mine - as long as you don't over pay they are an absolute Bargain.

I agree with Robert, welcome aboard to our little club here...

1. Agreed with robert, cable is broken. UNfortunately they dont have just the cable, you have ot buy the whole assembly... Kind of a PITA job but you could do it in an afternoon if your really careful... I have a sunroof for sale!

2. I bet your regulator is going and is already partially broken. Dont mess with it, because the other half (that keeps it from falling) may break and youll be left with a window in the bottom of the door. Commonproblem on many cars, not just nissan and infiniti!

3. Email me, I have a service manual I give out to Q45 owners. [email protected]

4. BG44k is the best stuff, ive tried a lot of over the shelf stuff and nothing worked like 44k.. I prefer to use the 44k when im going on a long trip to maximize its effects.. its most effective when you can use a lot of it at one time, if that makes sense.

5. yes

6. Try cleaning things up and let us know if that changes anything

7. Could be bad sway bar bushings... Bottom line, your front suspsneion is SHOT by now and youll want to replace all your rubber bits and pieces! Replace it all, with a new set of tokico blues shocks and youll have a fine riding and driving Q45!

1. Agreed with robert, cable is broken. UNfortunately they dont have just the cable, you have ot buy the whole assembly... Kind of a PITA job but you could do it in an afternoon if your really careful... I have a sunroof for sale!

1. Do you need to remove the sunroof to replace the cables (I suspect you do)

2. I bet your regulator is going and is already partially broken. Dont mess with it, because the other half (that keeps it from falling) may break and youll be left with a window in the bottom of the door. Commonproblem on many cars, not just nissan and infiniti!

3. Email me, I have a service manual I give out to Q45 owners. [email protected]

4. BG44k is the best stuff, ive tried a lot of over the shelf stuff and nothing worked like 44k.. I prefer to use the 44k when im going on a long trip to maximize its effects.. its most effective when you can use a lot of it at one time, if that makes sense.

5. What is a good tranny cooler to one to install?

6. I cleaned and put some dielectric grease in the MAF connector and the car still hesitates so I'm going to clean the MAF itself and see what that does. What would be the next item to look at? Knock sensor? The car got a recent fuel pump. The problem is it seems that if you floor it, the engine hesitates but if you gently apply the throttle, it seems to not

7. I'm putting in on a lift this week to inspect the whole front end and all of it's bushings. I can imagine after 11 years the bushing are probably shot. Are they all press in bushings? What I noticed about the car is it looks an inch or so lower in the front end almost like it was lowered, is this the way the car normally sits or is it a sign of worn components?

Thanks again for all the help. Can somebody explain all the abbreviations to me and the basic purpose of the part.

MAF= Mass air flow sensor ( I got this one)I have seen other ones like TFCU, ECU and others that I can remember right now. WHat the heck are these and what do the control/monitor?

CoastyAV8R wrote:I have seen other ones like TFCU, ECU and others that I can remember right now. WHat the heck are these and what do the control/monitor?

TCU or TCM. Transmission Control Unit/Module.

ECU or ECM. Engine Control Unit/Module.

Z

My drivers rear window had the same problem, my problem was just in the switch on the console. I popped off the panel and cleaned out the contacts for the switch, works fine ever since.

Congrats on your purchase

I just want to add to the BG44k. Stuff rocks. I couldnt believe it.

I have a laundry of stuff to buy and do to the car before I'll call it "good to go" and among is the fuel system additive.

Qship, what difference did you see by adding it to your fuel system? How often do you do it and what ratio do you use?

I cleaned the MAF sensor, the MAF connector and the throttle body, used 2 cans of carb cleaner to get the throttle body completely clean, but what a difference it made. Whatever hesitation the car had before is gone. I'm not sure what had the biggest effect, but truly a HUGE difference. I was fearing replacing the MAF or the knock sensors so I'm relieved.

CoastyAV8R wrote:How often do you do it and what ratio do you use?

The instructions say that a single can of BG44K treats 20 gallons. I think this is too dilute - indeed some cars do not have that large a gas tank anyway!

I used a full can of BG44K poured into my old 1995 Q45 gas tank that is half to two-thirds full - between 10 to 13 gallons or so. That is the same size as my wife's cars gas tank and I use a full can in it occasionally.

You might also consider pouring in the BG44K at a gas station and then add enough gas (you are using premium only, right?) to "stir" it up a bit rather than have it just go to the bottom of the gas tank.

Then, drive it down to near empty before filling again - take a long scenic drive or something!

Once every oil change or every two to three months seems to be the common rate of use.

Z

Thanks SZ. As far as premium fuel goes, yup we are using it. My wife cringed a bit when I told her but after I told her that over the course of year, we are talking about $100-$200 the cringe decreased. I told to put premium in it or it will be back to the Ford Escort wagon with her blimey soul. What's funny is that premium is still cheaper than diesel fuel, which is what I have to put in my truck. I think it 's $2.32 a gallon for premium while diesel is still at $2.35.

CoastyAV8R wrote:Thanks SZ. As far as premium fuel goes, yup we are using it. My wife cringed a bit when I told her but after I told her that over the course of year, we are talking about $100-$200 the cringe decreased.

Exactly true!

By the way, one of the best sources (price and delivery) of BG44K is from a sponsor here: http://www.everythinginfiniti.com. Joe Tesensky there has been looking after us for years!

In fact, just a few days ago, I received two cans of BG44K from him that I had ordered a few days prior to that. He shipped it to me DSL Express (Air) at no extra charge!

Z

BK44 is expensive but nothing works better for my Q! Once every three months is good. You will need a funnel! With a 94 Q you should check the fuel injectors as well, at least the ones you can get to. They can clogg and hesitation is a result. I think every old injector I have ever seen on a Q has some nice black carbon build up.

Cleaning the MAF can make a huge difference. Make sure you clean the airbox and intake hose as well since your there.

Enjoy the forum. There is nothing like it for your Q.

red

I ordered some parts from everythinginfiniti.com yesterday but didn't get any BG.

When I cleaned the MAF and throttle body I hosed out the intake hose and hand dried it and then shop vac'd out the airbox then scrubbed it clean. My wife happen to walk out when I was crankin' the Q after spraying all the carb cleaner in the throttle body and the car was hesitant to start and when it did, it let out a big puff of blue smoke. By the look on her face, I wouldn't say she was impressed. She will be though when she drives it now...

OI remember Q45tech saying that its more effective to use 44k over a full tank of gas than it is to increase the concentration... This is because its more effective over the long run..... Id rather say, run 2 cans in 2 consecutive FULL tanks than put 2 cans in one tank.....

It works better over time.....