1992 Infiniti Q45 with problems

[pyro2134]

ok so I paid $2000 for this q45, Great ride 3rpms at 120, but when I shut off the car and go in the house all my interior lights keep flickering, im pulling my hair out the bat's got no juice all the time.
Also I cant find any service manuals for the 92 only 94 and up.

It needs paint was sitting for 2 years before I bought it other than the lights it had 3 holes in the power steering line paid $225 for a new one/ $18 for low beam drivers side.

Im looking for a new seal for the sun roof, the control is busted as well so a new one will be needed.

In short I need help fast it rains way to much for the sunroof to leak so lets start there

[pyro2134]

great news my pasenger door window is now off track as well, could realy use a manual thanks in advance for the help.

[qship96]

"3rpms at 120".......obviously you have never been near 120 mph in this car


sounds like you bought somebody elses problems for $2000.......plan on spending $3000-5000 not including paint/cosmetics to return vehicle to proper operating conditions then $2000-3000 every year after that to maintain.....

[elwesso]

no offense but it kinda sounds like a parts car to me... no way that car was worth $2000 in that shape...

Anyway the light issue could be a door switch or something, do they flicker on and off when you drive the car?

The only way your going to fix the sunroof is to replace it with a whole new assembly. Since its stuck closed, your best bet is going to get some black RTV and seal it up that way...

[pyro2134]

"3rpms at 120".......obviously you have never been near 120 mph in this car


sounds like you bought somebody elses problems for $2000.......plan on spending $3000-5000 not including paint/cosmetics to return vehicle to proper operating conditions then $2000-3000 every year after that to maintain.....

i have the keys the title and the car im fixing it not parting it it needs minor touch up for paint and i bought it for $2000 because the guy that owned it before me could not aford to replace the power stearing line. under the hood is great one turn over start, no thuds idels low around 1.5

I have time and money what els do i need oh yah that book got one, ill have my wife take a pic of the spedo for you next time then.

[pyro2134]

no offense but it kinda sounds like a parts car to me... no way that car was worth $2000 in that shape...

Anyway the light issue could be a door switch or something, do they flicker on and off when you drive the car?

The only way your going to fix the sunroof is to replace it with a whole new assembly. Since its stuck closed, your best bet is going to get some black RTV and seal it up that way...

i think it was worth every penny... yes they flicker when driveing, but only the interier Ithink you might be right on the door switch ill pull them one at a time after the bat charges...would it be a better idea to pull all 4?
The sunroof just neads a new switch 5min replace and weatherstrip, the only place iv found that has it wants $209 know anywhere cheaper might try my neighbor, Ill quote his price next

[Infinitiguy19]

Show us pictures of the car.

How many miles on the car?

Do you have receipts, Car Fax and Infiniti service history from previous owner?

How many keys came with the car along with key less entry remotes?

It idles a little more than twice the OEM new recommended idle you say (1500 RPM's)?

What does it look like inside the oil fill hole (Colors) Use a fiber scope if necessary)?

What do you want to do to your wife on the speedometer?

So it does 3000 RPM's at 120MPH?

How new are the tires and suspension?

You can find a service manual for your car from Ebay, Junk yard, Library....

[RustyBucket]

Welcome to the Q45 forum... Newbie beatdowns seem to be a bit of a tradition around here. When I first signed up, people told me I paid too much for my Q.

If you can post some pics of the car, we'd all love to see them

As far as the flickering interior lights issue goes, I'd recommend removing only one door switch at a time, that way you can narrow down which one is causing the problem more easily. Try the driver's door one first, it's probably seen the most use. If your idle is at 1500RPM, that is high, it should be below 1000, somewhere in the neighbourhood of 650RPM.

3000RPM at 120 sounds reasonable. Remember people: not every Q has the speedometer in MPH. 120KM/H is around 75MPH and 3000RPM at that speed sounds about right.

Whereabouts are you located pyro?

[Q45tech]

Every 90-96 Q45 has the same 4th gear and total gearing [3.538 x 0.694 = 2.45] the only variance is the loaded radius [depends on size and psi] of the rear tires.
Anyway all this results in 333 rpm [+-2.5%] for every 10 mph in 4th gear.

60 mph = 6 x 333 or 1998 rpm +-50 rpms [depending on tires and psi] with TC locked up so zero slip.


Measure the center of wheel to road to find loaded radius, then correct vs 12" to derive gearing effect from tires.

While a 26" [oem] should be 13" jacked off ground with ~~ 900 pounds on tire it may compress to less than 12" or 12" or 12.25" thus the 2% overdrive gearing effect.

[djwarner]

Not to be a stick in the mud, but why wouldn't the distance traveled in one revolution not be the circumference of the OD of the tire? I don't care how much a bicycle chain sags, but all the chain links have to pass a given point for it to make a revolution. Simply add up the number of links.

[drebin893]

Those early 1990's Q45s are awesome, even now. Had one over a decade ago. Replaced the fuel pump and A/C condenser around 100k miles. Other than that, no issues. The V8 in them was SWEET for its time.

[pyro2134]

I hope you can see those, if you can ill upload more.

[Infinitiguy19]

If I came off on the wrong foot I am sorry but its sad to see a nice Q go to the junkyard. If you want to at least learn how to car for it check out this that is a pinned topic on Q45 forum main page: thinking-about-buying-a-q-check-this-out-t213450.html.

Looks like you will need to bleed the brakes (master cylinder and ABS fluid).

And for the cosmetics:

1)First wash the car then use a microfiber towel and pat it down DO NOT DRAG IT AROUND TO DRY THE CAR, YOU WILL INDUCE MORE SWIRLS!!!

2) Go out and buy a clay bar kit (Meguiars Clay Magic and Mothers are okay) Meguiars is the toughest on the paint where as Mothers is softer, Not sure about Clay Magic.

3) Re wash the car then use a microfiber towel and pat it down DO NOT DRAG IT AROUND TO DRY THE CAR, YOU WILL INDUCE MORE SWIRLS!!!

4) Inspect for any swirls (I bet $20 that your car has tons of swirls)

Do you have a machine Polisher (Wax Master, Porter Cable...) or do you want to do the polishing by hand?

Either way get a gentle polish or use a cleaner wax and apply to the car. Follow the instructions on the polish or cleaner wax (Cleaner wax is a light polish, with fillers and then finishes with a layer of protection.

Good cleaner waxes: Meguiars NXT 2.0 (Paste or liquid (I like paste), Meguiars ColorX, Autoglym Super Resin Polish (SRP) (I haven't tried it but Autopia loves it).

The wash and dry as said above. Inspect for any remaining defect in the sun or a 1000 watt light or higher.

Do not start off with a rubbing compound because its best to go from lightest polish to the heavier stuff, Unless you are experienced.

If the above does nothing then post the results in the (dead) Detailing Forum of NICO, or Autopia.

[pyro2134]

any time someone touches this dimmer button/knob the lights go crazy and it tells me that a door is open. also it wont stay in
this is probly the 10th thing iv had to trouble shoot and still the lights flicker

I NEED THE SERVICE BOOK FOR MY 1992 INFINITY Q45.....ILL TAKE PDF,dead tree, torrent, hell tatoo it on your skin just send me a link

[Infinitiguy19]

Asking for a torrent on a public forum will surly get you in trouble.

I remember hearing this all the time "Spoon feeding stops when you leave the high chair (Baby chair). Most people today on the internet demand answers from nice people such as me. and I am glad to help provided you can help yourself. "Help me to help you, help me to help you..."

I NEED THE SERVICE BOOK FOR MY 1992 INFINITY Q45.....ILL TAKE PDF,dead tree, torrent, hell tatoo it on your skin just send me a link

You can find a service manual for your car from Ebay, Junk yard, Library....

http://cgi.ebay.com/ebaymotors/1990-INF ... _500wt_975
http://cgi.ebay.com/ebaymotors/1990-Inf ... _500wt_975

The dimmer switch not staying in a minor problem compared to the current ones you are facing. Unplug the dimmer switch and replace it with another. I have one for sale...

When you turn the dimmer switch do all the light "go crazy" or is it just the dome light?

The dome light, Diode, Door switches and Time Control Unit can go bad. Well I have never heard of a diode go bad (Knock on wood). Oh there is also a dome light relay another NICO member had go bad. That is located in the trunk on the right behind the trim panel (its blue).

And I know it may seem stupid but if your going to drive the car your driving, at the very least for the time you own it learn to spell the manufactures name correctly.

[qship96]

any time someone touches this dimmer button/knob the lights go crazy and it tells me that a door is open. also it wont stay in
this is probly the 10th thing iv had to trouble shoot and still the lights flicker

I NEED THE SERVICE BOOK FOR MY 1992 INFINITY Q45.....ILL TAKE PDF,dead tree, torrent, hell tatoo it on your skin just send me a link

Logic will tell you if your interior lights are flickering or going on/off and the message center displays DOOR OPEN when it is not THAT THE PROBLEM is a defective door pin switch ...........the damn car thinks a door is open because one of these door switches is not working as designed

[Q451990]

Infiniti never releasesed the FSM for a pre 1994 Q45 in a .pdf or other electronic format. The '94 FSM is good for mechanical things, but the cars differ greatly electrically.

Heath

[pyro2134]

Asking for a torrent on a public forum will surly get you in trouble.

I remember hearing this all the time "Spoon feeding stops when you leave the high chair (Baby chair). Most people today on the internet demand answers from nice people such as me. and I am glad to help provided you can help yourself. "Help me to help you, help me to help you..."

I NEED THE SERVICE BOOK FOR MY 1992 INFINITY Q45.....ILL TAKE PDF,dead tree, torrent, hell tatoo it on your skin just send me a link

You can find a service manual for your car from Ebay, Junk yard, Library....

http://cgi.ebay.com/ebaymotors/1990-INF ... _500wt_975
http://cgi.ebay.com/ebaymotors/1990-Inf ... _500wt_975

The dimmer switch not staying in a minor problem compared to the current ones you are facing. Unplug the dimmer switch and replace it with another. I have one for sale...

When you turn the dimmer switch do all the light "go crazy" or is it just the dome light?

The dome light, Diode, Door switches and Time Control Unit can go bad. Well I have never heard of a diode go bad (Knock on wood). Oh there is also a dome light relay another NICO member had go bad. That is located in the trunk on the right behind the trim panel (its blue).

And I know it may seem stupid but if your going to drive the car your driving, at the very least for the time you own it learn to spell the manufactures name correctly.

lol if i mispelled it so did the people who run this website i ripped it from them"top of page"{NICOclub Forums ‹ Infiniti Forums ‹ Q45 Forum / Cima Forum}.
yah know its been 3 days and no one said check above the spair? found my book. wow this thing has alot more than i thought.

the engine is VH45DE? dont know if thats good or bad This is my first computerized car
When the dimmer knob is touched the lights in floor,doors,dome, and all reading lights. also if a bump is hit.

[pyro2134]

any time someone touches this dimmer button/knob the lights go crazy and it tells me that a door is open. also it wont stay in
this is probly the 10th thing iv had to trouble shoot and still the lights flicker

I NEED THE SERVICE BOOK FOR MY 1992 INFINITY Q45.....ILL TAKE PDF,dead tree, torrent, hell tatoo it on your skin just send me a link

Logic will tell you if your interior lights are flickering or going on/off and the message center displays DOOR OPEN when it is not THAT THE PROBLEM is a defective door pin switch ...........the damn car thinks a door is open because one of these door switches is not working as designed

Tested all of the door buttons myself not the problem breath near the dimmer switch problems

[Q45tech]

As to tire they are only round when off the ground so the loaded radius is used to calculate the LOADED circumference.
Hopefully you realize that heavy loaded front tires don't travel the same straight distance as lightly loaded rear tires.

The method you suggest of counting revolutions runs into speedometer errors generated by the translation of frequency of the drive shaft revs to a 0>5 volt signal which drives the speed o voltmeter on display and same problem with odometer and trip display.


Many good GPS can calculate speed to within 1.0 mph but that is still 1/60 or 1.66% error, roughly what tires [same size variation] might induce.

[Q451990]

Glad you found the FSM! It's unusual for them to still be there... Seems they were all removed and sold on eBay years ago, but yes - the Q was so advanced for it's time that Nissan actually included the FSM to give non-factory trained techs. a fighting chance if you got stranded somewhere away from the dealership. The dimmer switch is designed to turn the lights on when you rotate it all the way to the highest point, so I can see that it could possibly fail that way. If you can recreate the problem by tapping it, then I think you've found it... time to replace it. Do you have a "you pull it" style salvage yard in your area? If so that will be the cheapest option... yours is the first switch failure I have heard of (other than the locking feature when you push it in) - so I think you're safe going with a used one.

Heath

[djwarner]

As to tire they are only round when off the ground so the loaded radius is used to calculate the LOADED circumference.
Hopefully you realize that heavy loaded front tires don't travel the same straight distance as lightly loaded rear tires.

I can understand that it will effect the torque since the moment arm is shorter, but the steel belts in the tires won't shrink, they just have a momentary flat spot.

[Q45tech]

The usual tire does contact the road with steel belts but the outer portion of the tread. Kinda like saying tread depth doesn't affect engine rpm whether 2/32" or 9-10/32".

[pyro2134]

Glad you found the FSM! It's unusual for them to still be there... Seems they were all removed and sold on eBay years ago, but yes - the Q was so advanced for it's time that Nissan actually included the FSM to give non-factory trained techs. a fighting chance if you got stranded somewhere away from the dealership. The dimmer switch is designed to turn the lights on when you rotate it all the way to the highest point, so I can see that it could possibly fail that way. If you can recreate the problem by tapping it, then I think you've found it... time to replace it. Do you have a "you pull it" style salvage yard in your area? If so that will be the cheapest option... yours is the first switch failure I have heard of (other than the locking feature when you push it in) - so I think you're safe going with a used one.

Heath

thanks but its looking like i need a new junkyard, I live in the middle of nowhere. well im the third owner of this car, its got 152k "miles"

so around when do the timeing chain guards go out? i was reading in some of the other fourms about the Q45 timeing chain guards being plastic????

[Q45tech]

A known failure mode since 1991-1992, why 1994 had the revised metal guides!
Thousands [25%] of the almost 40,000 sold have been modified either by dealerships, specialty shops, or have had replacement engines installed.
Pulling engine front cover and replacing front main seal and oil chain is the only way to know for sure!