You are here: Forums Sedans Infiniti Q45 Infiniti Q45 Maintenance and Repair

Infiniti Q45 Maintenance and Repair

243 messages,  Last post on Nov 10, 2009 at 8:58 PM

You are in the Infiniti Q45 Forum. Your Hosts are pat & karens

What is this discussion about? Infiniti Q45, Sedan

Messages Page 25 of 25 1 ... 19 20 21 22 23 24 25 Prev Next Last

Go To Msg # Search This Discussion

#234 of 243 Re: my '92 Q misfires on take off [walis] by qualoo1 Jul 14, 2009 (4:34 am)
Replying to: walis (Jan 03, 2007 7:31 pm) I just had a similar problem with my 95 Q and I had the dealer check for bad knock sensors. That was it!! I had the two knock sensors replaced with the harness and the problem was no more. These cars use knock sensors for optimum timing and gas usage. When they go bad, the car will misfire while driving or during acceleration.
#235 of 243 traction control problem by hlmurray Aug 07, 2009 (5:28 pm)
Just got in car started it traction control light on saying its off and spin illuminated. can this be reset or is their a problem i need to have check out oh by the way its a 97 Q45
#236 of 243 tcs light on by hlmurray Aug 07, 2009 (6:08 pm)
1997 infinity q45 145k. after starting car tcs off light illuminated and spin illuminated. has remain on. can it be reset? it will spin in gravel so the tcs is off. pushing button does not affect the light. help
#237 of 243 Re: Navigation screen goes blank [mlarkin1] by bofbilal Aug 21, 2009 (8:45 pm)
Replying to: mlarkin1 (Jan 04, 2008 8:06 pm) can anyone please respond to this. I am having same problem
#238 of 243 97 Q45 misfire by tarkar Oct 04, 2009 (5:34 pm)
I have a 97 infiniti Q45 that I may have to get rid of due to excessive repair costs. I have recently replaced all 8 fuel injectors and 2 knock sensors. The problem is that the car more often than not runs with a lack of power, but no other conditions. It occasionally misfires when idling. When driving the car and removing foot from gas pedal and then trying to accelerate, the engine will shake violently. It then is almost impossible to get the car to increase speed regardless of how much you push the accelerator. Once you pull off to the side of the road, the SLIP, TCS and CHECK ENGINE lights come one before the car stalls. My mechanic says the fault code is the air mass meter. Tried replacing it, but problem got worse. When you restart the car, it may run alright (still lack of power) or it may stall again. You may have to turn the car on and off several times before it will run acceptably. The problem seems to be worse when the fuel tank is low, or after a long downhill section of the road. Also, the car may run for a week between the violent "misfires". Any help would be greatly appreciated. By the way, before I replaced the fuel injectors, I had the local dealership diagnose my problem, and they recommended the injector replacement. Replies to this message: walis (Oct 05, 2009 3:51 am) sidwell (Oct 06, 2009 7:23 am)
#239 of 243 Re: 97 Q45 misfire [tarkar] by walis Oct 05, 2009 (3:51 am)
Replying to: tarkar (Oct 04, 2009 5:34 pm) I had the same problem for a while. I did everything from changing all 8 spark plugs, all injectors, air flow meter, egr valve, etc...none fixed the issue. So one day I decided to re-visit the spark plugs but this time I pulled apart the boots and the coil packs one at a time...VOILA...THERE...one of the coil packs had a tiny amount of oil right where the contact is...so that was oreventing it from sparking. I spray cleaned it and all other seven (just to be certain), let them dry and re-installed all. The car has been running like a wild horse on cocaine since then...I LOVE MY Q! One note...to maintain a Q, it helps to be handy or else you'll spend a lot of money. Replies to this message: sidwell (Oct 06, 2009 7:23 am)
#240 of 243 Re: 97 Q45 misfire [walis] by sidwell Oct 06, 2009 (7:23 am)
Replying to: walis (Oct 05, 2009 3:51 am) I had a terrible problem with my 2001 Q45, with symptoms very much like those above. It even shifted gears poorly, if at all. A friend at a gas station hooked up his OBD Reader and got back Oxygen sensor problems and 3rd gear problems. I bought some catalyst cleaner from JC Whitney and put it in the gas. It stopped most of the problems immediately! The remaining problem is that when it starts it kinda lopes idling until I step on the gas and then it quits. It doesn't lope at traffic lights or other stops, just when I first start it it. Even if I drive a few miles and park it, it will still lope when first restarted.   Any ideas? (I swear that cat cleaner worked wonders!) Bil
#241 of 243 98 Q45 brake and check engine light by aircalgal Oct 10, 2009 (5:30 pm)
My brake light has been going off and on for some time. Now the check engine light is coming on. The car has been serviced, so there is nothing wrong. Do I need a new sensor or could it be the alternator. If it is a sensor, how much does that cost. Replies to this message: sidwell (Oct 11, 2009 7:08 am)
#242 of 243 Re: 98 Q45 brake and check engine light [aircalgal] by sidwell Oct 11, 2009 (7:08 am)
Replying to: aircalgal (Oct 10, 2009 5:30 pm) My experience with Japanese cars is that when the alternator starts going bad, it first affects the sensors, causing the warning lights to come on. I've owned Japanese cars since my first 280ZX (first of four ZXs). Only problems were with alternators failing, like on my current car, a '01 Q45 Anniversary Sports model. Good luck, Bil
#243 of 243 2 questions 1999 Q45 by norwesterner Nov 10, 2009 (8:58 pm)
Question 1. Low beam headlight. How do I change it? From the front or back? From the back there is a wire that pops off but can't seem to remove the light, not sure it is the correct light anyway, it is next to a 2 inch round plastic unit with fins on it.    Question 2. When I am sitting a red light the engine starts missing and then when I start moving it misses for about the first 100 feet or so.    Any suggestions? Thanks

Messages Page 25 of 25 1 ... 19 20 21 22 23 24 25 Prev Next Last

Go To Msg # Search This Discussion

You are here: Forums Sedans Infiniti Q45 Infiniti Q45 Maintenance and Repair