The Q is not running right again.

A Q45 forum / Cima forum for the President of Infiniti's lineup. Brought to you by Infiniti Parts USA, your OEM source for Q45 parts!
dana0330
Posts: 68
Joined: Thu Jul 02, 2009 2:52 am
Car: 92 q45 83 jaguar xjs 03 GMC pickup 70 Dodge Charger

Post

The Q is loosing powewer and not running right when it is hot. I checked the resistance of the ijectors at the connector again all are reading 14 ohms. If I ground the pins I can only hear about 3 of them clicking but when it is cold I can hear all clicking. I replaced all the injectors last year with rebuilt ones I did not replace the harness the injectords are out of warrintee but I only put about 500 miles on the car in a year I did replace one injector about a month ago it was sticking open it was still covered. My question is what happens to the harness? Are there any injectors that are ok? I saw someone selling som on ebay for a good price he said they are the same ones that infinity uses.

Thanks Dana


qship96
Posts: 6624
Joined: Sun Nov 24, 2002 11:31 am
Car: 1996 Infiniti Q45

Post

No such thing as a "rebuilt" injector......there is brand new, used, or used and cleaned up and sold as "rebuilt".....seems dumb to replace with anything but brand new considering the labor involved to get to them......and "savings" by buying used is quickly eaten up by short life and duplication of labor to change over and over, as both you now are experiencing......never confuse price with cost!!!!!!

User avatar
lino
Posts: 3533
Joined: Mon Aug 15, 2005 7:48 am
Car: 1991 Q45a Fed-Spec, IQP/White, Texasoil 9 Accumulator Recharge, '93 TCU 1st Gear Start, JWFSB, B&M 70268 Transmission Cooler, BBS Forged Wheels, DRLs, Silverstars, Tint, Very Well Serviced.
Contact:

Post

Since the oem stuff is crap and isn't cheap either, what is the alternative? :gotme

User avatar
Q451990
Moderator
Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
Contact:

Post

rabsusa wrote:how come injs are so unreliable? i m comparing Q to a 95 honda accord, cheap gas beater, never any work or attention paid to it and it run flawlessly all the time
Ahh as regular as the sun rising in the east and setting in the west - rabusa will show up in any injector thread to talk about how terrible the Q's injectors are vs. his beloved Honda... Every car has it's problem parts. The Q's injectors work flawlessly for decades when used with what they were designed to squirt - GAS! Remember that these injectors were designed in the late 1980s - over 20 years ago - to run with quality fuel - not the crap that we're forced to buy now. So yes, your Honda injectors are able to accept something that didn't exist back in those days - but you can't fault Nissan/Bosch Japan too much for failing to anticipate a change in fuels years after they designed and built these injectors. Maybe you can fault them for not redesigning them and offering a more reliable replacement - but support for cars of our age probably isn't going to be that robust from any company.

Dana - who "rebuilt" your injectors? I think the ultimate answer is either the BWDs - see my thread on that subject below - or possibly Deatschwerks new aftermarket injector. I suspect they are BWDs as well, but I have no way of confirming that. Of course, we don't have a good sample pool to know if that's the ultimate solution - but it looks promising so far.

g50-aftermarket-injector-alternative-t347484.html?

Heath

qship96
Posts: 6624
Joined: Sun Nov 24, 2002 11:31 am
Car: 1996 Infiniti Q45

Post

rabsusa wrote:
be that as it might be, how come injs are so unreliable? i m comparing Q to a 95 honda accord, cheap gas beater, never any work or attention
paid to it and it run flawlessly all the time????? - i d be dead in a hole if i EVER had to rely on Q as sole car,
face it Q lovers, this car is besowed with OEM crap injectors and fuel pumps,

R

The above has NOT been my experience at all with my Q......I changed my original fuel pump at 110,000 miles due to a little noise- I have put 149,000 miles on this second pump so far now and it is still quiet. as far as injectors go, at 259K my factory installed originals are operating great, despite using only ethanol containing fuels for the last 100,000++++ miles {and MTBE laced fuels before then since brand new} how much more could one ask for??????????

User avatar
Q451990
Moderator
Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
Contact:

Post

You have been very lucky! Maybe your Q is afraid to fail since you've made it clear that one major system failure means a trip to the salvage yard... :D

Heath

User avatar
BCC93QT
Posts: 1385
Joined: Tue Feb 12, 2008 3:20 am
Car: 1990 Infiniti Q45
1995 Infiniti Q45
Location: Western MA

Post

Definately not the car if we have plenty of G50's with 200k and 300k sounds like some "deferred maintenence" < Dennis or some stupid cheap routes you take to save some pennies. Its definately got something to do with the "mechanic" that is fixing the car. Haven't had a problem with my phase 2 injecters from deatschwerks. The more idiots that own G50's the more mine is going to be worth!!!!!!! Rabs, you complain about the Q then get rid of it. Trade it for a honda civic! or an accwhord. the pump in my new body lasted 203K miles as well as 16 years. Maybe your putting some cheapo gas or someone pissed in your gas tank?

dana0330
Posts: 68
Joined: Thu Jul 02, 2009 2:52 am
Car: 92 q45 83 jaguar xjs 03 GMC pickup 70 Dodge Charger

Post

The injectors I got were "rebuilt" from GB. I bought them from Rockauto I called them today to find out if they can help me out I bought thr injectors over a year ago but did not get the car on the road untill May I put less than 500 miles on the car. the operator at Rockauto put me on a 3 way call to GB and I called him out on the rebuilding they only clean tem and flow test them and I said that is false advertising that the should sell the injectors as cleaned. some of the ones they sent may have been bad to begin with what a pain I only needed 2 I should have replaced the 2 and moved on but I thought that since I had the plenum off it made sence to replace all the injectors. when I buy new ones does anyone think I should replace the harness or since the resistance is ok not to?

User avatar
BCC93QT
Posts: 1385
Joined: Tue Feb 12, 2008 3:20 am
Car: 1990 Infiniti Q45
1995 Infiniti Q45
Location: Western MA

Post

Honestly the harnesses usually don't fail atleast i dont hear much about them. A dead harness means a dead injector. And usually they don't just DIE they slowly go. MAybe im wrong though. Its usually the injectors themselves. As for replacing just 2, its up to you, more peace of mind it you replace all 8 but its all about how much time money and effort you are willing to put in at the time of repair. I have had great luck with my deatschwerks phase 2's with harnesses but thats a 1000$ investment just for parts. all 8 injectors (o rings caps spacers lube) and harnesses. Maybe try a junkyard with 8 injectors and harnesses and send them to deatsch. like 25$ rehab per injector + shipping thats 200$ + original price of junkyard crap your looking at 500+........ i would probably go with the whole shabang from deatsch but like i said, its determined on the time money and effort your willing to put into it. You get 12 months from deatsch BTW Oh when you did you injectors you did replace the rings and used the grease? pindle caps intact?

User avatar
Infinitiguy19
Posts: 7787
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Post

When the Q was designed around 1987 they didn't plan for E10 (10% Ethanol). Nissan told the US Government that there injectors would fail a couple of years after the car was released. The US Government said they didn't care....And here we are today. So Nissan isn't at fault because they can't predict the crappy future were in today.

Dennis and Qship96 don't replace injector often, Well Qship96 has yet to replace one "Knock on wood".

There is a guy that used to come on the forum called "3rdQ" AKA Paul, he replaced 37 injectors between his Q's.

Rabsusa switch to 1996 Infiniti Q45 fuel injectors because I haven't seen many failures with those.

OwnerCS
Posts: 1771
Joined: Thu May 27, 2010 4:34 am

Post

From my experience, the more complex or fully featured cars with 6 or 8 cyls, seem to require more attention than the 4 cyl cars that many companies made their reputation producing. I always think about the P-144 Volvo as the simple machine that grew into a fairly complex luxury sedan/wagon.

My V6 Ridgeline has had a few issues along the way. So far it has had transmission seals replaced, front and rear main seals, and new inner CV joint boots -- all at different times. I am glad that I bought the extended warranty or I would have been out over $2,500 so far. Peeling clearcoat paint and premature wear on the driver's seat required repair or replacement at the 2 year mark. The paint and trim cost me a good $1,000 out of pocket to correct. I almost forgot the driver's door seal wore out at the two year mark as well.

If the rear transaxle should fail, or is damaged by some piece of flying metal on the interstate, I understand that is one expensive item to replace as a whole new unit must be ordered. I remember someone saying it costs over $3,000 for that item. Actually the Ridgeline and higher end Honda transmissions are made by Borg Warner. Honda was late to the automatic transmission game, so they seem to license most of their transmission technology from Borg Warner. For many years, Hondamatics were like an achillies heel.

I've got a Civic that has only required A/C maintenance -- but I can't stand to drive it.. So it doesn't get driven much.

So my Ridgeline and Q now have roughly the same mileage. I've already got new BWD injectors to be installed, and another $2,500 in parts on the way from IOS (and others) to bring the Q up to what I hope will be better than new condition. I hope the maintenance steps I'm taking will last another 100,000 miles or longer. Though Q will most likely continue to live a pampered life.

Here's my situation, over the past three years, the Ridgeline has been depreciating at a steady $3,500 per year clip. Today it needs to have the 100,000 mile service (timing belt, water pump, tensioner pulley, seals, valve adjustments, plugs, and O2 sensors) that is the standard 100,000 mile service. All that will cost roughly $1,200 to $1,400. After that, I get to worry about an extremely expensive transmission and transaxle setup. In addition, it has 8 fairly expensive CV joints -- to replace at some point in the future.

Oh how I wish the Ridgeline had paint and a quality leather interior like the Q. I've got peeling paint starting again on the front bumper. I don't care about the seats fraying out again now that it has over 100,000 miles. A couple of weeks ago, a squirrel lost a hickory nut that bounced off the roof. That nut bounce left a ding that looked like someone hit it with a ball end hammer. The sheet metal on the roof is so thin it easily dents. In addition, most Ridgeline owners have replaced the windshield at least once because it is so thin -- to be lightweight. I just found another crack last week..

I am seriously thinking about a Nissan Titan 5.6L so I can pull Q (on a trailer) to some car shows next year. I cannot imagine it costing more to maintain than the one I have – and that one has difficulty pulling 4,000 lbs. If I were to try to pull something with it, I would most likely shorten the life of a terribly expensive transmission and transaxle.

I'm not afraid to work on Q because this is one great club with some "top gun" mechanics who provide great guidance. As far as I'm concerned, NICO is really changing my new car buying preferences.

Since the Q has already bottomed out -- from a retail value perspective -- it has nowhere to go but up. All cars -- especially classics -- go through a bottoming out period. I remember when people were giving away cars to the scrap metal men -- that now sell as classics for over $40,000. I saw people give away retractable hard top 1958-1959 Fords because one or more of the roof operation solenoids had gone out. If they only knew what they were giving away or junking out at the time..

To me the Q is a solid car made from good material to enjoy over the long haul.
Last edited by OwnerCS on Thu Sep 09, 2010 5:13 pm, edited 1 time in total.

User avatar
lino
Posts: 3533
Joined: Mon Aug 15, 2005 7:48 am
Car: 1991 Q45a Fed-Spec, IQP/White, Texasoil 9 Accumulator Recharge, '93 TCU 1st Gear Start, JWFSB, B&M 70268 Transmission Cooler, BBS Forged Wheels, DRLs, Silverstars, Tint, Very Well Serviced.
Contact:

Post

That's why today's cars are simply disposables (no disrespect). Drive them until the warranty runs out or buy an extended warranty and then sell it when that warranty runs out. My friend just bought a CLS55 AMG and bought the extended warranty for thousands $$ extra, which has come in real handy. It's almost paid for itself in just 3 months!

Can you imagine the poor guy who buys a Volkswagen Phaeton W12 without warranty :ohno:. Kind of reminds me of the Audi 5000 :facepalm:.

http://onlineslangdictionary.com/defini ... /audi+5000

User avatar
Infinitiguy19
Posts: 7787
Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

Post

OwnerCS wrote: Since the Q has already bottomed out -- from a retail value perspective -- it has nowhere to go but up. All cars -- especially classics -- go through a bottoming out period. I remember when people were giving away cars to the scrap metal men -- that now sell as classics for over $40,000. I saw people give away retractable hard top 1958-1959 Fords because one or more of the roof operation solenoids had gone out. If they only knew what they were giving away or junking out at the time..

To me the Q is a solid car made from good material to enjoy over the long haul.
I know what you mean...Today I went to pick up some stuff and I made sure to park a couple of hundred feet from the store so no f*** ups touch my car. I come out and see a carriage next to my car and a tiny dent. I kick the carriage hard enough to make it unusable and continue on with my day.

People have no respect these days, I can only hope the person responsible gets hit by a bus. :facepalm:

User avatar
Q451990
Moderator
Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
Contact:

Post

Part of why I'm terrified to get the Q out of the garage sometimes. In the last month our son's sitter had her car damaged in a Wal Mart parking lot to the extent that she couldn't even open the two right side doors, and my mother in law had her van damaged enough in a parking lot that it's going to need a new tailgate, tail light, and bumper cover. Both hit and runs - no note, no nothing. I swear about 25% of the driving public needs to have the s... kicked out of them...

dana0330
Posts: 68
Joined: Thu Jul 02, 2009 2:52 am
Car: 92 q45 83 jaguar xjs 03 GMC pickup 70 Dodge Charger

Post

I went on Deatschwerks websight and I will buy the injectors and the install kit from them I am into the car for alot what is 800 more on a car I got for 300 I fixed all the week points in the car the body needs som work but I use it as a spae car at my shop if I get 50-100k out of it it will be worth it plus the learing experiance was priceless.

OwnerCS
Posts: 1771
Joined: Thu May 27, 2010 4:34 am

Post

I decided to go with the DW Phase II kit on mine. Chris is great to deal with.. DW offers a special anodized (plated) version of the adapter that is designed to enhance corrosion resistance. I like the new injector plugs that come with the kit.

User avatar
paranoidjack
Posts: 1417
Joined: Mon Oct 03, 2005 3:57 pm
Car: 2012 Infiniti M56 S
2003 Infiniti M45
2001 Infiniti QX4
2000 Infiniti Q45
1998 Nissan Pathfinder
1996 Infiniti J30

Post

"You have to pay to play."

More breaks because there are more parts. Not much to focus on for $15k. Hondas don't have good starters.

BadQ45t
Posts: 3255
Joined: Fri Jul 26, 2002 7:54 am
Car: '21 Nissan Leaf SL Plus (wife's car)
'05 Nissan X-Terra S 4x4
'97 Infiniti Q45t SOLD! Miss the old girl
'84 Nissan 300ZX (Original Owner)
'16 Mercedes Benz S550e V8 Power & 35 MPG
Location: Half Moon Bay, CA

Post

I think that the Q is not a car the runs well over time if you didn't do the regular maint. I have an 05' X-Terra that so far is very reliable, I paid $1800 for extended warranty and so far it was a waste of money. My 97' Q I have treated very well over the years, very regular oil changes, all fluids, etc. I have not had anything really go wrong with the car. I did have a sqeeking noise out of the brakes that cost me $120 mostly due to time to diagnose the issue.

Overall if you took care of the car from day one it would wear very well, even 1st gen. The cheaper lower-end car from Honda, Nissan, Toyota does better with more things ignored, that is for sure. My 85' Maxima had a 1st owner that most ignorned everything........those injectors sucked too but Nissan paid to repair them. I think overall a luxury car just needs more TLC. Next time stick to base level car from any of the Japanese cars and you'll be happier. Buying a neglected Q is not my idea of reliable.

dana0330
Posts: 68
Joined: Thu Jul 02, 2009 2:52 am
Car: 92 q45 83 jaguar xjs 03 GMC pickup 70 Dodge Charger

Post

Does anyone know if the replacement injectors from Infinity are ok, or should I spend moere and get the phase II injectors? There is a guy on ebay selling a set that he said is the same ones that you get from Infinity and he wans about $650 for the set of eight. I only want to pull the plenum off one more time, it is getting easier mabey I will put it back togher with velcro this time :chuckle:

User avatar
lino
Posts: 3533
Joined: Mon Aug 15, 2005 7:48 am
Car: 1991 Q45a Fed-Spec, IQP/White, Texasoil 9 Accumulator Recharge, '93 TCU 1st Gear Start, JWFSB, B&M 70268 Transmission Cooler, BBS Forged Wheels, DRLs, Silverstars, Tint, Very Well Serviced.
Contact:

Post

dana0330 wrote:Does anyone know if the replacement injectors from Infinity are ok, or should I spend moere and get the phase II injectors? There is a guy on ebay selling a set that he said is the same ones that you get from Infinity and he wans about $650 for the set of eight. I only want to pull the plenum off one more time, it is getting easier mabey I will put it back togher with velcro this time :chuckle:
Somebody on here bought a set from that ebay seller. I can't remember who though.

Here's their website:
http://www.fiveomotorsport.com/fuel-injectors/nissan

User avatar
lino
Posts: 3533
Joined: Mon Aug 15, 2005 7:48 am
Car: 1991 Q45a Fed-Spec, IQP/White, Texasoil 9 Accumulator Recharge, '93 TCU 1st Gear Start, JWFSB, B&M 70268 Transmission Cooler, BBS Forged Wheels, DRLs, Silverstars, Tint, Very Well Serviced.
Contact:

Post



Return to “Q45 Forum / Cima Forum”