Failure of Another Set of Injectors

[Q45denver]

I had another set of injectors fail. This time on my 1995. The symptoms where the same. Car runs rough for a couple days, I park it, can't start it, and by the time I get around to ohm testing the injectors they all read in the 800 ohm range. Has anyone had any failures like this or am I the only one? Is there any knd of fuel additive or anything (besides ethanol) that would cause them all to go bad so fast?

[goody90q45]

It seems improbable that all 8 injectors would go bad at the same time (twice?) and all be ohming the same. I suppose you could be the one out at the far end of the bell curve though. A couple of questions to maybe get you out of this mess:>> Did you ohm at least #1 and #2 FI at the injector to see if you get the same readings?>> Calibrate the voltmeter with a 10 ohm resistor? Replace it's battery recently?>> Battery voltage with engine running?>> ECU codes?>> Been messing with fuel additives again?

[captainluigi]

Damn good advice Mike. Kudos.

[Q45denver]

Damn good advice Mike. Kudos.

Yes, it was.

It seems improbable that all 8 injectors would go bad at the same time (twice?) and all be ohming the same. I suppose you could be the one out at the far end of the bell curve though. A couple of questions to maybe get you out of this mess:>> Did you ohm at least #1 and #2 FI at the injector to see if you get the same readings?>> Calibrate the voltmeter with a 10 ohm resistor? Replace it's battery recently?>> Battery voltage with engine running?>> ECU codes?>> Been messing with fuel additives again?

Could not get accurate reading at harness but when testing at injector got ohm range within factory spec. Appears it was the fuel pump as it went same time as the one in my Frontier a couple days after adding the same fuel additive. I knew the one in my 1995 Q45 was making noise but it only has 80K miles on it. The fuel pump in my Frontier was also expected as the truck has 140K but was making no noise. BTW, the one in the truck is harder to changeout and costs more. You have to remove the fuel tank to get it out. That might not be a bad idea on the Q45 as well but you better make sure that the tank is empty.

[qship96]

What fuel additive are you blaming for destroying 2 fuel pumps?

[maxnix]

What fuel additive are you blaming for destroying 2 fuel pumps?

Lucas, by any chance?

[qship96]

well Lucas was the prince of darkness.

[Infinitiguy19]

So are all lucas oil products bad or just the oil and fuel additives?

[Q45denver]

What fuel additive are you blaming for destroying 2 fuel pumps?

My own concoction of a combination of BG44K with a couple of ounces of acetone and some 99% Isopropyl. I would make it up in one gallon batches and sometimes added some Xylene and maybe some MMO. Since I hadn't been driving much recently, I hadn't been using it much.

Pumps were due to be replaced anyway but died more suddenly than expected. Luckily in my driveway both times.

[maxnix]

So are all lucas oil products bad or just the oil and fuel additives?

Read http://www.bobistheoilguy.com and decide for yourself.

Lucas is also the God of Immobility too now evidently if you worship long enough.

[MinisterofDOOM]

Interesting. I've alternated Lucas and Techron in the Maxima for years. 250k miles on original injectors (late 1992 build date).

[Q45tech]

It's the dismal fuel quality, not even good enough to use in an lawnmower or weedwhacker much less a vehicle engine.

Every year the gallons of gasoline [not even considering E10] produced from a barrel of oil has increased................something has to give.

[Sanger]

Read http://www.bobistheoilguy.com and decide for yourself.

Lucas is also the God of Immobility too now evidently if you worship long enough.

Are we talking about fuel or oil additives? Bob the Oil Dude only talks about oil additives (as far a I read).

So are you saying the Lucas fuel additive is bad based on Bob the Oil Guy's Oil additive (which is added to the engine oil) comments?

Typically fuel pump failure is due to poor gas or running it dry (gasoline lubricates the pump) or the DC brushes failure due to age.

Cheers.

[Q45tech]

Unfortunately, most members don't spend a hour researching and formulating their replies.

As to fuel pumps research E10 pictures of fuel pump commutators and the water corrosion.

[maxnix]

I am deducing from their oil additive, Lucas does a crap job researching their products.

Like P. T. Barnum said, "A sucker is born every minute."

Or Harry Callahan, "Do you feel lucky, punk? Well, do you?"

[Q45tech]

My point is the gamble in filling up the tank is much much worse than any fuel injection system cleaner you might put in after the fact.Never seen an additive contain water, like the bulk of gasolines do today.They can't help it some water gets in regardless of how careful they are.*

Going to a strange [non regular] small gas station is risky............if you chose one you have only yourself to blame.

Unless you maintain samples of the product you buy for future litigation.

* Had a converstion with a few tankers about what they do if it starts to rain while the nozzle is in the ground tank..............how much water on the moisture stick is too much, etc etc.

http://www.aventinerei.com/pdfs/fuel_grade_spec.pnote water max is 0.82%

[maxnix]

Lets not talk politics. Just stick to the facts.

Are you running for President?

Economics can always be made political. Facts are the facts.

Did you read the article?

I would think the best any fool could hope from a Lucas additive product is that it does no harm. Obviously, some of their products do harm, but suckers like you keep them in business.
Modified by maxnix at 3:23 PM 9/26/2008

[Sanger]

Never used their products.

Being an engineer, I always need true facts to come up with true conclusion.

[maxnix]

Never used their products.

Being an engineer, I always need true facts to come up with true conclusion.

Understand, but that is why they walk off cliffs because they are looking no further thatn the ground that is under their feet.

Sometimes takinga leap of faith in reason is better than knowing the consequences.

Kind of like drinking gasoline. No one will know the true facts of its effect until one drinks it, but I would avoid drinking because I would deduce its ingredients would produce effects that would not be beneficial.

[NightRiderQ45]

Lets not talk politics. Just stick to the facts.

Are you running for President?

I'm a member over at BITOG and please don't use Lucas products!! I don't feel like finding the posts over there, but take my word! It's a waste of money. If you want a decent fuel injector cleaner, purchase Gumout Regane or Redline S1! The new BG44k formula doesn't cut it.

Engineer...what field? I'm a Electrical myself.

[Q45denver]

Does anyone know if the injector problems are specific to certain years of Nissans? I am aware of problems with early Q45's and 300ZX TT but it does not appear to be an issue with my 1998 Frontier injectors even though they look similar to the 95Q's?

Just to be on the safe side, no more fuel injector additives for me in any Nissan products. Although I might risk running some through the fuel rails directly.

I don't think the gas I had in the tank had anything to do with the failure, because I purchase it at different stations and locations for the two vehicles.
Modified by Q45denver at 7:55 PM 9/19/2008

[Jesda]

Does anyone know if the injector problems are specific to certain years of Nissans? I am aware of problems with early Q45's and 300ZX TT but it does not appear to be an issue with my 1998 Frontier injectors even though they look similar to the 95Q's?

Just to be on the safe side, no more fuel injector additives for me in any Nissan products. Although I might risk running some through the fuel rails directly.

I don't think the gas I had in the tank had anything to do with the failure, because I purchase it at different stations and locations for the two vehicles.

In 1994 the Q's injectors changed. Some members here have had success putting 94 fuel rails in their 90-93 Qs. Your Frontier can handle American gasoline without any trouble. You could probably pour Hawaiian Punch in it if you wanted to.

[Infinitiguy19]

In 1994 the Q's injectors changed. Some members here have had success putting 94 fuel rails in their 90-93 Qs. Your Frontier can handle American gasoline without any trouble. You could probably pour Hawaiian Punch in it if you wanted to.

Thats true but there are still some that have injectors go at least that what i hear from Q45tech.

[captainluigi]

10 oz. 99% IPA & 2 oz. Redline S1 per fill works for me.

[elwesso]

IMO anything you can get over the shelf isnt worth anything. They have to make it for those that thing that "2 bottles is better than 1" so it doesnt screw their car up!

In response to the other issue, I really think you need to consider replacing your harness.

[Q451990]

In 1994 the Q's injectors changed. Some members here have had success putting 94 fuel rails in their 90-93 Qs. Your Frontier can handle American gasoline without any trouble. You could probably pour Hawaiian Punch in it if you wanted to.

I have personally seen at least two cars with Phase II injector failures - one belonging to the service manager of my local dealership. T3 is seeing failures on the 94-96 Q equal to 90-93 proportionally. So the theory that phase II's will hold up better to E10 fuels vs. phase I injectors isn't panning out.

I should be installing my aftermarket phase II injectors this week if my big box-o-stuff shows up from IOS on time ... I'll revive the thread about those injectors as I get into the project.

Heath

[Q45denver]

Just had another fuel pump go out on my 1998 Nissan after driving it less than 10 miles this time. Nissan dealer would not clean out fuel tank even though repeatedly requested that they do so and tank is less than 1/4 full. Also fuel pump replacement requires pulling the tank so it would not add much to labor.

[Infinitiguy19]

So do you get a replacement with free parts and labor?

[Q45denver]

No, First pump probably had 130K miles so not warranted, second pump was from NAPA store across the street because dealer did not have the pump in stock and NAPA claimed that it was OEM. Pump alone cost $347-same as OEM. Dealer said they only warranty OEM factory pumps even though NAPA claims that it is OEM and shows as being OEM on their website. Also won't cover the tow bill.

Dealer also claims there aren't any factory pumps in Denver so I had to have them overnight the third pump which they have installed again without cleaning the tank (even though I have told the service adviser at least a half dozen times to do so). Conveniently he went home early on sick leave.

I was going to pickup the car today but the service manager said that he would not release it until they have a chance to clean the tank and also won't warranty it unless they do so. Also refuses to install a forth pump. Hopefully the pump has not been in the tank long enough to be damaged.

[Infinitiguy19]

After the second pump I would have owned that dealership. I had the nearly the same problem exept it was with O-rings:

If you don't mind me jacking the thread:

I had a 1991 Q45 (Let my sister drive it and she hit a tree with me in the passanger seat because I didn't feel like driving) I lived to tell this story as did my sister but the car did'nt.

Anyways I went to this shop my dad new for a year and had beed taking his truck there for a year (Yea I was young and dumb back then) but the guy that replaced the fuel pump used BIGGER SCREWS and then thought nothing about the tank holding pressure.

So I leave the shop and the car ecpecially the trunk smeels like gas and later (2 Months later) we find out what he did but we kept going though o-rings (Dealer only $11 each) about 5 of them at least I lost count but we see what he did and then sue him and get a new tank and fix the problem for a month then CRASH.

Sorry for thread jacking.