Terios Misfire, Injectors Maybe??

Submitted by andyterios on

Forum: 

Hi all,
I have a 1999 Terios which has developed a misfire, I've ordered a new set of plugs and leads but I have been told to check / clean or replace the injectors. Could anyone give any further info on this such as is it common for the injectors to be at fault and also how do I remove them and clean them? I'm a novice diy'er so explain in simple terms please. Thanks

In very simple terms, don't

Submitted by assassin on

In very simple terms, don't remove them.

Cleaning is very simple, obtain a fuel system cleaner from your local motor factors, not the aggressive types, but one which cleans over a longer time as rapid cleaning often dislodges too much too quickly which can cause many other problems.
Add this to your fuel and let it do its thing, if it improves slowly then its dirty injectors.

Next issue is terminal corrosion:

Obtain some electrical cleaner or contact cleaner (DO NOT USE WD40 AS THIS CORRODES CONTACTS) and pull the electrical plugs to each injector in turn, spray the cleaner liberally into both halves of the plugs to clean the contacts, reconnect. If this cures it you have confirmed an electrical problem, most likely because someone has sprayed them before with WD40.

WD40 Corrodes?

Submitted by x on

Assassin,

Your WD40 statement is not consistent with the known functions of WD40.

WD-40 fulfils five basic functions:

1. CLEANS: WD-40 gets under dirt, grime and grease to clean. It also dissolves adhesives, allowing easy removal of labels, tape and excess bonding material.

2. DISPLACES MOISTURE: Because WD-40 displaces moisture, it quickly dries out electrical systems to eliminate moisture-induced short circuits.

3. PENETRATES: WD-40 loosens rust-to-metal bonds and frees stuck, frozen or rusted metal parts.

4. LUBRICATES: WD-40's lubricating ingredients are widely dispersed and tenaciously held to all moving parts.

5. PROTECTS: WD-40 protects metal surfaces with corrosion-resistant ingredients to shield against moisture and other corrosive elements.

Regards

it dries out and the residue

Submitted by If theres mud i... on

it dries out and the residue left behind-bit like a varnish actually attracts moisture, moisture = rust unfortunately.

Full of ideas but no time to do them!!

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Contradiction

Submitted by x on

If theres mud,

The long-term active ingredient is a non-volatile, viscous oil which remains on the surface, providing lubrication and protection from moisture. Which contradicts your statement.

Regards

BG44k

Submitted by Curt3 on

I've used bg44k to clean injectors following a lean misfire in a petrol 1.3 YRV. has worked well.

Getgripped, you are correct

Submitted by assassin on

Getgripped, you are correct with the product applications, but when it comes to copper it attacks the surface over time, and as ITM has stated, it dries out and leaves a residue of dirt which attracts moisture, and they have a disclaimer on their website which confirms this.

Not only that, I have seen many of these problems for myself when dealing with electronics, basically they work on resistances, power feed, or pulse generation systems; and these are so accurate any corrosion will severly impede an engines performance as the least little signal interruption will screw it up by putting it out of its working range.

WD40 is great for many other things such as coated steel contact systems used in lighting systems as they are Zintec coated steel components and WD 40 is fine on these.

WD40

Submitted by x on

Assassin,

So what you are saying is a product specifically designed for anti-corrosion applications will corrode copper, which, as it happens, is one of the most naturally corrosion resistant metals. It is hard to believe - and I don't believe it.

Please show the disclaimer on the WD40 website.

Regards

its not specifically designed

Submitted by If theres mud i... on

its not specifically designed for anti corrosion, it was invented as a water despersant....hence wd

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righto......well I think if

Submitted by If theres mud i... on

righto......well I think if you doo a test at home on some metals, spray them with wd 40, leave over time, then we can see what happens cant we, bloody hell arguing over wd40...geeez

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Geez, indeed.

Submitted by x on

Firstly I am not arguing. One person makes a claim and another has the right of reply. That's how forums work.

So far the people I am "arguing" with have made claims that just don't stand up to scrutiny. Show me the facts and I will stand corrected.

My assertion is that WD40 does not corrode copper as has been stated by others -it is harmless to metals and to say otherwise is incorrect. Polycarbonate and clear polystyrene plastics are among the few surfaces on which to avoid using WD-40.

Show me the facts.

Already been done, thats why

Submitted by assassin on

Already been done, thats why they have the disclaimer on their site now, on the newer cans it clearly states it protects steel and nothing else.

Nobody is arguing because the makers agree it happens, but it has caused numerous issues with electronics now common on many cars by people annually spraying them to protect from corrosion. Take a look on any of the newer cans and you can see it for yourself.

Shifting the goal posts

Submitted by x on

Assassin,

Firstly, where is the disclaimer on the website you stated. You now say it has apparently gone from the website but is on the can. Which is it?

Secondly your stance has changed from WD40 causing corrosion to electrical connectors and copper to "causing numerous issues with electronics". It's all a bit vague now and you are blurring your original issue.

I agree wholeheartedly regarding not using WD40 on electronics, but it isn't because of the reasons you lead others to believe. Electronics have delicate insulations and lacquers and WD40, as indeed any petroleum based product, will most likely not be good for it. It isn't causing corrosion, but rather it could damage the other non-metallic products.

Your original stance was that it causes corrosion. WD40 does not cause corrosion - fact. It was designed to prevent corrosion and to say otherwise is incorrect and telling others that is unhelpful.

Show us the facts. I am willing to stand corrected. I have made errors on this forum before and I have always accepted the correction willingly.

Regards

No stance has changed, the

Submitted by assassin on

No stance has changed, the main issue was about a fuel injector problem which could have been something as simple as someone spraying it with WD40 which is known to corrode copper and has been acknowledged by its manufacturers, they also put a disclaimer on their website about this. Fuel injection wiring is electronic and not electrical and often uses resistance for feedback circuits to hold an injector open for a pre-determined time using the electronic trigger, hence my original reply not to use it on electronics or electrical circuits containing copper.

Certain electrical circuits such as lighting doesn't use copper, many such as back light clusters now use pressed steel which is coated, usually with a coating called Zintec, WD40 is beneficial as it protects the steel and coating in such electrical applications, so can be used for this.

Looking at my data sheet for WD40 - "WD40 is not recommended for use on a number of non-ferrous metals as it can cause a surface reaction with metals containing copper or copper coatings". Your previous synopsis for plastics is also mentioned further down.