Has anyone used a cleaner - sprayed into the throttle body while engine running, shut engine off for 10 to 15 mins, then restarting - to clean out Ethanol deposits and gum and varnish residue?

Will this type of cleaning lead to a bore wash?

Thanks.

 

I tried this but it won't work as the computer is looking for data from the MAS sensor which is disconnected to remove the air cleaner tube. Use to do it all the time on old cars.

 

Thank you, that settles it then.

 

Yes you can and this link will show you how i did it.

Link JagRepair.com - Jaguar Repair Information Resource

 

There's no such thing as 'ethanol deposits' and it's very unlikely that there's enough of any other type of deposit that would affect performance or fuel consumption.

Save your money.

 

Thanks, Gus, but the cleaning I was speaking about was with foam being drawn into the cylinders with the engine running, then let it sit for a short while with the engine off, then starting the engine back up to burn off any deposits on the pistons and rings.

 

The very top of the page that Gus pointed at is the part you want to see
because the drilled hole allows injection while the MAF is active and in
circuit.

Of course, it might not suit the type of chemical you want to use, but it
does allow the injection of some cleaners while the engine is running.

If keeping your rings free is the goal, the routine addition of TC-W3
to your gas is likely a good bet. There are threads here and elsewhere
on that usage of TC-W3.

 

Really?

Guess you've never seen the pictures in multiple posts of gummed up throttle plates
and oil sludge sitting in the intake tract directly below the throttle plate from the
part and full load breathers.

Advising against what amounts to routine maintenance on these engines is just
plain bad advice.

 

I found using BG44K to the fuel once a year and cleaning the throttle body with throttle body cleaner as the engine is running has given me several years of good driving. When I removed my intake manifold because of a vacuum leak I was pleasantly surprised by how clean the valves and injectors looked and for that reason I continue to do what I have been doing. If that is what you are looking then I would suggest trying it.

 

The key is and it's very unlikely that there's enough of any other type of deposit that would affect performance or fuel consumption.

There is no recommendation from Jag to clean these components on a scheduled basis. They instruct specifically against additives. I'll bet not 1 in a 1000 owners uses these type of products and yet their cars run just fine.

If the OP's engine is running poorly then there is probably an underlying cause that needs to be addressed.

 

I can tell you that Jaguar Dealerships use a host of BG products along with BG44k.

 

Key word is 'dealership'.

 

Where is the citation for the prohibition against using additives?

Since that is one of your favoured responses to assertions, it shouldn't
be too much to ask for a fact check.

Furthermore, since when is a cleaner an additive? One is used on an
as required basis, while the other is used habitually.

As readers may suspect, I have a fairly comprehensive collection
of Jaguar documents. I can see no such cautionary note in any
of them. The sources I have checked for this posting are the
vehicle care manual, specifications booklet and the maintenance
sheet templates.

Readers might also remember that according to Jaguar the transmission
fluid and diffferential fluid are also maintenance free. They don't even
ask that their levels be checked at any scheduled service.

Neither do they specify that the partial and full load breathers be
checked or cleaned at any time.

Yet, experience on this forum suggests that the items in the precediing
two paragraphs should be considered normal servicing requirements.

That is the standard against which the reliance on Jaguar pronouncements
ought to be judged.

++

 

I hope to never have to get deep enough to see those parts

 

A cracked intake manifold courtesy of the previous owner using starter fluid to start the car.

 

Will this do you?

In the refueling section:


"Caution: No additives of any kind
(fuel or oil) must be put into the fuel
tank. Additives could reduce engine
life or affect exhaust emissions."

In the maintenance section:

"Caution: Do not use oil additives of any
type. Use only specified lubricants."

Straight out of the owners manual.

No further distinction is made between 'as required' vs. 'habitual', nor is special status attached to a cleaning product vs. one that might have some other purpose.

Perhaps you should step away from the edge before you fall off.

 

Well that is interesting seeing that Jaguar along with MANY other major dealerships use BG products along with BG44K and they have not been ostracized from society or the manufacture of these cars. It would not be the first time that a manual written was wrong.

I do understand the concerns of over usage or the usage of products that are just a placebo and the person that uses a good product incorrectly. But to say not to use any product is an injustice. You should do what is necessary to provide a quality driving experience.

I will take the stand and agree to disagree and will continue to use BG44K as recommended.

 

Second question of the OP. If a product such as Power Foam is sprayed into the throttle body with the engine running thus drawing the foam into the cylinders, engine then stopped for a short time for the cleaner to work, then restarted to burn off the deposits of the cylinders, rings and valves, will this type of cleaning cause a bore wash?

Thanks.

 

Agreed. If there was consistent evidence that the performance or economy of a car degraded over time due to contamination then yes, steps should be taken to correct the problem. I'm sure Jag would like to know about such things and possibly take remedial design action or at least initiate a scheduled maintenance task with approved products and procedures.

I don't believe there's such evidence so cannot see the point of using products to fix what's not broken.

The fact that a product is sold and promoted by a dealership carries no weight with me. I've never been in a dealership or car parts store that doesn't have an incredible array of such products or services. Most probably buying one bottle/box of each product would exceed the value of my car.