XJ40 ( XJ81 ) 1986 - 1994

Cleaning the Fuel Injectors...?

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Old Jul 13, 2011 | 08:34 AM
  #1  
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Default Cleaning the Fuel Injectors...?

Alrighty!!.

I got the gas tank pulled, emptied and cleaned.
I got a new fuel pump in place.
I flushed and backwashed the filter.
BUT....

No start...

Im getting air, Im getting spark and compression..... when I use a little starting fluid, it tried to start for a moment.
So, Im guessing the Fuel Injectors might be clogged.... all six??.
(which is possible thinking about it).
I had a quick look at one the other day and saw a white crusty substence (almost like calcium) around the inlet side.

So... I think its time to build a rig and make an attempt to clean and flush the injectors (can of carb and choke cleaner standing by).

Any other thoughts??
 
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Old Jul 13, 2011 | 09:23 AM
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Sounds to me like you're on the right track.
I had roughly the same situation while trying to bring my '90 Sovereign back from the dead. My homemade rig got 4 of the injectors clean & functioning, but 2 were DOA.

Here's what I built with some wire, alligator clamps and a large generic horn button from the auto parts store.
I used extra wire length and the big button so I could activate it with my foot, figuring both hands would be busy with injectors, spray cleaner & etc.

Not too pretty or cutting edge, but it worked great!
Good luck ... let us know how it goes.
Retro

EDIT:
Oops ... almost forgot!
The injectors have full-time 12 volts, and are activated by the ground, so I put my button in the negative wire.

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Last edited by retromotors; Jul 13, 2011 at 09:30 AM.
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Old Jul 13, 2011 | 09:27 AM
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Or you can send them to houston to Fuel Injector Cleaning Service : Injector Cleaning Service : Injector Cleaning : Clogged injectors : InjectorRX.com and have them flow tested before and after. Cleaned. Basket screens and orings replaced all for about $18 each
 
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Old Jul 15, 2011 | 01:16 PM
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Well... I grabbed some pics.
But Ill post em later. I got one more to take.

Pulling the injectors from the rail and intake the problem was obviouse.
Lots of gunk and calcium in the injectors.

So, Using a few wires fuel line and my trusty compressor I madea quick attept to backwash one.... FAIL!
A good soaking in cleaner, then a few smacks with a hammer and try again....
It took a little work but one at a time, I got them working.
The issue I found was that the injectors need more than just a few PSi to work. Luckily my compressor goes upto 120PSi, but I found that I can only hold the pipe on the injector to about 12PSi, then it wants to pop off. But that was enough to backwash, and clear them.
I strongly suggest wearing somekind of glasses while cleaning them though.... ;-P

Pics later.....
 
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Old Jul 15, 2011 | 05:56 PM
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Well, after some testing....
:-(

Fail....
While I did manage to clear out some of the crud, I cant get it clean enough to do more than dribble a little gas.
Looks like Im gonna have to spend the $$$ and get 6 new ones. Eek.
 
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Old Jul 18, 2011 | 04:39 PM
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So today I started up my Jaguar.... :-)

I took my injectors off to a place to get cleaned.
Anyone in the tampa / florida area... I recomend BOOSTLAB.
Their web site is www.theboostlab.com

They got all 6 injectors working again. Unfortnnatly one of them had a damaged pin and wouldnt perform the same as the other 5. So they only charged me for 5 injectors.

So after that I cleaned out the fuel rail with some B12 and my air compressor. I managed to get all the rust out. Then installed a small clear performance filter on the fuel line before the rail so I could see when things were getting dirty, and also have a second filter between the fuel rail and pump.
 

Last edited by AdrianSw; Jul 19, 2011 at 06:47 PM.
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