www.gt4dc.co.uk :: View topic - Fitting new fuel injectors

Mike,
1) the injectors if new are prone to being "sticky" use a 12v car battery and 2 pieces of wire to check they are working OK before fitting and to give them an initial kick into life. Just very briefly touch the injector terminals with the wires to open & shut them (you will hear a faint click). If you remember correctly when we fitted mine at K&Ls I had a sticky injector or 4 as they had been sat on the shelf for a while.

2) why not get the ECU fitter to install them - IIRC most places will charge around £75 to do this. You can't run the car with std ECU & 800cc injectors and you can't map your ECU until they are fitted if you intend on using them so they need to be done just before ECU is fitted. I don't see it being sensible to be doing this in the ECU Fitters car park.

Author:	Sirius [ Wed Jan 29, 2014 10:50 pm ]
Post subject:	Fitting new fuel injectors
Hi Folks, What if any parts will I need in order to replace the fuel injectors, are there any seals etc that should really be changed. The injectors I am fitting are brand new Sard/Denso 800cc items. Also - does anyone have a 'how-to' for doing this work with the engine in the car. Cheers

Author:	Diceman [ Wed Jan 29, 2014 11:12 pm ]
Post subject:	Re: Fitting new fuel injectors
See the sticky on part numbers mike replace all seals IMHO Employ the laziest person to do the most difficult job and they will find the most efficient way of doing it! I found that you can remove the fuel rail and twiddle it to replace injectors - circa 1 hour job Or remove fuel rail from engine like most will and it takes 8 hours hard graft. IIRC the chargecooler needs to be removed and the throttle body is much easier to remove.

Author:	two_OH_five [ Thu Jan 30, 2014 12:57 am ]
Post subject:	Re: Fitting new fuel injectors
Unbolt the loom from the inlet too iirc

Author:	Diceman [ Thu Jan 30, 2014 6:02 pm ]
Post subject:	Re: Fitting new fuel injectors
Mike, 1) the injectors if new are prone to being "sticky" use a 12v car battery and 2 pieces of wire to check they are working OK before fitting and to give them an initial kick into life. Just very briefly touch the injector terminals with the wires to open & shut them (you will hear a faint click). If you remember correctly when we fitted mine at K&Ls I had a sticky injector or 4 as they had been sat on the shelf for a while. 2) why not get the ECU fitter to install them - IIRC most places will charge around £75 to do this. You can't run the car with std ECU & 800cc injectors and you can't map your ECU until they are fitted if you intend on using them so they need to be done just before ECU is fitted. I don't see it being sensible to be doing this in the ECU Fitters car park.

Author:	Sirius [ Thu Jan 30, 2014 6:07 pm ]
Post subject:	Re: Fitting new fuel injectors
I'd like to confirm some of the new seals etc that I will need, this is what I have to date: The injectors are brand new and have 2 o-rings installed on each one. I also have 4 of the injector isolators shown in the photograph. Below is the diagram from the EPC which shows a total of 5 seals for each injector: Now I am pretty sure those circled in green are the seals that I already have fitted to the injectors, according to ToyoDIY the part numbers are: 90301-14006 No1 O-Ring for Fuel Injector x4 90301-17007 No2 O-ring for Fuel Injector x4 The gold/orange seal ties back to the part number I have for the seals in my photograph above: 23291-88480 Insulator, No1 Injector Vibration x4 That leaves the seals marked in red and blue which appear to tie back to the same part number of which there are 8 on the car, 2 per injector: 23291‑75010 Insulator, No2 Injector Vibration x8 Can someone check my working please and confirm that what I am missing is the 8x 23291‑75010 Insulator, No2 Injector Vibration seals which are the ones marked by the red and blue. Fortunately TCB list these and they are 0.79p +VAT Cheers

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Author:	Sirius [ Thu Jan 30, 2014 6:16 pm ]
Post subject:	Re: Fitting new fuel injectors
Diceman wrote: Mike, 1) the injectors if new are prone to being "sticky" use a 12v car battery and 2 pieces of wire to check they are working OK before fitting and to give them an initial kick into life. Just very briefly touch the injector terminals with the wires to open & shut them (you will hear a faint click). If you remember correctly when we fitted mine at K&Ls I had a sticky injector or 4 as they had been sat on the shelf for a while. 2) why not get the ECU fitter to install them - IIRC most places will charge around £75 to do this. You can't run the car with std ECU & 800cc injectors and you can't map your ECU until they are fitted if you intend on using them so they need to be done just before ECU is fitted. I don't see it being sensible to be doing this in the ECU Fitters car park. Hi JP, Yes I do remember much confusion over your injectors when fitting them originally, I will be sure to 'liven' then up before putting them in. On number 2 I have been deliberating this as you say they need to be installed just before the car is mapped. Potential solutions I came up with are: 1) Pay them to install the injectors - simplest. 2) Fit the injectors in the car park, not ideal, never done it before, risks if I can't get the work done in time. 3) Fit the injectors at home and then have the car trailered up, lots of cost, cheaper options not available mid week, its a real bugger loading up cars unpowered. 4) Fit the injectors and have them send me the ECU with a basemap suitable for 800's on it so I can drive gently to the tuners, far too many risks imo. So I think I will just have the tuners install the injectors first thing when I get there. Cheers

Author:	Nibbles [ Thu Jan 30, 2014 7:41 pm ]
Post subject:	Re: Fitting new fuel injectors
If you have an AFR gauge fitted then it's not difficult to do a 'get me the tuners safely' map. We did this on Terrys G4 and ended up driving it up to Brum from Southampton services as his transporter was having injector problems. I tweaked the timing on the installed base map to be a bit closer to the stock ignition map, and set the fuelling in about 10 miles of dual cabbageway and minor road. The link base map is a joke, but it did at least get the car started so i could tweak it.

Author:	Nibbles [ Thu Jan 30, 2014 7:42 pm ]
Post subject:	Re: Fitting new fuel injectors
p.s. What ECU are you planning ? and which tuner ?

Author:	Sirius [ Thu Jan 30, 2014 8:16 pm ]
Post subject:	Re: Fitting new fuel injectors
Nibbles wrote: p.s. What ECU are you planning ? and which tuner ? Hi Chris, Not finally decided yet but will have an update tomorrow.

Author:	Diceman [ Thu Jan 30, 2014 10:35 pm ]
Post subject:	Re: Fitting new fuel injectors
correct:- St205 Injector Insulator (rubber O ring - 2 per injector) 23291-75010 £0.46 ST205 Injector Insulator 23291-88480 £3.94 http://gt4dc.co.uk/forum/viewtopic.php?f=2&t=2388

Author:	Sirius [ Thu Jan 30, 2014 10:42 pm ]
Post subject:	Re: Fitting new fuel injectors
Thanks

Author:	Sirius [ Fri Jan 31, 2014 2:31 pm ]
Post subject:	Re: Fitting new fuel injectors
Parts ordered today, thanks for the assistance.

Author:	martinking6 [ Sun Feb 09, 2014 5:39 pm ]
Post subject:	Re: Fitting new fuel injectors
Hiya mike Injectors I like to send away as had a few ones with quite some flow differences and even improved new ones so maybe worth doing even if just for piece of mind Martin

Author:	Sirius [ Sun Feb 09, 2014 6:17 pm ]
Post subject:	Re: Fitting new fuel injectors
Hi Martin, Thanks for the tip. I already had these new ones flow tested when they arrived This showed that they actually flow 860cc rather than the 800cc advertised

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