Which injector inserts and seals for a '90 DX engine?

I have a 1990 GTI Cabriolet with a 1.8 DX engine.

I want to ask my mechanics to replace the injector seals and inserts. I've said I'll provide the parts but I'm confused by all the different injector inserts and seals available.

Can anyone tell me what I need for a belt n' braces job, please?

Thanks!
 

If you have a black rubber pipe from near the throttle body going to the back of the head between cyinders 3 and 4 then you have the air shroud injectors (most likely have these as later car)
You need these type of seals
http://www.ebay.co.uk/itm/VW-GOLF-MK1-CABRIOLET-GTI-MK2-GTI-16V-FUEL-INJECTOR-SEALS-x-8-C933-/221233249484?fits=Model%3AGolf&hash=item3382877ccc:m:my6c1ua_1cHmQldQ-NP_UsA

Insert I would leave alone as they are a sort of plastic which has been getting hot and cold for many years and they are properly very brittle, I removed mine when the head was off the car and lots of bits fell of them so if the head is still attached to the block all those bits will fall into the engine.

I believe you seats should look like this but not 100% sure, this is the type fitted to my 1988 cabriolet
http://www.ebay.co.uk/itm/VW-Golf-GTI-MK1-MK2-1-8-16V-Corrado-Lower-Fuel-Injector-Insert-035133554-/151567468047?hash=item234a20060f:g:UG4AAOSw-W5UxoFz

This is what I was left with when I removed mine and a couple of them I had to push from the bottom which is not possible with the head on the car?


New ones fitted.


Air shroud air feed at back of the head.


 

Brilliant. Thank you again.

I'm less concerned about fitting the new seats but the guy at the garage muttered something about them being all brittle and likely to break so I thought it'd be worth giving him a set just in case, if only to keep him happy! The main thing is to replace the seals – I'm still trying to get to the bottom of the slight hesitation in acceleration.  

The ones I removed was the original VW ones and apart from a very very small chip at the end of one of the seats which would make no difference to the running of the car.
The only reason I took mine out was because the head was being refurbished and cleaned and they had to come out and you see what was left of them
I would recommend leaving them alone and just replace the seal as you may be making more trouble/expense for your self.

Just read you other post about running problems, may be worth to get the garage to check the spray pattern, amount of fuel and any leaking injectors while they are out for new seal as the injectors might be your poor running problem.

Yes, that's the plan. I really don't know about the running issue. It runs fine at high revs, it just feels a little hesitant accelerating from a near standstill, kind of like there's a lag. I've got a 1.8 digi mk2 GTI and it is much more responsive, which is what makes me think there must be something up somewhere. I guess it's just a case of working through the possibles.

If it is the injectors, what's the best place for replacements? I see that VW Heritage sell them, but are there alternatives?

Yes I would replace them but if it's these from VW heritage I'm not sure they fit and they are expensive, I think I paid £25 each NOT £54 last time I bought some but it was a few years ago.
https://www.vwheritage.com/shop/golf-cabriolet/049133551A/fuel-injector-k-jetronic-engines-mk1-golf-scirocco/?crumbStartPage=1&crumbStartRow=1


Pictures/links for info, I would not buy 2nd ones if possible but the later type seem to hard to find at the minute but Ive not spent much time looking.
See what the garage says and go from there.

Early type with out air shroud.
http://www.ebay.co.uk/itm/VW-GOLF-MK1-CABRIOLET-SCIROCCO-STORM-FUEL-INJECTOR-VALVE-BOSCH-049133551A-A888-/191630779767?fits=Model%3AGolf&hash=item2c9e15a577:g:PYEAAOSwDNdVo8rn

Later type with air shroud,you can see the cap on the end and it's missing the other seal need.
http://www.ebay.co.uk/itm/VW-MK1-Golf-Jetta-GTi-Audi-80-K-JET-injector-049-133-551-A-049133551A-/282044347020?fits=Model%3AGolf&hash=item41ab27328c:g:NVkAAOSwPe1T2QIO
 

These are the ones on VW Heritage. It says they suit the '84 - '93 DX engine. Pricey!

https://www.vwheritage.com/shop/golf-cabriolet/026133551/fuel-injector-mk2-golf-jetta-corrado-1800-16v/?crumbStartPage=1&crumbStartRow=1

Those are the some ones fitted to my 1988 DX car.