Is this a straight swap or is there other mods to be done to fit a 1.4 throtle body on a 1.0 mk3

Bolts straight on. You may have to add the Polo cable mount, which just screws into the spare hole on the casting, and swap the cable quadrant, if it's from a Golf, as the cable comes in from the front. I'd try both injectors to see which feels the best.

I still haven't tried the 1.0 injector on the 1.3/1.4 (i'm guessing 1.4 golf as I had to swap the cable quadrant) throttle body you sent me. My fuel economy took a noticeable hit, but then I realised it pulls better with less throttle so after a week or so adjusting my driving style I've only lost 2 or 3 mpg and the car does go a fair bit better.

I just fear that it would be running too lean with the 1.0 injector?

Edited 27 June, 200719 yr by tobyk

Hard to tell without a wideband lambda. I think I've got a 1.0 injector in my 1.8 TB. I've only got a 1.0 and 1.8 injector here as the 1.3 one went with the last 1.3 TB I sold. I have a wideband kit, but I didn't drill the hole in my downpipe big enough to take the sensor. I'll be opening it out this week though.

So what do you do with the wideband lambda, drill the hole and tap it then it screws in? Is it a permament fit, or do you block the hole off with a ground off bolt or something?

Seen some wideband lambda kits pretty cheap on ebay. Will be interesting to see how you're doing with the 1.8 TB + 1.0 injector.

I've already got the standard lambda, but it fits through a 13mm hole, which must have been the biggest drill I could find when I modifed the downpipe to fit the Golf. The wideband, Bosch LSU4.2, is 16mm. I've got the Innovate LC1 controller but in some ways I wish I'd got the Techedge instead as it datalogs Lambda, RPM, throttle angle and a couple of temperatures too. It can be a permanent fit, but the sensor isn't cheap over here and only does 30K before it's knackered. I'm only going to use it for diagnostics and tuning my Megasquirt. Once tuned, the Megasquirt can be run open loop so doesn't need the lambda.

Ok so I just swapped my 1.0 injector into the 1.4 throttle body. Been for a drive and am not happy with it, it doesn't pull very well at all, in any gear. I'll run it for a couple of weeks to see what the economy difference is, otherwise the 1.4 injector is going back on!

Still haven't tried the 1.8 throttle body actually, must have a look for one to see how that is.

Just been speaking to my dad and apparently he has a Bosch LSU4, but no controller. Shall have to look for a controller

Edited 27 June, 200719 yr by tobyk

why have you had to change the lambda? I'm running a polo ace chip, 1 litre injector, late spec 1300 mk3 polo throttle body and inlet manifold and the car runs fine, idles normally, pulls smoothly and is a deffinate improvement over std certainly worth the 40 quid i have spent on parts

The standard item is a narrow band, so doesn't really tell you what's going on. I got the wideband because I'm going to be playing with bike carbs and then a megasquirt. It's just a diagnostic tool really.

The standard item is a narrow band, so doesn't really tell you what's going on. I got the wideband because I'm going to be playing with bike carbs and then a megasquirt. It's just a diagnostic tool really.

bike carbs on a 1 litre!what bhp you hoping to achieve? bet it will go well

No, bike carbs on a 1.4, the other guy has the 1.0, although it would be interesting to make a high compression, high revving wild 1.0. Be quicker to put a bike engine in really.

Well, I've just been fiddling about with the timing and I've got it running the way it was before I swapped the injector so I'm happy. Drives very well considering the fact it's a 1.0!

Good luck with the bike carbs as well