Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Heyyyy youuu guyyys !!! Just wondering .. im off to my local scrappy tommorw and i was wondering if anyone knows how to remove the throttle body and a fuel injector on a 1.6, 1.8 or 2.0 eight valve SPI engine(astra ,cav etc) !!! im going down the scrappy and im gna get a inlet manifold, TB, and fuel injector from an astra or cav with a slightly bigger engine than my 1.4 .. i was just wondering if its a simple fix? .. i know i must keep to 8 valve SPI lump components ..and probably no bigger than 1.8 items !!!Is the the throttle body and injector just a bolt on job like the manifold ?... will i have to run 1.6/1.8 software? JW as im looking to get some more simple engine spanner experience !!!! Although im not looking at great BHP gains at all with these mods..just be summink cool to write on a spec list for cheap mods !!! cheers fellas ( and any ladies ) !!!

Oh and one more crazy question ...would the vauxhall nova /corsa 1.5 Turbo diesel manifold bold straight onto an 8 valve jobby like mine ??? I doubt it ..But that would be cool tho !!!

I would imagine a 1.6 SPI unit would fit not sure about the 1.8 If youe can get hold of the manifold gaskets for each put them on top of each other aslong as the bolt holes line up and the port holes are all centered then they will be fine.

As for removing an SPI unit and manifold it explains it all in the haynes manual if you don't have one you should get one. but to be honest you can figure it out easy enough. Just remember you will need a new manifold gasket and if you seperate the TB from the maifold you will need a new gasket there and also if you split the TB you will need a new gaket for that. easier if you leave it all together when you remove it and refit but there probably won't be enough room.

Diesel manifolds won't go on petrol im guesing you mean exhaust manifold for the turbo as the inlet would be useless. you may be able to chop the 1.5TD and a 1.4 maniflods and weld them together to give your 1.4 a turbo but I have no idea if this can be done just a thought.

If I had your engine and was thinking of performance upgrades I would look at the C14SE engine as that is basicaly the same engine but with MPI and an extra 20BHP. Swopping an SPI to MPI should be straight forward if you bring the engine loom and ECU with it, but I don't know ive never done it, It might be easier to do the whole engine. One problem in putting MPI on a X14SZ is that the C14SE has a less strict emisions test so when it comes to the MOT it might fail on emmisions.

Thanks man ....Yeah..i do have a haynes manual ...nd i figured out how to do it all n that...i took the 1.8 throttle body and injector from a cavalier 1.8 GLS ....Bad mistake ..... i bolted it on and it was fine i started the car up and it ran really poo and my throttle cable was not as tight .........i planted my foot to the floor on the test drive and it coughed and splutterd like mad ... only good thing was .. it sounded amazing..lol ...i took it off and replaced it for my original one .. im gna do some more research.. cz the cav was a 1.8 .. thats fine but ....my x14sz ..is obviously different ..The cav was well old so it was probs due to its different set up eg (c18 ??) .......Did vauxhall make an x16sz ,x18sz and x20sz /??????? ... cz if they did i think this would be better ....although do you think if i put the 1.8 cav throttle body and injector onto the matching manifold and THEN bolted it to my car it would run any better..or if the 1.8 inlet manifold dont fit , then maybe the 1.6 ???????????? cheers !!!

There may be a problem with the sensors on the older throttle body the TPS and idle control motor but I don't know you could try the 1.8 manifold with the 1.4 TB with a 1.8 injector. Or try the 1.8 setup with TPS and idle control motor from the 1.4.

I know that the X12SZ and the X14SZ were only used for a short period before the 16v engines were introduced, which makes them rare. As for X16SZ they are even rarer you might find one in a astra of cav 93-96 but i think they might have only been used in opels an not vauxhalls so german ebay might be your best bet.

I don't think there is a X18SZ

Ahh i c....On the throttle body ..... the cable will pull the arm and the butterfly opens ..on the other side of the throttle body .. it turns inside a small black unit ... is this the TPS ???
Can you explain what the Idle control motor looks like ??? The bloody TB and injector cost me £20.. so i'm gna take it back .....BUT.. i wont if i know i can get away with Chopping and changing the setup a bit ... im gna purchase a 1.6 or 1.8 manifold and see what set up can work with those .Iv'e seen an astra MK3 with a spec list as follows : c14?? with c16?? Inlet Manifold , c18?? Throttle body and Injector!! His car made 17bhp up on standard ...If i return the TB and injector unit i may look for the 1.6 manifold ...and tb nd injector and the same with 1.8 set up and mix it all up to see what runs the best etc lol ... cheers fpr your help haydn1987 !!!

Hi mate I think your best best is to just experiment with different parts.
Mines all stadard so I'm not sure what will work, yes the TPS is a little pastic thingy with wires coming out of it on the left of the TB, the ICM is on the other side by the throttle linkages. It slots into the side of the TB its black and plastic with a few wires coming out of it, it pushes down the accelerator abit to stop the engine from stalling.
I don't know if these are different but its something to check out.

one last point the X14SZ has an EGR valve i don't think the C16 or C18 had EGR's what did you do when you fitted the C18 inlet did you block off the EGR.

I have heard of these EGR jobbies but the only thing i could see different was that the duct work prior to entering the trhotle body ..on the cav one it was just a black box with one feed coming from the air filter ...but on mine i has 2 peices of duct work with a larger box ..i couldnt work out what this was .... where is the EGR valve located ???? next time i purchase some things inm gonna do some mixing and matching to get a set up that runs well but maybe free's up a few horses 2 !!! Yeah im gna go home and do some checking tonight ..... i took the TB and injector unit back and they refused to give me my money back but gave me £20 worth of credit to spend there lol !!! so im gna c about some 1.6 components... !! oh and also ...is there anyway of testing the TPS to see if its duff or not ... lol i have an idea of how i could do it ..i work as a sparky so i think i could use my tester and test the resistance of it maybe ??? cheers !!

My bad the C16 and C18 have EGR valves the C12 and the C14 don't so as long as you connected the it all up the same then it should be fine.
EGR is bolted to the intake manifold infront of the TB and has some wires coming out of the top its not realy needed and you can by blanking plates from ebay.

The TPS is just a variable resistor so if you get a multimeter set it to measure resistance conect it up and the resistance should change as you push the throttle.

AS for the extra ducting on the X14SZ that is the secondary air injection system. From what ive read its only used for a minute or two when you first start the engine to help it warm up, I think its blows warm air from the exhaust or maybe exhaust gases im not sure into the air intake.

When swapping parts over just make sure that everything connects up the same as the old one don't leave anything off and if the new part has extra tubes or fittings make sure theseare completely blocked off.

ahhh ic .. i thought that thing with the wires coming out the top was my idle control jobby!! yer so mine has an EGR and so does the c18 so this sould cause no problem ....so now i know what the EGR is and the TPS ..so what and where is the idle control????? Yeah on the 1.8 injector i had an extra fitting for another pipe or sumting but was onlky tiny so i can only assume was a vacuum pipe !!!!yeah so im gna test my TPS and check out all different set ups using different parts and taking away different parts lol!!!

Picture shows the idle control motor sory if its a bit small.

All unused vacume pipes have to be blocked or they will suck in air and your engine will run badly