I have a very similar problem. C16xe Poor starting & idle, misfire under acceleration when warm.

What is vss and what does the speedo drive have to do with it as my speedo cable if F*cked??

Cheers

There doesn't appear to be any wire from my gearbox that would suggest any use other than reverse light??

I bought a new Speedo drive (part number: 90375764) but again, doesn't look like it would have anything to do with the VSS. I've been told, but by someone with a different engine setup, that the VSS is on the back of the clocks above where the speedo cable attachs....not looked as yet.

Maybe headgasket blowing? Causing a misfire?

Is the misfire constant throughout revs?

VSS is screwed to the top of the gearbox, under the speedo cable.

Any other info needed, please post and I'll provide what I can....

[Edited on 31-05-2007 by Teknologikal]

Well I passed MOT on default today (emissions failed her on last run) thank god....there's no such reference for a 1.6 8v Corsa so nothing to check against so they passed me! Just scraped through on the default emissions :D

But, all this has done is buy me time and the means to get this car to and from wherever I need to take her to get this misfire sorted out. I may decat her for now to see if that makes any difference. She's worse when warm but something is definitely not right. What is confusing the issue is that I got people on one hand saying "Can't be the cat being blocked" or "Has to be the injector". There's a lot of back pressure when you take off the oil filler cap but the engine has had a compression test and is nigh on perfect. As I mentioned before the injectors were serviced and found to be working fine.

To clarify matters for those that have done the C16SE transplant before that may be able to help.....

I kept everything bar the ECU and engine. The engine had PAS so I had to remove the pump and the bottom/centre pulleys from the C16SE and I transplanted the bottom pulley and alternator from the C14SE onto it so I could fit the v-belt. Didn't change the engine loom since everything bar the ATS had a home (ATS was plugged into the inlet trunking instead).

She was running fine until recently when she started missing. In my previous post I explained the measures I took to rectify the problem at great expense ie. new CTS, ICV, Lambda, leads, plugs, coilpack, TPS, ECU and new fuel filter.

I really need to get this problem sorted before it gets any worse or causes damage. Symptoms are: hesitation when you open her out, lumpy idle, misfire (for the mostpart when warm), NO EML illumination and only ever one fault code produced (Error 24 No Speed).

So, could a blocked cat make an engine misfire? Also, where is the VSS in a standard Corsa SRi 1.4 8v (bearing in mind all that was changed was the engine and ECU).

[Edited on 31-05-2007 by Teknologikal]