Jump to content
tom01997

1.0 AUC evasive misfire problem.... (Lupo)

Recommended Posts

tom01997

Happy new year all - I wonder if anybody here is knowledgable on the AUC engine as fitted to my 2003 Lupo, as I am at a total loss as to what is wrong with mine. A month or so ago it started misfiring.


I replaced with a brand new ignition coil, HT leads and spark plugs to eliminate potential spark problems. The misfire remained.

With the engine running, unplugging injector 1 does not change the idle. Nor does unplugging the HT lead. So the issue is on cylinder 1.

 

I swapped the injector on cylinder 1 over to cylinder 4. The problem stayed on cylinder 1, so the injector is not at fault.

I ran a compression test, and all 4 cylinders sat at 125/126PSI, so it has compression.

 

I read somewhere that the ECU looms can fail and short out, so I began hunting for a Lupo to have a loom off.

Yesterday, I found a Lupo with an AUD engine (very similar to AUC) in a local breakers yard, and had the injector loom & fuel rail with injectors off it (same part #), as well as the loom as it runs to the ECU.

 

Today I fitted the replacement injector wiring loom. The misfire remained on cylinder 1.

I then fitted the replacement fuel rail & injectors. No change.

 

So, I removed the battery to inspect the wiring which runs underneath. I connected the battery to the terminals using a pair of jump leads. By wiggling the wiring loom, I hoped to isolate any wiring issue.

But when I fired it up, it cut out after a second, as it would if I had an immobiliser issue. Even after putting the battery back in, it still wouldn't run.

 

So now, instead of having a misfiring Lupo, I have a non-running Lupo. 

Having spent a small fortune on air suspension this (last) year, i'm pretty gutted I can't get it running again.:-o

Any ideas as to what might be wrong with it would be greatly appreciated. Thanks.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Terms of Use Privacy Policy Guidelines