Hi
I have a question re my sons 2004 1.2 8v Punto, the issue started with an occasional misfire but has now progressed to a permanent one, it's missing on cylinders 1 & 4, I read plenty of posts about possible causes and so far have changed the plugs and leads, and done a compression test (all good), i've substituted another coil and swopped them round on the car, i've also checked/wiggled various wires/connectors to no effect, i'm thinking ECU but am slightly uncertain. I tried the coil/ecu test documented on the forum but found I was getting a very dim light on the test lamp on the suspect coil when the negative switched, I've also tried a set of spark plug testers ( the ones that fit between the plug and lead and light up) and these confirmed a good spark on 2 & 3 and what appears to be a very weak spark on 1 & 4, would an ECU failure show up like this or should I be getting nothing at all on the offending cylinders, I've seen adverts for plug and play ECU's on EBAY and I've seen an advert via a forum link to ECU Testing, if it's what the car needs then fine but I wanted to be sure before spending the money, does anybody have any ideas? Thanks Steve
I have a question re my sons 2004 1.2 8v Punto, the issue started with an occasional misfire but has now progressed to a permanent one, it's missing on cylinders 1 & 4, I read plenty of posts about possible causes and so far have changed the plugs and leads, and done a compression test (all good), i've substituted another coil and swopped them round on the car, i've also checked/wiggled various wires/connectors to no effect, i'm thinking ECU but am slightly uncertain. I tried the coil/ecu test documented on the forum but found I was getting a very dim light on the test lamp on the suspect coil when the negative switched, I've also tried a set of spark plug testers ( the ones that fit between the plug and lead and light up) and these confirmed a good spark on 2 & 3 and what appears to be a very weak spark on 1 & 4, would an ECU failure show up like this or should I be getting nothing at all on the offending cylinders, I've seen adverts for plug and play ECU's on EBAY and I've seen an advert via a forum link to ECU Testing, if it's what the car needs then fine but I wanted to be sure before spending the money, does anybody have any ideas? Thanks Steve