Misfire cylinder number 4.

[RichB]

Hi Guy n Gals.

Waiting for the AA to tow me home at the moment. Car started stuttering and misfiring in traffic after about 40mins if been fine on the motorway. AA guys computer says misfire on number 4 and at one point said injector. However I changed number 4 injector a few months back for a new one as it failed on me.

he checked and has taped up the HT lead to number 4 but still no improvement. Do you think new leads and coil pack would be the best place to start? If that doesn't work try swapping the injector to another one just to confirm it's not that? After that should I be getting a compression test and chasing the wiring?

cheers!

 

[bloke]

did you change no.4 or no.1? back to front don't forget.

also measure the resistance on the injectors, usually shows dodgy one up.

 

[Filters]

I had a misfire on injector number 1 the other week, turned out the clip for the injector wiring loom had wriggled itself loose ever so slightly causing an intermittent signal to the injector. Might be worth double checking the connections.

 

[Tony Hunter]

did you change no.4 or no.1? back to front don't forget.

also measure the resistance on the injectors, usually shows dodgy one up.

And which one is which?

 

[RichB]

Yeah I Made sure on here I changed the correct one (opposite to battery and intake) after I found out they're backwards.

 

[bloke]

And which one is which?

i missed that bit out as a test

 

[Kyle_]

Sorry this is of no help but Ive just had the same error. How much was a new injector?

 

[RichB]

I fitted it myself but the injector was £35ish + postage from renparts on here.

Spoken with my mechanic today who confirmed leads needing replacing (arcing) and replacement coilpack has sorted it so sorting out now with the AA to claim on the parts and labour warranty.