So starts from here.

Every time I drive about 60-70mph and stay at that speed for about 5 mins my engine Management light flashes for about 15 seconds then goes off.

I have plugged a diagnostics machine in and the codes are:

P0300
P0301
P0304

Looked them up and comes back as misfire.

Car has done 46,000 Miles and is a 1.4 8v Active Sport 2007

Had the plugs changed about 4,000 Miles ago.

Whats the best step to take ? and what does anyone advise to do ?

Thanks Guys

Jonathan

When was the cambelt done?

Were the self-adaptive parameters reset afterwards?

This is what i'd do, as it seems your armed with a reader ??
Swap the coil packs from Cylinder 1 and cylinder 4, to 2 and 3.

If you then get P0302 and P0303, then you've determined it's the coil packs.
This will take about 10 minutes tops.

D4nny8oy said:

When was the cambelt done?

Were the self-adaptive parameters reset afterwards?

Click to expand...

hasnt been changed yet mate

keat63 said:

This is what i'd do, as it seems your armed with a reader ??
Swap the coil packs from Cylinder 1 and cylinder 4, to 2 and 3.

If you then get P0302 and P0303, then you've determined it's the coil packs.
This will take about 10 minutes tops.

Click to expand...

.

ill ive that a go!....will that do anything like make it misfire on tickover or anything or?

I have the exact same problem after a recent cambelt change,i have full reg multiecuscan.can anyone tell me how i do a reset and wheel relearn on a 1.2 8v.i. have read on this forum about reving to 5000 x 3 etc but unsure on exact procedure,thanks

keat63 said:

This is what i'd do, as it seems your armed with a reader ??
Swap the coil packs from Cylinder 1 and cylinder 4, to 2 and 3.

If you then get P0302 and P0303, then you've determined it's the coil packs.
This will take about 10 minutes tops.

Click to expand...

how will that help he has a misfire on cyl 1 and 4

the 1.2 uses a single coil pack unfortunately

check the leads are not damaged the plugs on the caps for those 2 spark plugs are a crap design ..

but it does seem to be coil related...


http://www.shop4parts.co.uk/?name=store&op=details&ProdId=2826&sku=41250

less 10% for donated members


worth removing the coil pack (battery off 20 mins before hand) ELECTRIC SHOCK RISK

bit more help to show you how to get at it
https://www.fiatforum.com/grande-punto-guides/237966-1-2-8v-evo-2-engine-cam-belt-replacement.html

Andy Monty said:

the 1.2 uses a single coil pack unfortunately

Click to expand...

You live and learn

keat63 said:

You live and learn

Click to expand...

Fiat love to confuse matters older fire engines used 2 coils. The 16v uses individual ones

Andy Monty said:

how will that help he has a misfire on cyl 1 and 4

the 1.2 uses a single coil pack unfortunately

check the leads are not damaged the plugs on the caps for those 2 spark plugs are a crap design ..

but it does seem to be coil related...


http://www.shop4parts.co.uk/?name=store&op=details&ProdId=2826&sku=41250

less 10% for donated members


worth removing the coil pack (battery off 20 mins before hand) ELECTRIC SHOCK RISK

bit more help to show you how to get at it
https://www.fiatforum.com/grande-punto-guides/237966-1-2-8v-evo-2-engine-cam-belt-replacement.html

Click to expand...

Well, I've unplugged all leads give them Bit of a clean and then plugged back in. Then did that relearn thing where you take it to 5,000 rpm ect ....and I think I have fixed it !!!! It hast came back on yet !!! Early days yet though!