Hey guys, had a misfire on the car (cylinder 1 with a wet coil) changed coil and cleared fault, jumped in the car this morning and it struggled to start,then until warm the car misfires, coils were connected exactly like the old ones, any ideas? I've currently got the battery disconnected to try and reset the ECU that way while I'm parked at work
Technical misfire issue
- Thread starter nikkiy9
- Start date
Currently reading:
Technical misfire issue
Resetting the ECU won't help.
You need new leads. A little silicone grease at the coil and plug ends won't hurt either.
It's unwise to change one coil pack at a time on Mk2 Puntos (or early MPI Seis) as it can lead to ECU damage.
Although -- mysteriously -- the coils can fail leading to a misfire on only one cylinder, it's fairly rare.
You need new leads. A little silicone grease at the coil and plug ends won't hurt either.
It's unwise to change one coil pack at a time on Mk2 Puntos (or early MPI Seis) as it can lead to ECU damage.
Although -- mysteriously -- the coils can fail leading to a misfire on only one cylinder, it's fairly rare.
Don't understand wet coil. If a plug has been misfiring it will generally be fouled and need cleaning if not replacement. A new coil won't clean it. If you haven't already I would pull them to check the colour.
How's your coolant level holding up. Slight misfire at cold idle can be an early warning of headgasket trouble.
How's your coolant level holding up. Slight misfire at cold idle can be an early warning of headgasket trouble.
Both coils were actually changed, cool and is dropping per 1000 miles, I've not had a chance to check the plugs but ill try tomorrow (no time today unfortunately) and good thinking about the HT Leads, will get new ordered today
- Joined
- Apr 8, 2008
- Messages
- 16,742
- Points
- 3,187
Eurocarparts did a set of leads for just £10 the other week
And Spark plugs @ £2.22 ea
If both coils are okay, then try spark plugs and HT's
But misfires can be all sorts from
flooded cylinders
poor compression
a mis-gapped valve - but that wouldnt clear actually when warm
But eitherway
if HT's and Sparks dont cure, i'd be inclined to have
A compression test
A Coolant pressure test
An emmissions readout to see whats happening
Ziggy
And Spark plugs @ £2.22 ea
If both coils are okay, then try spark plugs and HT's
But misfires can be all sorts from
flooded cylinders
poor compression
a mis-gapped valve - but that wouldnt clear actually when warm
But eitherway
if HT's and Sparks dont cure, i'd be inclined to have
A compression test
A Coolant pressure test
An emmissions readout to see whats happening
Ziggy
Change the leads first. Plugs last fairly well. If they don't sort it, get back.
