2.0 Mi16 Running Rough

[fila1223 1]

Hi

For past half of the year i was trying to diagnose my engine but with no luck.

Basically car struggles to maintain idle and revs with great effort to, and exhoust smells of unburned fuel.

I'm getting spark everywhere and lamba was replaced recently, but i discovered that engine is running smoother on 3 cylinders when i remove first coil from gearbox side.

Does anyone have any idea what is going on ? I'm seriously running out of ideas.

[welshpug 1,657]

is the map sensor pipe intact?

 

done a compression test?

[fila1223 1]

compression 12,5 bars on each cylinder

map sensor is sealed

i wasn't able to find any vaccum leaks either

Edited March 18, 2017 by fila1223

[hoodygoodwood 70 3 Cars]

Its got to be worth fitting a new spark plug and coil to the cylinder closest to the gearbox , if it runs the same or better when that coil is disconnected the problem could be there .

[Tesstuff 222]

Check your purge valve.

[fila1223 1]

Its got to be worth fitting a new spark plug and coil to the cylinder closest to the gearbox , if it runs the same or better when that coil is disconnected the problem could be there .

Both new and it runns better when i disconnect a coil

And i don't have a purge valve, the donor car didn't had one

Edited March 19, 2017 by fila1223

[Tesstuff 222]

If the purge valve is missing, how is that circuit blocked off? I presume the carbon canister set up was removed at the same time, but how was it plugged?

[fila1223 1]

If that would be the case wouldn't it runn fine on cold engine ?

Motor runns the same when it's cold and warm

[fila1223 1]

anyone have some more ideas?

[calvinhorse 870]

Ignition amplifiers, try swapping them around or replace them

Passenger side inner wing area

[fila1223 1]

Ignition amplifiers, try swapping them around or replace them

Passenger side inner wing area

All ready tried that

I have spark on each cylinder and it still runns like crap.

Maby all of my amplifiers are bad?

Edited March 29, 2017 by fila1223

[calvinhorse 870]

Absolutely possible yes

 

How old is the fuel and fuel filter?

 

Mine always ran like crap on anything other than super unleaded

[fila1223 1]

Fuel is about 4 days old and filter is brand new

[calvinhorse 870]

I'm gonna 100% go with ignition amps if you're saying all 4 coils work?

 

Only other option is ecu which is unlikely but the map sensor is in the ecu but that wouldn't cause a misfire

[fila1223 1]

You know what, ecu might be the problem

I make vaccum with hand pump on map sensor and it runns better. It's not a problem with vaccum tube itself becouse i can see that vaccum isn't escaping on gauge. I tested other tubes for leaks but i couldn't find any

[fila1223 1]

So i guess it is't an ecu falt since i changed it and engine is running the same as before

[Mikey S 29 1 Cars]

Map sensor pipe collapsed internally?

[fila1223 1]

Map sensor pipe collapsed internally?

It's new

What might be a symptoms of bad cam position sensor ?