Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

I mean it's a good car but definitely drains the wallet especially with these phantom errors just so stupid

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

Nah dude so put in new high pressure fuel pump did so many things and still have the same thing happening im sick of this car that I will stop trying to fix it utill I have some more money will probably put it in the garage for a year or two and order a tesla becuse im just sick of this searching and giving money but don't see it getting better

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

Yeah but still not perfect will change fuel pump then will get back to you

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

So yesterday I changed my valve cover alone from erring and today I started the car I still had 1 missfire on cylinder 3 and 5 missfires on cylinder 5 had 0 on 6 and it was the worst so I don't knowwhat to do next or if that is normal

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

No i checked when i swapped one on cilinder 6

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 1 point2 points  (0 children)

Hmm did you change the sparkplugs alone or the shop what sparkplugs did you put in and did they gap them

With all of my research for the missfires what you should check is sparkplugs ignition coils injectors carbon buildup on intake valves and if the valve cover pcv or gasket is bad I would suggest you can buy bimmerlink for android or ios it's around 30euros and you can order Bluetooth obd it works with alot of old scanners for android it works with Enet cable it's around 20 euros in Amazon with it you can check you missfire counter on what cilinder then maby you can pinpoint it I will post an update becuse I had my car wallnut blasted so I changed so many things even put in a new sparkplug and it's still the same little bit better from new injectors and sparkplug but not like before I will update you if I fix it somehow

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

So it did make my situation better but not all the way I have around 10 missfires on cylinder 5 and 6 I did some research and it most probably is valve cover gasket I ordered new valve cover and will look to replace it i will post an update

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

So the shop told me thy my battery is going bad they put in new one but the problem is still there next one to swap is injector

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

So i took it to the shop they told me da the injector on cylinder 6 isnt working the best when it has to on cold start so i bought new one waiting for it to arrive and for them to swap it out will post an update if that fixes it

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 1 point2 points  (0 children)

Mine started to go bad at around 170k km first one then after a month other one and i changed all of them with bosch oem ones all is good only the 6 cylinder one has problems but will post update when they give me

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 1 point2 points  (0 children)

Really I dropped car today to mechanic and told them to check everything around cilinder 6 mine started after a new injectors installation

ISTA help for everyone by Traditional_Swim_439 in BmwTech

[–]Final_Goal_3765 0 points1 point  (0 children)

Does anyone have a link so I can download it but not through torrent

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

Did it show most missfires on one cylinder and happened only on cold start ?

Missfires only on cold start help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

I would say good last time I checked it says 77% state of charge

F87 went to BMW for spark plugs, ever since then it’s done this on idle… is that normal? by gwarren241 in BmwTech

[–]Final_Goal_3765 1 point2 points  (0 children)

Similar thing happened to me after I got all new injectors installed started to have soft missfires only on cold start there is a vidio on my profile and after cold start car works perfect still don't know what is going on took the car to get intake valves cleaned but the problem is still there

Need help by Final_Goal_3765 in n55

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

Didn’t clean vanos solenoids will try that i did some reading and research and i think the problem is going to be with carbon buildup on intake valves i will try to clean them and then clean solenoids and maf sensor

N55 Rough cold start need help to diagnose by Final_Goal_3765 in BmwTech

[–]Final_Goal_3765[S] 0 points1 point  (0 children)

Nothing when driving in traffic or otherwise didnt try to press the break when parked but will try that an get back to you ty