İs İt a Tİming İssue?

[cliosportap]

for a while i have a missfire problem on my car esspecially on low rpms
i found that the ht leads were gone and bought a set from uk.
i will recive them next week
but last 2 months there are different sympthoms like
when the car is very cold it dont start for the first attemp but the second or third there is no problem
also i recognize that there is a power loss a little
sometimes the car shakes when you give full throttle
i hear little explosions when i listen the exhaust
maybe they are from ht leads but can it be from timing
and how can i can check it
can anybody give an advice

 

[cliosportap]

no idea?

 

[Chrisjk]

At a guess, check ht leads, coil pack and spark plugs. The cold start issue is common, i sorted my problem by running higher octane fuel (99 instead of 95).