Cold start worse than usual after plug change.

[Ste666]

I've just had the spark plugs done on my 182 by a garage i use all the time for my services, mot's etc, picked the car up last night and it drove back great, went out this morning and all was fine but when i started it this afternoon, it seemed to want to try cut out when i pressed the accelerator, i set off anyway and it jumped a little and popped from the exhaust.......a more exaggerated version of how 182's normally cold start, after about thirty seconds it was fine, took it for a good drive and was fine all the way, i even pushed it hard with no problems at all so it's just the cold start up thats the issue.

Any idea's on what this might be?......maybe a sensor that's failed after being knocked.

Any help would be appreciated thanks guys, i don't want to take it back unless i really have too.

 

[st3ve]

NGK's...?

 

[Ste666]

NGK's...?

I don't know mate, i do know they always use genuine parts though as i had to wait to pick the car up because they were waiting on a renault gasket for the intake, this doesn't really help with the plug make but i know they are a bosche approved service centre so maybe they used bosche plugs.
Strange thing is that it didn't do it when i picked the car up or this morning when i started it from cold.......just this afternoon onwards!

I have heard the rule of using NGK's but if it only does the poor start from cold but then runs good when warm could it be the plugs themselves?