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Slight misfire from cold after engine clean......



  Clio 182 Trophy. No. 189
......

Car was running ok for a day but since being left for 24 hours it now has a low down misfire when cold. Car still has usual power etc but wondering what likely outcome is?

No engine management lights have come on since issues.

Any help appreciated.

Thanks
 
  Clio 182 Trophy. No. 189
Also cleaned the VVT solenoid with carb cleaned, wondering if that wasn't such a good idea!?

Seems to be getting worse too.....
 
  ITB'd MK1
you cleaned the engine? why?

my bet is you have water in the sparkplug wells, seen this on a lot of "detailed" clios. STOP JETWASHING THE ENGINE!!!!!!
 
  Clio 182 Trophy. No. 189
you cleaned the engine? why?

my bet is you have water in the sparkplug wells, seen this on a lot of "detailed" clios. STOP JETWASHING THE ENGINE!!!!!!


Don't make me feel even worse!!

Have taken the spark plugs out and did not seem too bad, coilpack was a bit 'damp' and seems to run better again. May just get some new plugs anyway.

Cheers
 
  BG PH1 Megane 225
I made the mistake of cleaning my engine bay (didn't jetwash it however :eek:) and got a terrible misfire. I got water into the spark plug wells and I thought I'd ruined my spark plugs as they had gunk all over them so I bought brand new NGK plugs which didn't fix it. Then I thought I had injector trouble. Turned out to be moisture in the HT leads which over time dried out while I was trying to diagnose the issue and the car fixed itself! so try your best to dry the leads out along with the coil pack :)
 
  Clio 182 Trophy. No. 189
I made the mistake of cleaning my engine bay (didn't jetwash it however :eek:) and got a terrible misfire. I got water into the spark plug wells and I thought I'd ruined my spark plugs as they had gunk all over them so I bought brand new NGK plugs which didn't fix it. Then I thought I had injector trouble. Turned out to be moisture in the HT leads which over time dried out while I was trying to diagnose the issue and the car fixed itself! so try your best to dry the leads out along with the coil pack :)

I think this was the problem on mine - took the coilpack out, turned it upside down and drip...........!!
 


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