Hi everyone,
As above really sometimes on start up(only when car is cold) I have a wat sounds like a slight misfire(no flashing cel) or anything it just appears to struggle to rev this last no more than 30 seconds then all is good never happens any other times and only every now and again
Mazda rev c coils 9k ago
Magnecor leads
Sparks 8k
Any ideas much appreciated
Dazzq
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Occasionally misfire only on start up
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Re: Occasionally misfire only on start up
I get the same issue. I'm guessing it's from where the ECU is injecting more fuel to compensate for the cold start and the engine struggles to burn some of it off. Or tired injectors?
I also get a massive misfire symptom when i accidentally turn the engine off cold and start it again. completely drops on one side of the rotors for about 5 seconds. nearly dies but catches itself and smooths out. I'm pretty sure i flooded it!
I also get a massive misfire symptom when i accidentally turn the engine off cold and start it again. completely drops on one side of the rotors for about 5 seconds. nearly dies but catches itself and smooths out. I'm pretty sure i flooded it!
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Re: Occasionally misfire only on start up
Hmmm,it's odd as I mentioned it doesn't allways do it even from.cold just occasional on 10 cold starts it may do it 2 or 3 times.
Car runs perfect otherwise
I have done the reset just in case but that changed nothing
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Car runs perfect otherwise
I have done the reset just in case but that changed nothing
Sent from my SM-G930F using Tapatalk
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Re: Occasionally misfire only on start up
How would.i inspect that John or how could I tell of that's the problem.
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Re: Occasionally misfire only on start up
Pete told me mine was that and it was let it tick over for about 20 minutes without touching the throttle, maybe something else but that needs an expert opinion maybe.
- These users thanked the author acegeezer for the post:
- Dazza44 (Thu Aug 01, 2019 3:42 pm)
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Re: Occasionally misfire only on start up
What's the story with the CAT?
R3 GONE, FUN WHILE I HAD HER BUT NOW LOVING MY 25TH ANNIVERSARY MX5
Mods so far..
BBR 200 PACKAGE
COBRA " RACE " BACK BOX
MEISTER COILOVERS
KONIG HYPERGRAMS ( POLISHED LIP)
RACING BEAT ARB's ( FRONT AND REAR )
IL MOTORSPORTS STRUT BRACE AND ADJUSTABLE
DROPLINKS
Mods planned..
BBR STAGE 2 SUPERCHARGED
WILWOOD 6 POT BBK
FULL UNDRBODY SEAL
ATOTO HEAD UNIT
Mods so far..
BBR 200 PACKAGE
COBRA " RACE " BACK BOX
MEISTER COILOVERS
KONIG HYPERGRAMS ( POLISHED LIP)
RACING BEAT ARB's ( FRONT AND REAR )
IL MOTORSPORTS STRUT BRACE AND ADJUSTABLE
DROPLINKS
Mods planned..
BBR STAGE 2 SUPERCHARGED
WILWOOD 6 POT BBK
FULL UNDRBODY SEAL
ATOTO HEAD UNIT
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Re: Occasionally misfire only on start up
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- Ainmhidh (Thu Aug 01, 2019 9:12 pm)
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Re: Occasionally misfire only on start up
Mine does this as well, although not so much if its cold but if it hasn't been started for a week or so. Again, no engine light and clears up after about 30 seconds. Got RRP mk2 coils, and a high flow cat. I wondered if it could be some kind leaking seal letting water into the rotors, although the coolant doesn't seem to be going down.
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Re: Occasionally misfire only on start up
Any other thoughts/ideas for me to check ?
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Re: Occasionally misfire only on start up
How long since you did a full battery disconnect and 20 stump reset, from cold?
Sometimes the "learning" process can be corrupted by unusual conditions and reset does the trick.
https://www.rx8ownersclub.co.uk/forum/v ... 25&t=34703
Sometimes the "learning" process can be corrupted by unusual conditions and reset does the trick.
https://www.rx8ownersclub.co.uk/forum/v ... 25&t=34703
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Re: Occasionally misfire only on start up
That guy was in the audience of a comedy club in London a year or so ago and was certainly looking a little worse for wear and um, not as well-spoken though, the lady he was with seemed a little more of a handful.
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