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Misfire
#4
(15-09-2018, 11:29 PM)Ben_w Wrote: Is it using any coolant? Have you done a compression test?

No it's not using any coolant, I don't think this is down to compression tbh. Think I'm going to replace sensors next. If it had low compression in one of the cylinders wouldn't it be misfiring the whole time rather than after getting up to temp?
Cheers

(16-09-2018, 08:32 AM)Mighty306 Wrote: Cheap scanners bought off the web won't read these. Lexia3 / PP2000 is the way to go but even then you might not get a code that points to something specific.  (Have had a similar problem n it just said fuel trim was out, which can be caused by a lot of stuff). Where in S Wales are you?

Vehicle is in open loop when cold so small air intake leak would get ignored until warmed up a bit. Could poss be lambda too. That's where I'd start. Emissions check at garage would help rule those out.

Beyond that a poor signal from other sensors (e.g. coolant temp, MAP, air intake temp) could cause poor running / misfire. Reference voltage to sensor as well as sensor itself need to be investigated. Have you got a multimeter?

This a a very useful site with a page specific to misfires.  Ignore the bit about misfire codes ...that's for later OBDII vehicles. https://www.aa1car.com/library/misfire.htm

Hi mate, I've seen some of them on eBay, reviews are very mixed. I'm from Carmarthenshire, just down from Swansea. You? Nope I don't have one. Need to pick one up, I have coolant temp, map and air intake sensor s on order.
Cheers
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Messages In This Thread
Misfire - by nile306gti6 - 15-09-2018, 06:06 PM
RE: Misfire - by Ben_w - 15-09-2018, 11:29 PM
RE: Misfire - by nile306gti6 - 16-09-2018, 09:08 AM
RE: Misfire - by Mighty306 - 16-09-2018, 08:32 AM
RE: Misfire - by Mighty306 - 16-09-2018, 05:56 PM

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