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Author Diagnosing a misfire
dean101287
Member

Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
10th Jun 10 at 18:11   View User's Profile U2U Member Reply With Quote

The car has a bit of a misfire, its juddery at low revs and if i boot it its quite flat untill 4500rpm when you can feel it kick in and the power will come. Also if im in a highish gear at lowish speeds and stamp on the accelerator then the car will misfire badly and you can hear it lose power and try to kick back in. Also on overrun you can hear it pop which i think is a sign of overfueling?

How would a garage go about finding out what is the cause of the problem? Instead of me just guesing.
Ellis
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Registered: 11th Sep 07
Location: Aberdeenshire
User status: Offline
10th Jun 10 at 20:45   View User's Profile U2U Member Reply With Quote

I would point at the MAF, you can check the voltages but I can't remember what they are for the life of me.

Someone wit Autodata might be able to help.
rbailey88
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Registered: 27th Jul 09
Location: cheshire
User status: Offline
29th Jun 10 at 19:10   View User's Profile U2U Member Reply With Quote

id like to no the same mate, my xe is doing that, low revs just splutters and doesnt go anywere... plus gettin to the end of my road costs about a tenner so its got to be overfuelling... so far ive changed temp sensor cleaned injectors and having crank sensor done 2moro, not sure what to replace next??
dan-sport
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Registered: 9th Oct 07
Location: Bushbury, West Midlands
User status: Offline
30th Jun 10 at 09:34   View User's Profile U2U Member Reply With Quote

on your xe change the afm my was over fueling an missing something fierce changed that and was like a new engine
dean101287
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Registered: 22nd Jul 07
Location: Cardiff
User status: Offline
30th Jun 10 at 10:28   View User's Profile U2U Member Reply With Quote

Mines pretty good on fuel. Infact it did 380 miles to 50 quid last week.
rbailey88
Member

Registered: 27th Jul 09
Location: cheshire
User status: Offline
1st Jul 10 at 21:05   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by dan-sport
on your xe change the afm my was over fueling an missing something fierce changed that and was like a new engine


cheers mate, ill go for the afm next, had engine fully rebuilt before it went in so should drive spot on when it stops missing. thanks for info.

 
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