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T5 Misfire under load

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Volvo 850 :: Technical and Advice :: Tuning

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Post  Rob Thu Mar 28, 2013 2:07 am

I'm lost
Luckily it's not mine
I've got a t5 with a misfire under load
Starts at about 3000rpm and won't rev much above 4000
It'll rev freely with no load
It seems like fuel starvation
So far I have changed
Cap
Rotor
Leads
Plugs
Maf
Ecu
Fuel rail
Fuel filter
Fuel pump
Cam sensor
And checked for boost vac leaks

If anyone has any idea please let me know



Rob
Rob
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Post  p fandango Thu Mar 28, 2013 6:54 am

is it not throwing any fault codes?

what about the coil, if its only creating a weak spark the boost might be blowing it out

p fandango

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Post  Rob Thu Mar 28, 2013 7:10 am

Already changed that
I missed it off the list
The only thing I can think of now is maybe the crank sensor
I can't believe I'm stuck on this one
They rarely beat me Smile
Rob
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Post  p fandango Thu Mar 28, 2013 5:05 pm

no the engine wouldn't run if the crank sensor was knackered would it

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Post  Rob Thu Mar 28, 2013 6:01 pm

The only thing I can think of is something I've already changed is bad
I'm going to have to start again
Ill probably swap bits with mine
Rob
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Post  cb70 Fri Mar 29, 2013 6:46 am

maf sensor had same on the green one ?

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Post  Rob Fri Mar 29, 2013 7:36 am

It turns out 2 sets of knackered ngk's
I should have known better Sad
Rob
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Post  CONRODS!! Sat Apr 06, 2013 5:08 am

oh yes indeed dude but it does go well now Smile well the other week it did lol
CONRODS!!
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Volvo 850 :: Technical and Advice :: Tuning

 
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