misfire all cylinders
#1
misfire all cylinders
My 96 850 turbo with 95k has a misfire. It does not happen all the time, and I can't pin point like conditions when it happens. However, I do a lot of freeway driving and it tends to happen in the evening on the way home freeway speed car has not been drove in 9 hours.
I have put in new plugs (volvo), wires (bogicord), cap and rotor (bosch). I have noticed a vacuum line with a crack in it. It is the vac line that goes from the air intake into the turbo. It does not seem to me like that would cause the misfire.
What I am wondering is what should I check next to try and determine the problem.
I have put in new plugs (volvo), wires (bogicord), cap and rotor (bosch). I have noticed a vacuum line with a crack in it. It is the vac line that goes from the air intake into the turbo. It does not seem to me like that would cause the misfire.
What I am wondering is what should I check next to try and determine the problem.
#6
#8
Plugs are to spec. Checked each one before I put them in.
To the what's happening when its happening question... I think all of the above. But it is most pronounced going steady at freeway speed. I have definitely noticed it at acceleration, and steady, and I think idle too. (I will try to pay more attention to this).
The MAF I have never cleaned because the fasteners they put on (t-20 I think it is). The peg is larger than the hole on the bit. And I have tried numerous bits. I got to figure out a way to get rid of that post.
And as far as I know the o2s have never been changed. My MPG is about 19 so on the low side especially considering I do a lot of freeway.
To the what's happening when its happening question... I think all of the above. But it is most pronounced going steady at freeway speed. I have definitely noticed it at acceleration, and steady, and I think idle too. (I will try to pay more attention to this).
The MAF I have never cleaned because the fasteners they put on (t-20 I think it is). The peg is larger than the hole on the bit. And I have tried numerous bits. I got to figure out a way to get rid of that post.
And as far as I know the o2s have never been changed. My MPG is about 19 so on the low side especially considering I do a lot of freeway.
#10
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1996Volvo850
Volvo 850
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04-20-2009 02:50 PM