P0422 and other issues.
#1
P0422 and other issues.
Hi, I have been searching around and trying to figure out what I have going on. I am mechanically inclined but this one is stumping me.
I have a 98 V90 with 195K miles. I started to get P0300, P0302, P0304, P0305 codes. I replaced the plugs with factory Volvo plugs and no change. I found the coil packs all had cracks running down them so I replaced those with generic replacements and again no change. The P0422 has been mixed in there also and I know that can be caused by the random misfires.
I have a 98 V90 with 195K miles. I started to get P0300, P0302, P0304, P0305 codes. I replaced the plugs with factory Volvo plugs and no change. I found the coil packs all had cracks running down them so I replaced those with generic replacements and again no change. The P0422 has been mixed in there also and I know that can be caused by the random misfires.
#2
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#6
Just wanted to add some clarity on the fuel pressure spec for the car.
"The Volvo green manual states that the Regina system fuel pressure should be 43.5 +/- 1.5 psi static pressure. The rail pressure should be 43.5 minus the vacuum tester vacuum at the regulator vacuum port. This tells if the regulator is working. "
"The Volvo green manual states that the Regina system fuel pressure should be 43.5 +/- 1.5 psi static pressure. The rail pressure should be 43.5 minus the vacuum tester vacuum at the regulator vacuum port. This tells if the regulator is working. "
#7
Went and tested the fuel pressure. Was 43 with the vacuum to the FPR disconnected. With it hooked up at idle it is 36.5 so we are good there. I am still going to replace the filter because I do not now when (if) it was done.
The odd thing that I figured out is that it only acts up right after filling the tank. I only run the pump until it clicks off. If I go about 10-15miles and shut it off and let it cool it is fine until the next fill up. I am thinking that the evap purge valve might be sticking after doing some searches for other people having the same issue.
The odd thing that I figured out is that it only acts up right after filling the tank. I only run the pump until it clicks off. If I go about 10-15miles and shut it off and let it cool it is fine until the next fill up. I am thinking that the evap purge valve might be sticking after doing some searches for other people having the same issue.
#9
I would tend to concur. With that many cylinders misfiring, I would not expect an ignition issue but fuel supply. Keep in mind that the computer sees a misfire as the crank slowing down on the firing of that cylinder. It does not literally see no spark in the plug.
The other issue that you may have is a pretty substantial air leak that leans out the cylinder. I once chased a misfire on a 94 model 960 only to discover that the intake gasket was breached on one cylinder. After that, it ran fine.
The other issue that you may have is a pretty substantial air leak that leans out the cylinder. I once chased a misfire on a 94 model 960 only to discover that the intake gasket was breached on one cylinder. After that, it ran fine.
#10
#11
Sounds like the purge valve is stuck.
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#15
It is running a lot better and did not run bad after filling it up like it had been. I am thinking the hose was that issue. Something is still not quite right and the p0422 code popped up when the wife was driving it home from work today. Thinking there is probably another hose that leaking and causing issues. I also have a coolant leak that I need to hunt down from the back of the block. I think it is the pipe that the heater hose goes on at the head. Always something with this thing.
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