This sounds like a bad MAF issue to me. If this is a non-turbo, check the accordion air hose to the throttle body for cracks underneath - sometimes they'll bust a hole right in the middle of them. If it's a turbo, check ALL air hoses for a good, snug connection at the clamps. If none of that works,...

Hello all, my car has been having an issue for a couple months and I would really appreciate some help getting to the bottom of this. It's a very specific issue and it only happens under specific circumstances so I will try and narrow it down for you guys. When taking off from a stop/red light somet...

Yes the fuse was good (not sure how to check socket) but your information was very specific and very helpful jblackburn. All the pins and wires still were showing positive for continuity so I went to a friend who was parting out a Volvo very similar to mine and grabbed his ECU. I popped it in my car...

Yes I can use google too, its the first thing that pops up when you type in "p0412". I am just wondering what PIN from the wiring harness of the ECU to which wire end needs to be check for continuity. If thats all good, then how do I check that the ECU is ok? My dilemma is that the relay w...

Just want to give a shout out to all the people who rove these forums offering their wisdom and knowledge on Volvo's. So my air pump was filled with water and rusted. I removed it and put in a new air pump from a used car (check the air pump and it in fact turns on and runs) the light went away (YAY...

I tried the glove test for the PCV (taking the oil cap off and putting a glove over the hole to see if it fills with air) and it still fills with air though so I fear its not 100% better. You mean oil dipstick, not cap, right? I did not use the heater hose as was advised because my car is non-turbo...

So I am back! I changed the PCV system and did a tranny drain and fill (so 3.5quart exchange) the car shifts a little better and has some more power now, there is no more oil shooting out of the oil cap ( I can tell by now seeing fresh oil ontop of the spark plug cover) there is also barely any whit...

It is easy to test if the PCV is clogged. Age and mileage play a great factor in a system like that. 18 year old hoses and tubes are just old old old. Are you running 91+ octane? The NA cars have pretty high compression motors and if you are running low octane fuel, the car can retard timing to avo...

I definitely will do a whole system change then and definitely planning to change the tranny fluid as well. Thanks a lot for the info guys! I will let you know how it goes.

mecheng makes a good point it could need tune-up parts ... For PCV it is imperative you don't buy cheapo hoses, they will rot out in no time. However you can spend much less by following this DIY guide, you really only need to get three hoses from Volvo: https://www.matthewsvolvosite.com/forums/vie...