1998 V70 no acceleration under load, idles great

[milliniumvolcan]

update....... came home... did a fuel pressure test..... 40 psi ignition in acc...... no start. 43 psi after ignition and stayed at 43 even when reving the engine...... shut engine off..... had 41-42 psi..... 20 minutes later 35 psi..... i read that unless it drops below 29 psi in 20 minutes its good and thereby verifying fuel pressure regulator is good...... correct assessment or no?

second..... unplugged wheel speed sensor drove car no change.... HOWEVER... i looked down and the up arrow was blinking and the selector mode switch for S/E/W....... e was depressed but the W light was on..... when i depressed the S button ... both the S and the W light would blink..... odd..... havn't cleared the fault yet from pulling the speed sensor will do that tomorrow and see if the lights stabilize.......

third..... yes i did know that steam was coming from the oil dipstick tube.... clogged pcv system.... but decided to do the glove method...... glove in place and by the time it took me to reach my arm in... crank the car and look under the hood... glove was standing erect and full...... i'm thinking total blockage of pcv system?... could THAT be the reason for the bogging down?... would explain the leaking cam seals , crank seals that i replaced and the soon to be valve cover seal....

thoughts?

[milliniumvolcan]

update....... i pulled the battery terminal to clear codes......
blinking up arrow is still on..... the winter button will not disengage... i can push sport or economy and the winter condition ...STAYS... which may be an issue why i can't get up to alot of speed... perhaps... this is the cause of the loss of power...... i have read that a trans flush... MAAAAAAAAAAY fix the problem.... i exercised the shifter back and forth alot to see if that helped.... and nothing.. still blinking.... ..

i did notice.. when i first started car.. and drove ... in economy it didn't want to move.... put in the "S" mode... and it had no problem... good response... up to about 20-30 mph... after it warmed up.... power went away....

thoughts.... ?

[theWIFES_S70]

Did you car throw any codes? You should have a code if you have this blinking arrow. Sounds like you should probably clean your PNP switch. With these cars you almost have to have a little code reader on hand at all times.

This is what I have in our car at all times.
https://www.amazon.com/Autel-AL301-OBDI ... ode+reader

It certainly sounds like you need to plan for the PCV job. I don't think it'll fix the issue you have (as it has nothing to do with the drivetrain and/or transmission), but it certainly would rule that out. No one really flushes these transmissions, you drain and fill, drive, drain and fill. What color is your transmission fluid?

Good luck.

[milliniumvolcan]

I haven't flushed it yet... i'm sure its black and my laptop.... i'm looking at the fact the previous owner had NO CLUE what he was or what routine maintenance was..... the pcv system is DEFINITLY on the list.... but the no power issue is the biggest concern... the code was thrown yesterday so i'll need to get my buddy to pull it up on his tester.... he's got a fancy one from snap on.... it goes pretty in depth.. not sure if its like that valis? scanner for volvo specific... but its pretty good.... i'm sure its throwing a code now... I just don't want it to end up being something crazy like the transmission valve body or something... something that is crazy expensive like 1200-1800 dollars.... at that point i would just sell the engine and parts...lol.. I'm currently researching the pnp switch cleaning and removal and such.... it saaaaaaaaaaaays something about alignment... and the shifter portion that displays the pnd32low has been moved.... not sure if the previous owner tried to do something with the switches or not... he also had door panels off "installing speakers" yet master door switches were off.... i was first going to try and get the mechanical portion fixed then go inside the car and start to look at the electrical items like door locks and window switches.. but i'm wondering if there isn't somthing on the inside thats tied to the mechanical portion of the engine such as the s/e/w switch that is telling the engine not to shift hard into third because i have to let off the gas just to get it to shift.... it'll pick up speed slowly then not want to shift and when i let off the gas it will upshift..... all while the Winter switch is blinking.. so i'm looking at that as well.

when i do the transmission "flush" drain and fill, what type of inexpensive fluid should i use.. i was thinking a cheap walmart brand to flush it out ... then come back and put a good quality fluid.... because i have a feeling its going to take a couple of cycles.

[theWIFES_S70]

You can put Walmart ATF in there with no worries. Especially if you plan on doing drain and fills regularly.

But before that, make sure you pull codes. Codes on the cars give you a pretty good way forward... Good luck.

[milliniumvolcan]

Will do .... Problem was the first time the ONLY code it threw was the 410 code and after bypassing it there were NOOOOOOO codes .... And it still ran bad .... So whatever code I'm gonna get is because I drove it with speed sensor unplugged but maybe it revealed the other issue .... I'll pull codes once it quits raining .... I'll get back with ya

[milliniumvolcan]

alright.. update.... so my neighbor is a tool bag and he expects me to believe that his $2500 scan tool isn't with him at his house.. granted he is "disabled" when it suits.... so i didn't get chance to pull codes because his coveted scan tool that never leaves his side.... isn't with him...... soooooooooo...... all i could see is that there are NOOOOOOOOOOOOOOO reverse lights...... so pnp sounds like it maybe toast.... my question is..... is the pnp and the SEW switch connected and related?

[theWIFES_S70]

Hey miliniumvolcan, I would really suggest you pick up one of those $15 code readers off of Amazon. You only need something more robust if you're going to read live data.

That reverse light thing is a clue, but nothing definitive. If I were you and hankering to do things to the car to get it right, I'd definitely tackle the PNP switch cleaning. Here's quite possibly one of the most detailed write ups ever about locating, taking out, cleaning, and reinstalling the PNP switch.

viewtopic.php?f=1&t=29930

[milliniumvolcan]

yeah.. when i google on youtube..i see "robert".... he's pretty good and pretty thorough.... yeah i was thinking this weekend i was gonna dig in there and pull it and then clean and put some diaelectric grease on it.. and just see what we got.... i really feel like the noose is tightenin around the problem because we are eliminating alot of stuff..... and i will probably do the trans flush while i'm at it.... figure we'll rule out some simple stuff..... before we dip back into the car fund again.. lol... but does the pnp switch connect to the SEW? comes i'm wondering if there is some sort of bridge/relay that the pnp is clogged and not talking to the computer and telling the trans what it needs to do.... i see the switch on the diagrams.. but not really where it goes..... what volvo code reader is recomended.. ?

[milliniumvolcan]

ok... here's the update... so i took off the pnp... cleaned it.... thoooooooooooroughly.... put dielectric grease in it.... worked it over 20 times... and bam..... no more SEW blinky lights..... and no more up arrow... HOWEVER... the problem persists..... im going to get a code reader today... but as for now.. here is the link to see what its doing while driving.....


yes ... i put it up in a hurry...so i didn't pay attention to the name or title... but there it is.... thoughts?