Hello Volvoians, Still no answer solution about the " Not all onboard diagnostic functions are available " ....or something like that ! So far I have erased the engine code about evap. PO455 i think ! Did the funky " reset computer " drive, yuh, 3x. Disconnect batt. and tied the ...

Hello Volvoians, Any other suggestions for bring the OBDII system back online for an inspection sticker ! ? I did the " special drive " thingy and that did not work. What about disconnecting the plugs to the ECU ? I mean there's gotta be something else, somebody, has done something else, i...

Boosted, thank you ! WOW ! That is amazing ! Did not think to look at the fuel additive ( unleaded or not ) .
Stock ECU's ! ? Are you suggesting, my 96 850 T can have mods or different ECU ! ? Or maybe install a different
chip set ?

You are very lucky to have found such a nice, understanding person !

Hello Ozzy,
Yeah,too funny ! The 100 octane stuff ! I work on aircraft ( Cessna 412 Ultraliners ) in the early 80's and used their fuel
in my car all the time...WOW ! Now, i just add the octane booster that is available at parts store ! It definitely makes a
difference !

Hello Volvoians, Interesting comments here. Thanks. We have some thinkers and tinkers here. When i took the top-end off on my 96 850 turbo with over 155,000 on it, I was amazed at the condition of the pistons and valves. They looked like they could go another 200k. NO exaggeration here folks. I meas...

Mr. Alot, Thanks alot ! Hey, that li'l mod to the intake is, Bonus Boost Time !Nice ! Yeah, that's my next one ! Oh, i hated putting mine back together without that cold air intake mod ! Yeah, I' ll try these 2 suggestions. Heck, I hope it is one of these simple obstructions ! Wiggle it and / or dus...

Hello Volvoians, My personal experience is ( for turbo ) run the highest octane you can find. Not afford,but FIND ! Why ! ? because if um not mistaken, it was on this site that for turbo Volvos if you don't run 93 octane it will lead to head gasket failure ! Which i believe happened to me. All fixed...

Hello Volvoians ! trying to help out a woman friend who's 98 V 70 with 100k plus miles, on-board readiness stuff are not communicating. I did not use the exact driving procedure as discribed in this forum but i did put it through 3 events. Like cold starts, drive it approx. 5 miles ( + - few miles )...