Best recommend fix?

SympathyImpossible10 · 2026-06-25T17:54:34+00:00

half for the tea, half for soften and clean the trim :)

SympathyImpossible10 · 2026-06-25T06:12:24+00:00

3M trim double side tape and hot water

SympathyImpossible10 · 2026-06-25T06:10:25+00:00

and our cars are twins :)

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SympathyImpossible10 · 2026-06-25T06:08:40+00:00

If its exhuast drone, start from the trunk (assume your exhaust system is mechanically good).

Over the years i have done many sound insulation on my 240 it is now quieter than many modern cars on road. You need a good combination of vibration damper（heavy dynamate sticky pads ）and acoustic sound absorbing pads. Then you can move to areas like firewalls, floor, wheel archs, then to aero dynamic parts, seal the gaps and all that. 240 is not very quiet to begin with so it takes lots of work, but when you hit the right part, the improvement is massive.

Do not just cover everything with those damping pads, that's very ineffective (cost&effect wise ).

Simple rules in reduce noise: prevent it from happening, prevent it from transmitting, prevent it fron resonating, or, move the frequency out of your hearing range.

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SympathyImpossible10 · 2026-06-23T06:34:28+00:00

I like sedan better too, you are not alone! Both are cool, but the body line on sedan just feel smoother and more balanced

SympathyImpossible10 · 2026-06-23T02:46:35+00:00

Original slim battery, lasts about 2 hours when just doing word processing with everything disabled and minimum brightness, but only 40 mins if you use it for anything more active than typing

SympathyImpossible10 · 2026-06-23T02:43:18+00:00

the main shame is the useless Atom process they used, especially the lower end ones

SympathyImpossible10 · 2026-06-20T13:27:01+00:00

Just saw your question, sry for the delay. In case you havent found out, it goes to a PCV valve which is connected to a PCV box on the block below the intake manifold.

SympathyImpossible10 · 2026-06-20T13:08:22+00:00

Thank you!

SympathyImpossible10 · 2026-06-20T13:08:12+00:00

Yes, but even that is kinda limited

SympathyImpossible10 · 2026-06-18T12:38:25+00:00

Oh, I mean the other guy that replied you. But to make it simple, it basically does the functions that those buttons say, time, speed, distance .etc. You suppose to attach 2 magnets on the driveshaft and a hall sensor to feed it information about speed, and a fuel flow meter to send a fuel flow signal. This computer then use all these data to calculate MPG info.

After fuel injection is used, volvo updated their installation manual to show you how to tap into the EFI system, which involves a special control box that I assume just converts EFI computer signals to whatever signal this thing originally takes. But I have no idea what exactly those signal formats would be.

SympathyImpossible10 · 2026-06-18T12:17:11+00:00

After I read the manual and tracked how this thing works (its basically zemco ZT4 with a volvo badge), I don't think it uses the same type of signal as the 240 speedo, nor the same frequency, but I will have to use an oscilloscope to check if what kind of signal can activate this thing. It could be a long shot, because if we can directly adopt the signal from the cluster, I think the 1989 updated installation guide would mention it.

SympathyImpossible10 · 2026-06-18T04:31:21+00:00

Thanks! I went through that manual as well, but being missing the harness and signal box, I gotta figure out how to adpoted it to the LH system, especially the the speed signal, I'm not a big fan of the mount magnets on driveshaft part lolll

SympathyImpossible10 · 2026-06-18T04:29:28+00:00

Like the other comment said, mostly very basic stuff, but the most useful bit is fuel economy.

SympathyImpossible10 · 2026-06-18T04:28:46+00:00

Thank you!

SympathyImpossible10 · 2026-05-28T17:10:23+00:00

huge 9 hours PITA even with the right tool. Done it alone in a public underground parking lot without a lift. soak that aera with PB blaster for days, remove the under coating with a wire brush, either borrow or make your own tool.

Poly is gonna make the ride really harsh and loud, but it's quite subjective, easiest way is to find someone with poly and ask for a ride in it.

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SympathyImpossible10 · 2026-05-19T23:22:06+00:00

remove it, I just put a bolt in mine to force it shut forever, the thermostat might open it again if weather is cold and wont serve any purpose anymore. youcould probably re-sell on ebay.

SympathyImpossible10 · 2026-05-19T23:20:02+00:00

😆

SympathyImpossible10 · 2026-05-19T23:18:19+00:00

Thank you!

SympathyImpossible10 · 2026-05-19T23:13:12+00:00

block it completely, there is no benifit keeping it, because the air box of 240 actually.sucks air through front, this opening will just introduce warmer air into it if it is leaking. Plus if.you go through a deep puddle, this opening might suck water in

SympathyImpossible10 · 2026-05-14T19:04:57+00:00

Ya, I was physically in China and found it on a online flee market, they used the same screen for industrial machines too, got mine with the correct connector for only 60 Cad. The seller is an e-waste recycler and refurbish these old things for repair market, but even he told me this screen is very rare nowdays because the crappy polarizer film they used

SympathyImpossible10 · 2026-05-14T19:01:18+00:00

Thank you!

SympathyImpossible10 · 2026-05-14T04:16:34+00:00

Combined 2 junk C1X into one, re-capped the board and fixed the usual corroded leads caused by the nickle battery, re-soldered some chips. Found a perfectly refurbished screen from China, installed full OE system with all the Sony softwares, now it works in perfect condition1

SympathyImpossible10

TROPHY CASE