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It was a snow day for me and I really liked this new drop:

Overview Over the last few years, simple handheld battery-powered oscilloscopes have become available for less than $40. This thread is about the FNIRSI DSO152 oscilloscope, and how it can be used for automotive diagnostics. The examples here are from a Volvo Redblock Engine with a Bosch LH2.4...

https://www.diyautotune.com/news/thank-you-the-best-is-yet-to-come/

I recently updated some of the lost pictures and info in The Official DSM CAS Guide. While I was at it, I hooked up a MicroSquirt on the benchtop and took some waveform pictures for common MegaSquirt and MicroSquirt Ignition and Injector setups. The benchtop MicroSquirt was setup for: - 2.3L...

Let's say that I want to hold on to my '85 wagon for at least the next 10 years. A couple years ago, there were a good number of 240s that came through the closest salvage yard, but it's really starting to dry up in the last year. Roughly 28 240s/year 2 years ago, 33 240s/year a year ago...

I can't seem to find my pictures from when I pulled the engine harness from a '93 240. Does anyone have some pictures that show the routing, and clamps, for the harness? Alternately, can you describe how the harness drops from the firewall down to the engine -- where does the harness go in...

The under car fuel pump mounts on a plate using 3 rubber isolators. Is there some trick to installing those isolators? If it matters, turbo K-Jet with aftermarket (MT?) parts from IPD (Volvo # 1346175, supersedes original # 1255018). I tried my best last night and just couldn't get the ~1/2"...

Should there be a hose on this barbed plastic AW-71 vent nipple? If so, where should it go? Thanks, Bob

TLDR: Are there any engine guys out there that are up on Super Knock / LSPI who can comment if it's relevant to our high boost Redblocks? After viewing the bent rod carnage in a recent post, I was reminded of a warning from my younger years to "never lug an engine". This made sense since I...

Out of curiosity, does anyone know what the little white dots are on the early cable-driven speedometers? On the 85MPH speedo, I'd guess they're some sort of shift point or max speed for 1st, 2nd, 3rd gear, but this doesn't make sense on the 120MPH speedo. On somewhat related stuff, the...

Months ago, I saw a 940 in the salvage yard with front end damage and a blown-out mini/high-pressure spare on the front left. The front end damage looked like it came from a guard rail/concrete barrier but the damage didn't quite make it all the way to the wheel well. I'm guessing the tire...

Are there any good knock detection options for MegaSquirt-II/MicroSquirt? I'd like the safety of knock detection in case anything fails after initial tuning, or if someone borrows the wagon and graciously [?] refills it with u-pump-and-pings finest economy grade. I tried using a KnockSense on...

Well, not everything but certainly my understanding of the basics wasn't right.... This thread is a continuation of side comments in: http://forums.turbobricks.com/showthread.php?t=330454 (thanks gross polluter) Let's start off with a simple quiz to see what the audience knows. For...

A few weeks ago, I met a nice gent who was cleaning out his garage and giving away his old 245 parts. Amongst the treasures, was this really sweet custom cupholder that was made by a friend of his. Besides its simplicity and good looks, the clever part is how it uses the parking brake button...

How do I mount a LH2.4 crankshaft position sensor on a B21FT block? I've searched and found some references but the pictures are long gone. The B230 blocks have machined bump-outs on the bellhousing flange that fit the hollow pin locating sleeves on the CPS bracket with room for a cap screw in...

What's the proper procedure for measuring piston protrusion for a tight squish motor, both for determining desired deck machining and for post-machining head gasket selection? More specifically, what if there's some piston-to-piston height variation and the pistons all rock a bit? Do I measure...

Has anyone successfully setup MS2 Closed Loop Idle, and Idle Timing Advance, for an Automatic Transmission? If so, can you share a screenshot or .msq of your CL Idle parameters? I'm having stalling problems when shifting from Park (low load) to Reverse (high load), or the equivalent Neutral to...

I'm building a B21FT to swap into my 1985 245GLT AW71 using parts from a 1983 B21FT short block and a 1989 B230F long block. What parts from the B230F are compatible with the B21FT? I've compared the two factory parts catalogs from...

Since I'm posting pictures tonight, here's the central locking switch harness out of my '85 245 driver's door. The circular collar goes around the lock cylinder, and the black cylindrical one is part of the lock pull -- pull up extra and all doors (plus trunk/tailgate) unlock, push down extra...

I needed to bleed the brakes on my '245 after swapping in a non-whining rear axle assembly so I put together a simple pressure bleeder: Worked great, not a drop of brake fluid spilled in the engine compartment! (But to be fair, the brakes still seem a bit soft -- I'll re-bleed after 100mile...