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Updated Scanmaster and PowerLogger were working fine for years. Attached fuel pressure sensor to PL data block. Now PL receives and displays data as before, including new FP reading, but the Scanmaster display has basically gone dark. At key-on, Scanmaster displays "SCN 2.2" for a second...

Engine has begun missing and stuttering just off idle. Idles fine and runs strong and smooth with more throttle. This developed and got worse over about a month. In the beginning it only happened during the first several minutes of driving. Now it's constant. Engine parameters bounce...

'87 GN, lots of mods but none recently except for a switch to vacuum brakes. Problem appeared out of nowhere a week ago: at TPS of about .70 to .85 the engine cuts in and out. Lower than .70 and higher than .85 it runs fine. RPMs are in the 1800-2000 range when it happens. Powerlogger...

Rebuilt my engine last fall and I'm recently getting a 32 malfunction code: error in the EGR system. Does anyone have a trick for removing the EGR valve without first removing the valve cover? There's a 1/2" (13mm?) bolt securing the hold-down clamp that hides under the vacuum unit. It's...

'87 GN 3.8L I've wiped the #3 exhaust cam lobe three times. I read somewhere that GM put out a number of 3.8L turbo Buick blocks with a misaligned tappet bore(s). I read that Buick solved the problem by using specially built cams that had lobes positioned to deal with the offset(s) from spec...

Need oil cooler adaptor for '87 3.8 Buick Turbo V6.