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Good post. I have an electronic steth that wasn't very expensive. Especially good for finding bad alternator and idler bearings long before they show up otherwise. And if I remove the tip I can listen to what the neighbors are saying from hundreds of yards away ;)

Yep, he still could have a BHG. I haven't seen it mentioned but when installing the thermostat be sure to put the little bleed valve at the 12 o'clock position.

Just go to a hardeware store and get M6 X 30 bolts. I'd also use external star locks on them and go easy on the torque.

As you're already found out a code 51 means the IDL contacts on the TPS are open. Since the ISC system will not operate unless they're closed there's your problem. The poteniometer portion of the TPS is electrically separate and has nothing to do with idle (the ecu ignores it when the IDL...

Well said Grim. If the coolant system is healthy then coolant should run slightly above the T Stat rating and never below. To address your problem in another thread, the only reason coolant flows into the overflow bottle is because system pressure exceeded radiator cap pressure. That can only...

Yeah, the Inovate unit will do the job. It's just a judgement call and as a control systems type I dislike such arrangements. Btw jimi, I've been meaning to compliment you on your car. Beautiful work.

Like I said, there's never a set of Noid Lights around when you need them ;). . Did you check the power side as mentioned in the previous post? Also, Grim's question has merit...answer it.

To error is human, to forgive is divine ;). Not that it won't work (assuming it had the right output), it's just smart to keep your lambda system separate. The narrowband is a simple gadget while the wideband is not. It's simply an issue of reliability and redundancy. Btw, a narrowband outputs...

As noted, platinum and iridium offer no performance advantage except longer life. I'll spare you the lesson on plasma physics but if you use anything else the plugs will wear faster. Not a problem as long as you deal with it. This is due to the Supra using a DIS/waste spark system. Not only does...

I don't know anything about your UEGO but this statement: "I know it can show 0-5v like the stocker with the analog output it has" is confusing. A narrow band O2 sensor, including the stock on on your car, does not output 0-5 volts. As for using the wideband for lambda control (even if it does...

I'm curious. Are these rod knock issues only on rebuilt or JDM motors? I'm unaware of a single instance of it on a motor built by Toyota, including mine and I've never run more that 4.2 quarts in it since it was new. I've always driven like I stole it too. All of this doesn't mean anything of...

One of the single greatest problems on this board. Lol, makes ya kinda crazy don't it? ;)

Although work hardening does reduce ductility it can only occur in the plastic region ie; there must be strain. No strain, no pain ;)

Yeah, other than the point about "aluminum" (which could mean any number of alloys with different properties) having a finite fatigue life even if kept within the elastic region while most steels do not, the rest of that is inaccurate. Not to mention torsional loading is complex and differs...

I can think of a half dozen ways to do this. Some Volvos also come equipped with an oil level sender. That said, the idea is not new and there are several "electronic dipsticks" already on the market.that can replace a stock one

There are no parts in the climate controller that can squeak. What you're hearing is likely the servos that drive the blend doors, ect. The Supra's climate control is a fairly complex closed loop system and any time you have the dash out to replace a heater core or A/C evap it's best to go over...

The THA air temp thermistor is simple and seldom goes out so it's no surprise yours is OK. The Karman side of the thing is where all the real electronics are so yes, if yours is off by 100K something is definitely wrong. Be sure you're measuring right or check it on the car (if you can) as AFMs...

sigh...

Yeah, the TSRMs are different after 89. They don't provide some information but the pre 89 skips some things too. For example the 87 has very little about engine lubrication. Since the AFM on N/A cars is a potentiometer vane unit the following applies only to the Karman Vortex AFM used on turbo...

Which terminals? The AFM can be tested either while the car is running using a voltmeter with a frequency function (or a scope) or with it unplugged using an ohm meter. Both the air temp signal (THA) and air flow signal (Ks) must be checked. If you're talking about THA, 1.2K is a bit low but...