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OK well after some more digging I found out that I have a b2200 motor but I have a b2000 computer, hmm. Apparently this isnt much of an issue and it should run fine either way. I already popped the ECU open and looked for any physical signs of damage, there were none. I don't know how to find...

Keep looking, Ive seen them pop up in the for sale section for under $40 on several occasions.

Alright, so the signals are identical when measured directly at the computer. O2 sensor reads .8 or so volts at the pin at the ecu, and the signal out of the ecu is just the same, commanding rich. I tested the water temp sensor and it is OK (.4k ohms at op temp, measured at the ecu). The only...

Alright gotcha. Unfortunately there are no diagnostics on this thing as far as I can tell. There is an "EGR" light on the dashboard that simply illuminates every 60k miles to get you into the dealer for a checkup. To reset the light you swap a connector under the dash lol. So it seems the case...

I am a bit confused here, maybe I am not understanding how the circuit is set up. I was under the impression that the solenoid is fed a constant B+ with the key on, and the ECM provides a ground to the solenoid to energize it. The check connector, I thought, is on the ground side of the solenoid...

Yeah, included a screenshot of that, and another sample. I made sure the attenuation was correct and that the coupling was correct. Signal looks the same as last time. Like before, no matter what I do with the throttle or anything, the signal remains the same, and as long as they key is on it...

I have heard that these generally don't work too well. I think felpro makes a head shim for the 7m, but not positive.

I made sure it was on DC coupling, in fact I double checked and there was no change between AC and DC coupling settings at all.

Pull the turbo, its going to be so much easier if you do. Then you can inspect the surfaces and make sure all the old gasket is cleaned off and there are no scratches on the turbo itself. Use an OEM gasket, and I put a VERY light amount of right stuff sealer on both sides (as light a smear I can...

If I am understanding this correctly, as the computer commands a leaner and leaner mixture (less fuel, closing off the solenoid longer), duty cycle increases? The manual above states anything greater than 70% duty cycle indicates a lean command, so the computer is commanding a leaner mix. In...

The for sale forum. I have a junk head, if you need these things, PM me, I can get you a full set.

Alright I need some help 3p lol. I can safely say I don't really know what I am doing here. The engine is running rich, after warming it up and getting it on the road, the o2 is reading around .9v. I hooked up my scope to the solenoid, but don't understand the readings. I am not sure if the...

Damn that Dexcool looks yummy :yumyum:

Any excess flow that cannot be pushed through the motor will simply go back to the pan via the pressure relief valve.

Only issue I have with the flex sheathing is that if for any reason you need to open the harness you would have to slice it open. Not to mention running a new wire in there would be a total pita and its impossible to replace the sheathing without depinning all the connectors.

The "80" reading I took was at idle, the test results are given with no reference to when they were taken, could have been idle, under load etc, the sheet doesn't indicate. Another thing is my meter was on Dwell measuring in degrees, this part confuses me. You would think the duty cycle should...

Brad, I attempted to check the timing last night and it appeared to be way advanced, but the lower plastic timing cover is very flimsy and I need to make sure actual TDC matches the printed TDC mark. You are probably right, I would just expect nox to be much higher if my timing was this far...

Well I recently bought myself a daily driver, it is a 1987 Mazda B2000 with a 2.2L B2200 engine in it. Its a nice little truck and was what I could afford. It is a bit rough but it will get me around while I work on my real car (Supra). Anywho, the truck failed emissions. Here are the readings...

It will keep electrical noise/rfi out of your stereo and other electronics in the car, best to keep it on there. Your radio will still work, but will be more prone to background buzzing without it.