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    • steve
      steve replied to the thread 1G 1990 Idle jumps around.
      Stick around young Padawan, you'll get plenty of chances to see the broader range of behavior specific to the beast. If you're in a hurry there are many examples available using the force (search). :)
    • steve
      steve replied to the thread 2G Inconsistent AFR.
      Gentlemen,What do you consider adjusting MAFComp to be?
    • steve
      steve replied to the thread 1G 90 No voltage to TPS.
      The TPS is a classic adjustable resistor (potentiometer) used as a voltage divider. One end of it is connected to ground and the other end to a voltage source, in this case roughly 5v from the green/red wire on ECU pin 23 (+5v Sensor Power). The...
      • 90ECUTPS.png
    • steve
      steve replied to the thread 90 TPS vs 91 TPS.
      Closing the loop here for future searchers. The Extra Green wire on the 90 harness is for the Idle Position Switch on the back of the Throttle Body.
    • steve
      steve replied to the thread 1G 90 No voltage to TPS.
      The TPS checks look to see if the TPS output voltage is below 4% or over 40% and the IPS isn't opened yet. At idle the the TPS voltage should be around 0.5V and the IPS closed (pulling the signal from the ECU to ground) so the fault conditions...
    • steve
      steve replied to the thread 1G 90 No voltage to TPS.
      I don't have my 1990 Factory Service Manuals handy so the best I can offer is from the 91 versions which is different in the type of parts but the same in process. If I recall correctly a 14 fault code can be from the TPS or the IPS. I'll have to...
      • 90 DTM TPS-IPS.png
      • 1g TPS Adjust1.png
      • 1g TPS Adjust2.png
      • 1g TPS Adjust3.png
      • 1G ecu pinout.png
    • steve
      steve replied to the thread 1G 90 No voltage to TPS.
      How did you adjust the TPS without having the +5v sensor voltage being there at the TPS?
    • steve
      steve replied to the thread 1G 1990 Idle jumps around.
      • KnowYourThermoHousing1G.jpg
      • ECT Wiring.PNG
      • ECT Testing.PNG
      • 1G Thermostat Housing Sensors.jpg
    • steve
      steve replied to the thread 1G 1990 Idle jumps around.
      Did you check it like was suggested by 91Eclipse GSX back last Thursday? https://www.dsmtuners.com/threads/1990-idle-jumps-around.536513/post-153826704
    • steve
      steve replied to the thread 1G 1990 Idle jumps around.
      Yes. A disconnected ECT sensor causes the ECU to think it very cold out, like -70 something. The ECU believes it has to spray a lot of fuel to get some to atomize and the result is that the floods the engine.
    • steve
      steve replied to the thread 2G Inconsistent AFR.
      A 609 MAF. https://performancepartout.com/maf-sensor-2g-95-99-dsm-609/
    • steve
      steve reacted to motomattx's post in the thread 420a high rpm no acceleration with Like Like.
      I wouldn't go jumping to conclusions on this issue, I have rarely seen a stock converter go bad, especially on a stock non turbo car, the 420a transmission had issues with the shift solenoid pack as it is, the problem could be there, it acting up...
    • steve
      Castle plug and o ring
    • steve
      steve replied to the thread 420a high rpm no acceleration.
      Until it dies...Honestly it sounds like you should park the car now. It could be a safety hazard on the road to you and others.
    • steve
      steve replied to the thread 420a high rpm no acceleration.
      You seem to be bouncing off the walls. Easy to do when your frustrated but never helps.First question should be does your car move freely. So, put the car in neutral on a flat surface and see if you can push it around. Do it again every time...
    • steve
      steve replied to the thread Any Slot Car enthusiasts?.
      Looks like HO and like the old Aurora Pancake motor.https://www.autoworldstore.com/collections/xtraction-slot-cars-ho-scale https://www.autoworldstore.com/products/auto-world-xtraction-r28-1995-mitsubishi-eclipse-ho-scale-slot-car
    • steve
      steve reacted to Turbolence56's post in the thread 2G Had ngk 9es’s and stuttering with Like Like.
      Update.Replaced the driver side axle. Plan to do the passenger side in a few weeks when I have more time. No more shaking noticed. Also fixed some boost leaks and some exhaust leaks. Found some splits in my wastegate vac line off my boost...
    • steve
      steve replied to the thread 1G 1990 Idle jumps around.
      You lost me, sounds like your now talking about the adjustment for a 2G IPS.
    • steve
      steve replied to the thread Any Slot Car enthusiasts?.
      I built and raced 1/24 scale cars back in the 60's and 70's. My buddy held a couple of world records on the Blue King. Back then we learned how to do everything from building chassis to winding electric motors.
      • American Blue King 155.jpg
    • steve
      Welcome to the site.Please fill out a profile on your car to help people know about it and save asking the same questions over and over.Depending what you have there are lots of threads here on diagnosing the fuel pump and general startup issues.
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