Tuning tomorrow morning. Please help with a few problems

[ForcedTorque]

OK, I have an appointment to get my car tuned tomorrow (1/26) morning. But my car still has several issues, and work has kept me away from working on it this week to be ready. I'm gonna list the problems. Please let me know if they should stop tuning, and let me know how I can fix it. I will be up early trying my best to make it to the 9AM tuning.

1.Tach does not work! Very new problem, and it affects the stock and NEO tachs. I cut my soldered wire and tried several different ways of reworking that, including just reconnecting it stock without the NEO wiring. It seems it is not getting a signal. I don't know where the signal comes from.

2.Speedo cable is broken. I'm paying Tubbie for a replacement tonight, but it won't be fixed by tomorrow.

3. Temp gauge doesn't work. It never worked on this motor in my other car either. I'm not sure which sensor fixes this, but I have a spare thermo housing so I have whichever sensor I need.

4.Oil pressure gauge not working now or in old car (2 diff clusters, so these are probably not gauge related). I have a spare sending unit, but not sure I have time.

It's 11:30 here now, and I will be up at 6, with 2 hours to make repairs and a decision if I'm going. I'd be out there working on it now, but it's 35 degrees and raining right now. Hopefully it will stop raining by the morning. I will also be swapping the plugs and replacing the coolant line under the throttle body as well as trying to fix some of these problems. I could search some of these answers, but a few hours sleep would be nice for a birthday boy (cool to share it with SC). Thanks for any help you can be. I know, the tuning will probably not have a good chance, but I'd like to try.

 

[Supracentral]

Well the dyno will provide #'s 1 and 2 for you, so don't sweat those.

3 & 4 are something I'd rather see an aftermarket gague on anyway. C & H really don't tell you much about temps, something with numbers will do a whole lot more for you, and that stock oil pressure gauge is a real POS.

P.S. - Happy birthday

 

[ForcedTorque]

Thanks for the quick reply! Happy birthday yourself. BTW don't sweat the age thing too much. I'm 2 years older than you.

Should I worry about the 2 gauges for the dyno tomorrow? I really want this car tuned and a little more driveable. I can get some aftermarket gauges this week sometime. Maybe even buy them at the shop tomorrow. I was searching tach signal just now and see they can get it at the ignitor. So now I'll rest a little easier.

 

[Supracentral]

A dyno session is hard on a car. Harder than the street by far. No matter how many electric fans we pile in front of a car, the airflow isn't the same, so temps matter a lot.

Oil is the lifeblood of your motor. So that gauge is also a must.

I'd put extra effort into getting those two gauges before you dyno. It would be a damned criminal shame to lose a motor due to something that trivial.

 

[noah89t]

get good aftermarket oil and water temp guages. not that autometer crap. did i just type what i was thinking? oh, well, it is what it is.:biglaugh:

 

[wiseco7mgt]

hi , i hope i can help somewhat with a couple of your issues.
1.The tach wire is black and it comes from your M1 connector on the ecu, check voltages at this point first its probably the easiest, if no voltage here trace back to your ignitor.

2.The water temp wire that runs to your temp sender on the thermostat housing is useally yellow with a green stripe on all the toyotas ive played with so far, check the corresponding sender and swap if needed.
have fun on the dyno, hope you pull big numbers safely.

 

[wiseco7mgt]

oop sorry forgot to tell you that the oil pressure wire is also on the M1 plug(small yellow plug on the ecu,pre 89)
its yellow with a black stripe.:biglaugh:

 

[MK3Brent]

Don't dyno if the AFC isn't getting a rpm signal... You won't be able to tune anything.

 

[Jostar]

Don't dyno if the AFC isn't getting a rpm signal... You won't be able to tune anything.

I was about to post the same answer you just posted, The neo needs a rpm signal to make adjustments.

 

[ForcedTorque]

Looks like any chance to dyno is out. With the advice given here, it looks like I have more work than I can handle in a couple of hours. It's still raining and in the mid 30's thank God, or I'd be out there doing my best to fix it all.

THANKS for all of your help!

Any other suggestions are still welcome. I will be addressing these issues as soon as I get the chance.