delay accessory for cold starts

Praise the Lord, someone finally listened and took notice. Raising the revs doesn't necessarily extend the crank time, you might still need to do that, in lay terms it just makes the ignition/start system "try" harder.

tach is AC, for example if you program it with a low rev count of say 800rpm. the unit would sense 800rpm or ~13 cycles per second and during start if it "senses" 13cycles it releases the starter. if you program at 1500rpm, it would look for 25 cycles/sec until it released the starter wire. It doesn't necessarily fully increase start time, more like crank as long as you need, until it finds the programmed tach signal. In simple terms tach = indication to let the brain know when to stop cranking. i hope i'm right on this one.Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

offroadzj wrote: Posted: January 16, 2012 at 2:08 PM Another thing you can try is to bring the RPM's up slightly (maybe to 1200-1500 when programming tach. This way it won't immediately shut off before the rpms are high enough to keep the vehicle running. I have seen that before especially in cold weather.

And all could have been solved back on page 2.... lmao. Just busting your balls OP; no hard feelings.Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

Ooh Kenny that's nasty. I'm the cynical one here and I've already pointed out that I mentioned this on Jan 16th. SO THERE! Ted, spot on you explained it better than me and also pointed out as I hope our original poster noted that he might still have to increase crank time.

Kenny, when you first posted that, i was thrown off because "high enough to keep the vehicle running", the vehicle wasn't running.  Anyhow, i did read back and tried it on the high end of 1500 as you suggested, thanks for the tip.  I still don't think this was a waste, as i still believe that honda battery was no good.

Tedmond, thanks for the explanation.

Howie, i was reading about the crank time, i don't think on the vipers, i can increase crank time while using tach sense.  Crank times are only for voltage sense or non-monitoring.

Thank you all for the sticking in here, i have learned so much, mainly, just pay an installer next time :).

Oh I agree that it wasn't a waste, and that your battery was still part of the issue. I just enjoy busting balls when I can. Glad you got everything worked out.Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

so i had another fail yesterday afternoon: low tach signal error message again.  got in the van, and when i started with the key, i paid attention to the RPM gauge, it would jump as high as 1500RPM and drop to idle at 1200RPM, after a few minutes, it would settle into 900RPM.  On 4 different occasions last night, when i started the van with they key, it would always jump to 1300-1500RPM.  So i have now learn the tach at 1800RPM, hopefully, i won't ever see that low tach signal error again.

The problem you may have with that is during the summer. You may find the car over-cranking in warm weather since the engine will be warm and not require an initial high rpm. It may not happen, but I would still keep an eye on it.Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

Ref: earlier praising the Lord, do you think you could follow my third piece of advice after the battery change and increasing the revs? Extend crank time!!!

P.S. Tach learning at 1800 is ridiculous, don't go more than 1200RPM.