I have discovered injector off coasting! [ Archive] - GasSavers.org - Helping You Save at the Pump

Just like I said, if my lock-up solenoid is in full lockup then I can take the foot off the pedal in gear and the injectors will shut off, how fantastic!

This may suck for those of you with partial lock-up, but it should be easy enough to figure out when you're in full lock-up.

all hail superMID and the knowledge it spawns.

Yes, if only I could stick this electronic vss in my tranny and get the instant going.

You can also tell when your ignition is shutting off by tuning to an unused AM frequency on your radio. With the volume turned up, you can hear a light sputtering noise generated by the ignition system that changes with RPM. This noise drops out entirely as you head down a hill in gear with your foot off the accelerator. At least this detection method works on my 02 Honda Odyssey and my 92 Civic.

Haha, that's rediculously clever. I'm glad I have the superMID cuz I wouldn't be able to put up with that ****.

I'm going to have to try that.

You can also tell when your ignition is shutting off by tuning to an unused AM frequency on your radio. With the volume turned up, you can hear a light sputtering noise generated by the ignition system that changes with RPM. This noise drops out entirely as you head down a hill in gear with your foot off the accelerator. At least this detection method works on my 02 Honda Odyssey and my 92 Civic.

That kind of doesn't make sense. Why would the ignition shut off unless you're saying that fuel injection shuts off when you have your foot off the gas. Is that what you're saying????

Just like I said, if my lock-up solenoid is in full lockup then I can take the foot off the pedal in gear and the injectors will shut off, how fantastic!

This may suck for those of you with partial lock-up, but it should be easy enough to figure out when you're in full lock-up.

Please explain partial lock up and full lock up. Also what are your rpm when your injectors shut off?

Hey do the plugs keep firing when the injectors don't inject any fuel??

Hey do the plugs keep firing when the injectors don't inject any fuel??


Honda ECU's simply cut the ground to the injectors on 0% throttle decel. The ignition is still firing inside the dry cylinders though.

Honda also uses a fuel cut instead of an ignition cut for the rev limiter.

Please explain partial lock up and full lock up. Also what are your rpm when your injectors shut off?

From what I understand full lock up is when the torque converter is fully engaged, which happens around 38mph on my car, but partial lock up, which I don't have, is just some fraction of torque converter usage during lower speeds when the torque converter cannot function fully engaged. It's not a matter of rpm, it's just if the LUS (lock-up solenoid) is engaged, which is over 38mph usually.

everyone with an auto tranny has "partial lockup" as you call it :)

once the engine is spinning, and you are in gear, there isn't anything anyone can do to get out of partial lockup other than shut down the engine, put the tranny in neutral or hit a steady 38mph(for you svo) and go into full lock-up.
Lock up solenoids are also commonly called torque converter clutches(TCC)

I am commenting on the fact that obd1+ honda ecus have two (or more) lock up solenoid controls, one is full lockup and the other is partial lock up.

Please explain partial lock up and full lock up. Also what are your rpm when your injectors shut off?

From what I understand full lock up is when the torque converter is fully engaged, which happens around 38mph on my car, but partial lock up, which I don't have, is just some fraction of torque converter usage during lower speeds when the torque converter cannot function fully engaged. It's not a matter of rpm, it's just if the LUS (lock-up solenoid) is engaged, which is over 38mph usually.

I finally have an answer!!! 2 years ago I asked this same question on another board and was told my transmission was slipping. I new that was bull**** because going up hill at 52 the TC would disengage once, the car would slow, then twice for the TC (each time about 500 RPM), then if necessary, kick down to 3rd. This is normal! Thanks SVO! It doesn't happen often anymore because I don't climb hills like on the Kansas side by the river, nor do I give it lots of throttle input anymore. I just wondered why it did this. Partial L/U must give you a little extra power without sacrificing all torque engagement. Brilliant I say! W00T (I know it's been a while since that statement, but 'tis appropriate).