hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

Hi I was informed that I should ask mpgmike and that there was a lot of information that may help me with getting better mpg with my hho system.I have 2004 silverado crewcab 1500 4wd 5.3 liter.I am using three 64 oz canning jars with s/s rods with s/s plates.I have a mixture of six 1/4 tsp of lyie premixed in one gal of dist water.I have had the four o2 sensors rapped in aluman foil in hopes to make the ecu think that mix was to rich that did not work.I instalded foilers that extened the o2 sensors about one inch out of the pipe that did not help get more mpg.I instalded a map sensor enhancer but ever time I came to any incline the ecu would mean constant attands and no better mpg.I also tryed using a map sensor enhancer on maf sensor but that also did not get better mpg.I also tryed  cut off air that went in to the air filter box hoping to make the ecu think that it nead more air but that did not get more mpg.I also made two venturis and had them in to differant locations in the mass air flow tube and no better mpg.I also put on a dual EFIE but the mpg turns out to be the same with it on or off and it did not work right so I just know was able to get some money to send it back to get it fixed.Right now the only other thing that I am using besides the hho is a tornado that gose in after the maf sensor I also attached a plastic cuting board around the tornado in hopes of make k&m system.I have heard of volo performance chip that sounds good but cost $60.00 and with my income been cut $400.00 recently it is hard to buy it.I have had my truck up to 22. mpg but can not get any higher and keep it the ecu makes sure of that.I do know that when the hho is allowed to work like it is sappose to the engine runs so smooth and quited it seems as of it is not on that is untell the ecu catchs on.I have been using hho for a year.

Thank you for any help.

like0

Comments

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

diamondlarry's picture

Welcome to our humble forum. I'm glad to see you found your way here. I hope you find solutions since there is a lot to read here and some pretty knowledgeable folks here including mpgmike that I mentioned to you a few days ago.

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

there 7-13-09 n/e breeze

46.3 miles 2.2 gal 21.5 mpg

back east wind

46. m 2.2 g 21.5 mpg

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

there 7-14-09 e/s strong wind

50.6m 2.5g 20.5mpg

back e/s wind

46.4m 2.2g 20.8mpg

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

mpgmike's picture

Welcome to our forum. Firstly, I need to post the disclaimer that the glass jar HHO systems as far as I'm concerned are DANGEROUS! I don't at all recommend them.

Now with that out of the way, let's get down to business. Your '04 uses the post cat O2 sensors to determine the temperature of the cats. If the temp drops below a set point, the ECU dumps excess fuel to get the cats back up to "normal" temps. The easy fix is to splice a 1/2 ohm resistor in one of the 2 heater wires going to the down stream O2s. The resistor can be 1/4 watt. You'll need one for each sensor (in other words, 2 required).

Next, you're at a disadvantage with no EGR system. HHO works better on engines that use EGR. Nevertheless, you need to advance your igniton timing about 4 degrees to get some good gains. This can be accomplished by putting resistance in series in the air temp sensor circuit (to show colder air). The best way would be to get a 1k ohm multi-turn pot and wire it in. This makes it adjustable.

With these mods, use the MAP Adjust (LM317 adjustable voltage regulator) and change the VREF by about 0.10 volts. I can't remember if yours needs to go up or down. To find out, check the signal voltage with the key on but engine not running. Next start the engine and check the voltage. If the voltage went up when you started it (like 1.7 volts engine off to 4.5 volts engine running), then you need to raise the VREF from 5.0 volts to about 5.1 volts. If the voltage goes down (like 4.7 volts engine off to like 1.5 volts engine running) then you need to lower the VREF from 5.0 volts to about 4.9. The EFIE isn't going to be of much use on your vehicle because it does a start-up recalibration. If you have the EFIE set at 0.200 volts, then 0.200 volts becomes the new zero. Switching point raises to 0.700 volts instead of the normal 0.500 volts.

This should get you started. Good luck.

Mike

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

first thing first lets get these five post up.

there 7-15-09 west wind strong

47.1m 2.2g 21.7mpg

back west wind stong.

46.1m 2.2g 20.7mpg

there 7-16-09 west wind strong no bubles in jars.

46.8m 2.1g 21.9mpg

back w/n wind strong.

46.2m 2.2g 20.9mpg

extral trip 7-17-09

92.4m 4.4g 21.1mpg

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

there 7-17-09 w/n wind strong

46.9m 2.4g 20.mpg

back w/n wind strong

46.2m 2.3g 20.4 mpg

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

Hi Mike I went out and got the 0.47 ohm wirewound resistors.

I asked about that lm317

I have map enhancer that dose not have a lm317 can I use it on my egr my haynes book say that my truck has one.

If can not use my map enhancer can you tell me were I can get one of those map adjust that has lm317.

I have some pictures of what I have that I have down sized to fit on this forum but I do not know how to attach them.

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

Will today I put on the resistors I hope I put them on the right wires.

I put them on the wire that had the two lines with anther one at a anlge going through them on the diagram showing it going to the ho2 hi on the ecu.

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

mpgmike's picture

duh1 wrote:

Will today I put on the resistors I hope I put them on the right wires.

I put them on the wire that had the two lines with anther one at a anlge going through them on the diagram showing it going to the ho2 hi on the ecu.

On your silverado, the heater wires are the ones that are 2 of the same color at the sensor. You should have blue, white, black, black. The black wires are the heater wires.

As for the LM317, I got the drawing off a Jeep site. You may not have an adjustable voltage regulator. Some of the MAP Adjust gizmos simply bleed voltage from the signal wire off to ground. This isn't so bad on vehicles that use lower voltage to show lower load (higher vacuum), but on vehicles that work backwards (which your Silverado may do) you are going the wrong way.

Mike

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

Opps I boleave I put them on the purple wire on the wire bundle and that gose to the blue wire on the o2 sensors.

I,ll go out in morning and switch them to one of the black wires.

The next ? is dose it mater which black wire.

Thanks again.

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

If and when get the right wire will I see better mpg with just the resters or do I need to have that lm317 map ajuster.

I have been use my map enhacer but still in under 22. mpg.

Today I with switch the map enhacers wires on the iat air coolent sensor to see if works.

thanks again

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

mpgmike's picture

You're talking purple wires, which would be the signal wire in the vehicle harness, and I'm talking black wires, which would be the wire colors at the sensor. Make sure you understand what I'm suggesting you do.

I would suggest going back over different threads in the Computer Modifications section and other related areas to see what others have been trying to accomplish. For me to teach you from near scratch would be more than this post would allot. Please take the time to educate yourself.

Mike

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

duh1's picture

Actuly Mike I am putting them on the harnes wires because it easer for me to put them there that is where I had the efie.

Sorry that I took up your time.

Thanks for the heads up on the resisters on the down stream after the cad.

I did go out and had the radio shack guys get the parts need to make that map adjuster with the lm317.

Thanks again and the for last time I.ll just keep looking around and not ask ?s. See you around.

like0

Re: hho,ecu,2004 silverado crewcab 1500 4wd 5.3 liter

mpgmike's picture

I didn't mean to try to chase you off. As you're reading, and you have questions, please ask. I forget things. By going back and reading existing posts, you get the full information as it was presented. The best I could hope to do reiterating information is give you an abbreviated version. I'm not lazy, nor am I arrogant. I think I came across that way, and I appologize. YOU will get so much more by searching.

Best of luck.

Mike

like0