View Full Version : MAP/O2 sensors

07-30-2008, 10:59 PM
I have installed an HHO system on a 92 Chev pickup 350. I also installed an EFIE card. But upon acceleration the engine still pings alot when HHO is on and regardless of EFIE setting. Have not checked MPG yet but works best set at 0.5 volts.

Do I still need a MAP sensor enhancer as well?

2 generators
water filter housings
13 plates each 304 ss 3X7
30 amps around 1.2 lpm (hoping for 2)
sodium hydroxide

07-31-2008, 12:08 AM
Have you checked the truck's timing? That would be an easy thing to check and adjust.

Carbon buildup can cause pinging type problems, funky gas can too.

07-31-2008, 01:22 PM
No I didn't, but truck runs good with HHO and EFIE off.
What can make the HHO gas funky?

Looking for MAP enhancer if I need it

Ordered a PWM for heat and increase production hopefully.

08-23-2008, 09:23 AM
I found a guy an ebay that has plenty of these in stock at a decent price and super fast shipping. Very nice unit too.


08-24-2008, 11:20 AM
SPAM! Ignore that asshole.

Anyways, you have your O2 set too high. .5 volts is a HUGE amount. You have to remember that the O2 is a 1 volt system.

Back it down to .150 volts and work your way up from there.