I'm having issues with my old round tank SMC kit with dual nozzles. I've been fighting knock issues and have ruled out everything but the alky setup. I've read through some other forums where guys have talked about minimum pressures for this kit being somewhere around 75psi. I read 30 is around the pressure that the switch picks up for the "SPRAY ON" LED to come on. I was getting around 28-30 but never got the spray light. I found more threads where the old setups used a Chrysler fuel pump E7012 so I ordered one and changed it out tonight. Now I'm only getting 25psi. At idle while pressing the spray button, it doesn't even bog the motor down now like it did before.
I measured voltage at the pump connector going into the bottle and get 12V no matter where the "Pump Speed" knob is set. Is this just pulsing the voltage? Seems like it would vary voltage based on knob setting.
Does anyone have any ideas on where to look from here? I'm stumped and would like to get this working again. Could it be a blockage or would that cause the pressure to increase even more? Don't know if these pumps have some sort of dead-head protection where they bypass internally with excess pressure?
My next plan is to remove the charge pipe and look at the nozzles and try to watch the spray...
I measured voltage at the pump connector going into the bottle and get 12V no matter where the "Pump Speed" knob is set. Is this just pulsing the voltage? Seems like it would vary voltage based on knob setting.
Does anyone have any ideas on where to look from here? I'm stumped and would like to get this working again. Could it be a blockage or would that cause the pressure to increase even more? Don't know if these pumps have some sort of dead-head protection where they bypass internally with excess pressure?
My next plan is to remove the charge pipe and look at the nozzles and try to watch the spray...
