[Jeebus]

Well I finally got my car to the dyno after working on it for the past 3 years. The tuner and I spent most of the morning trying to get the car to start as it's all been entirely rebuilt and this was it's birthday. Well after many starting attempts to get it running I noticed water pouring out of the Blow Off Valve.

Well of course this was no good as I had no idea how much water/meth had run back down into my IC. After taking the IC off and dumping out the half cup water out of it I put everything back together.

I was under the impression that the Progressive Controller would not spray until it reached the min boost level on the controller. I assumed I could try starting it all day long with no issues as I wasn't reaching boost levels and wouldn't have to worry about that until I started getting on boost. I would never have thought about it unless I seen the water pouring out of my blow off valve. Luckily I installed the blow off valve on the bottom of the pipe. If it had been on the top of my pipe I would never have known that my IC was filling up with water. There would have been a very good chance I would have destroyed my motor once we reached high boost and pushed all that water in my motor at once. Obviously it was spraying before boost as I hadn't even had the car running yet. I took off the line into the check valve and turned the key... sure enough a good shot of water came out. I didn't want to chance running into that problem again while starting my car so I disconnected the pump and continued to get my car running smoothly.

So I'm looking for some help here.... luckily nothing bad happened initially. I want to run this system as I've heard great things about Meth injection however I need some answers to feel confident.

So what's the story with the controller spraying on start up when the progressive dial clearly shows that it shouldn't come on until around 6 or 7 psi?

Thanks for you help.

Pics of my nearly maimed baby.

[Jeebus]

Well I was hoping to have some answers by now... however I'll keep posting with my findings.

So tonight I did a little investigating. I connected the ground back to the pump and connected my battery. I disconnected the line from the one way check valve an stuck it in a cup. When I turn the key in the accessory position the pump turns on very quick (meaning a shot of meth). When I start the car pump turns on for another blip. As it idles... every so often the pump will blip and spray meth.

The min side of the controller is set on 12.... the max sided is in the 20's somewhere.

So why is this doing this???? Someone must have some answers.

Can someone else monitor theirs on start up and see if it does similar things. I'm under the impression that I should see no activity from the pump until boost.

What gives?

[Rocket468]

If its kicking on sporatic, then it does not have a good connection to the map sensor. Another thing to look for is the map sensor having a weak ground. Or the controller is in 3 bar mode and hooked up to a 2 bar map or maybe even a 1 bar map. But since its just sporaticly turning on this leads me to think its just a loose wire.

What size map sensor are you hooking up to. How many times does the controller blink when its first powered up?

You should not see any activity till boost.

[Jeebus]

Thanks,... glad someone chimed in.

You're very last answer is what I wanted to hear for sure. Now I at least know there's something wrong.


To answer a few of your questions...

1. The MAP sensor has a good ground as the car runs and idles perfect.
2. The MAP sensor is definitely a 3 bar.
3. The Controller blinks 3 times when first turned on I verified this last night.

The only think I'll double check now is the connection to the map sensor wire. Is there any way I can check it? Meaning should the voltage change on that wire on start up? If so... what would be normal and what would make the pump spray? I could disconnect the wire to the map sensor and stick a test meter in the connector to see what voltage it's seeing.


Thanks for you're help... looking forward to getting this fixed.

[Rocket468]

Our controller if it has power, and no signal from the map will give off the phantom reading to it's self. This has to do with our controller reading the voltage but not editing the signal. If your familiar with a multi meeter it will do the same thing when sensing voltage. Number will bounce around till its hooked up and get a signal. Also like how 02 gauges work, the lights just bounce around till you go wot.

Yes it will change on startup. you can check it with a multimeter. For a gm style map sensor 1.8 volts would be aprox 1psi of boost. So you should see aprox 1.4-1.7 at key on.. At an idle you should see less, Probley around 1 volt or less. Depends on how many inches of vacuum your car pulls.

If you have the both knobs turned all the way to the right. It should not turn on till 4.9v All they way till the left would be 1.8 v This is for our controller in 3 bar mode.

I really feel the map sensor not getting its signal to our controller. So its either a loose wire or a weak ground, to our controller or map sensor.

[Jeebus]

Thanks man, really appreciate the finer detailed explanation. I will check all you suggested and post back.

[Jeebus]

Alright I thought I'd post my finding so everyone knows the complete story.

First I ensured all the wiring was correct. Then I checked the connector that clips over the wire on the MAP sensor as it was the only spot where there could be a potential problem. Well... the connector didn't dig through the sheathing so it wasn't getting a signal.

After scrapping some of the sheathing away and putting the connector back on which took all of 2mins everything is working exactly as it should now.

Thanks again for the help, I can't wait to get back to the dyno.

[wrx4mesilver]

I had the same problem, easy fix...

there seems to be a "jolt" of current flying allover when you are starting your car... that split second while staring it up all sensors go haywire...

you can do the same thing i did and install a on/off switch inside the cabin that intercepts current from the battery going to the pump... easy right...

one thing to remember... while daily driving switch to racing... give the pump a few seconds to build up pressure up to the solenoid...

p.s. i don't have a devils own kit... but i just came about this by searching for a better controller for the alcohol kit i have...

<--- without alcohol || with alcohol --->