I have a question about the detonation suppression system on the Paxton SN2000 kit on my 89 Formula 350. It has been sitting for about 5 years in the garage. The brass fitting that screws into the inlet ducting in front of the throttle body was plugged with what looks like dried up washer fluid. So I cleaned it out and found out the washer fluid pump had failed. I replaced the pump and replaced the o rings in the check valve. Grounding out the activation switch netted no flow through jet. I filled the cavity where the brass fitting screws in and let it sit overnight with brake parts cleaner, carb and choke cleaner and keno kroil with still no flow. Then connected tubing and filled with kroil and connected to air compressor blow gun and blew 100 psi through and found only slight bubbling coming out of jet. Then I soaked the entire inlet ducting in carb cleaner for 2 days and still no difference. I tried to remove the jet from the duct but it is very tight and I’m afraid I will split the ducting trying to remove it. Does the jet come out? I also don’t see how the fluid goes into the jet. It appears solid brass inside. I’m not sure what to do next. Please help me out if you can. Thanks.

 

Still no luck getting any flow. I built an adapter of fittings from 1/8” pipe thread and connected a garden hose to the inlet jet. Pretty much nothing. I’m going to leave it connected overnight with the duct facing up to see if it fills up. Can this jet be removed from the ducting? Does anyone know if the ducting with the jet is available? Would I be better off going with some other methanol injection kit or something like an MSD boost timing box? Any help would be appreciated.

 

that sounds like a meth injection setup......? i have some experience with an alkycontrol.com system that has a map sensor monitoring engine vacuum/boost, and an adjustable pump driver that runs the pump. the pump itself is a water pump that might be used in an RV, and that pumps into a nozzle in the intake. many of those kits utilize the factory washer fluid tank as a reservoir.

i think if you have an unfixable jet, i would look at getting one from the other vendors provided they have a similar sized orifice. does your setup use an actual washer pump like what came in the car?

 

Thanks for responding. It is the basic kit that came with the Paxton kit which judging by everything I read on these forums is garbage. It is basically a cheap washer fluid pump that has what they call a Hobbs switch that mounted on the plenum that closes at around 1.5 psi of boost. The jet is threaded into the intake ducting which I believe is aluminum. I have attempted to remove the jet but it is really tight and I’m afraid to split the tube if I would have to use enough force to actually remove it. Since it is an SN2000 which Paxton no longer supports for a TPI car, I may be SOL if I would damage the ducting.

 

You could find any fab shop that can weld aluminum to put in a new bungif it gets damaged. Can find new jets and a new injection pump, meth kits are plentiful.

 

Just wanted to thank you for the response and give an update. I was able to remove the jet from the aluminum ducting without cracking it by putting a 5/8” impact socket on a DeWalt 1/4” impact driver and carefully and slowly remove it. After removing the jet I found there is a fine mesh screen that was completely clogged. I was able to remove it and clean the screen and jet by soaking it for a short while in a can of carburetor cleaner. The jet has a flat head screw that comes out and has 4 small passes in it which I cleaned out with a pick. Put it all back together and flushed it out with a garden hose and was amazed by the amount of mist it created. Then connected the washer fluid pump and found a good stream of mist. Anyone who may still have one and uses it, it must be periodically disassembled and cleaned out. This is the first time in 20 years I cleaned mine. Should work as good as new. I’d suggest cleaning it whenever you do an oil change on the supercharger. Hopefully will finish putting everything back together tomorrow and take it out for its first real spin in almost 6 years.