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Old 07-22-2006, 07:50 PM   #1
steelhead
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Question Alky Problem

Okay, I am baffled
I am running an SMC alky kit and the pump will stop working complety after 30mins or more of constant driving. Every time for the last week that I go on a prolonged drive (usaually on the highway) the pump goes dead. I still have a green light on the controller, but I press the test button and no spray. I confirm by stopping and holding the rpms at about 3k and hitting the test button again to see if it will bog the engine, but nothing. It doesn't seem to matter what the ambient temp is. The only constant is the prolonged drive.

If I then stop for about 5 or 10 mins the pump will operate again. WTF

Does anyone have any idea what is going on or had anything similar happen?

Thanks
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Old 07-22-2006, 08:26 PM   #2
hippy
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Old 07-22-2006, 08:44 PM   #3
steelhead
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Thanks but when it happens the pump is not even trying, it is dead like someone flipped a switch off.
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Old 07-22-2006, 09:14 PM   #4
hotrod
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It sounds like a thermal cut off safety in the pump (some pumps have them to prevent overheating).

Is the pump mounted where it gets very hot during a long drive?

Larry
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Old 07-22-2006, 09:24 PM   #5
steelhead
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^^^ Thats what Steve at SMC was thinking but now he is not sure as it is happening on cool days. It just started happening last week and I have had the kit for a year now and never had this problem before.

Edit: The pump is mounted on the washer bottle under the hood.
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Old 07-22-2006, 10:20 PM   #6
hotrod
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Is the circuit feeding the pump protected with a circuit breaker?

If you have a VOM (volt meter) try to test if there is voltage at the + terminal of the pump when it is supposed to be running but fails to run. If there is, than the pump is toast, if not then your circuit is going dead for some reason and you need to check for shorts or opens and bad switches fuses/circuit breakers for a start.

If you don't have a volt meter, simply wire a light bulb in parallel with the pump, if it comes on but the pump is dead then its a bad pump. If it fails to light, when the pump is coming on your not getting any current to pump and you have a wiring problem.

Larry
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Old 07-23-2006, 12:36 AM   #7
STi Crazy
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Quote:
Originally Posted by steelhead
Okay, I am baffled
I am running an SMC alky kit and the pump will stop working complety after 30mins or more of constant driving. Every time for the last week that I go on a prolonged drive (usaually on the highway) the pump goes dead. I still have a green light on the controller, but I press the test button and no spray. I confirm by stopping and holding the rpms at about 3k and hitting the test button again to see if it will bog the engine, but nothing. It doesn't seem to matter what the ambient temp is. The only constant is the prolonged drive.

If I then stop for about 5 or 10 mins the pump will operate again. WTF

Does anyone have any idea what is going on or had anything similar happen?

Thanks
Sorry to hear about your problems with the SMC kit. I have the same system but have the Spec C tank. Hopefully it won't have the same issues.

Thought you'd like to know the the ACPT is installed and it's perfect for track use (as I thought) - especially throttle response through the corners and keeping the revs up exiting. So while not a "power" mod in terms of adding HP, makes the car run "quicker" if you know what i mean! Plus, it's a great supporting mod later should I want more power!

Good luck with the alky! Can't wait to install mine and get retuned.
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Old 07-23-2006, 07:29 AM   #8
TSUNAMI_STI
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i have the same kit and until now all is working great, i live in puerto rico which is hot 90% of the time and never had that problem. you can try using some sort of thermal shield to protect the pump or what i did was eliminate the rubber trimming from the hood and raise the hood using washers or spacers about 1/4 - 1/2'' at the hinges to eliminate lots of the engine heat.

my 2cents
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Old 07-25-2006, 10:56 AM   #9
klattery
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The SMC kit has a spray light that showns when the pump is spraying at 30psi or more. If I read you correctly, the spray light comes on when you push the test button before your extended run, but no longer comes on after the extended runs?

If so that would seem to indicate some kind of short caused by the heat. So I'd look at what hotrod says to identify where the short occurs.
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Old 07-25-2006, 02:06 PM   #10
steelhead
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[quote=klattery]The SMC kit has a spray light that showns when the pump is spraying at 30psi or more. If I read you correctly, the spray light comes on when you push the test button before your extended run, but no longer comes on after the extended runs?
QUOTE]

Correct. I am taking the pump out and sending it to SMC so they can test it, and then move forward from there before I pull any more hair out trying to figure it out.
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