I installed an Aeromotive A1000 pump, filter and bypass regulator last summer. Yesterday I lifted the car cover off the car and blew the dust off of it so I could fire it up after a long winter. As soon as I flicked the switch for the fuel pump it made all kinds of starnge sounds and the fuel pressure gauge that normally reads 7 psi on the nose was now reading 15! I called Aeromotive and the explanation I was given is that they are now running a higher alcohol conent in pump gas and that has caused a breakdown of the adhesive which mounts the pump motor's magnets to the case. They think the adhesive is letting go and is allowing the magnet to rub against the armature. Has anyone else had this problem? I've only used the pump a few times last year before putting it away for the winter. Now they want me to ship the pump back to them and pay $100 U.S. to have them replace the motor with an updated design. Arrrggggg. What a pain in the ars. I'm going to pull the whole fuel system apart and see if I can find out if there is any other explanation for this. Just wondering if any one else may be able to shed some light on the subject? Thanks!

 

Im trying to remember if the A1000 is the same as part #11101?

Anywho i made this post in LT1 Tech before:
http://web.camaross.com/forums/showt...threadid=66096

 

Thanks for the reply. Yes, the part number for the A1000 is 11101. Has your rebuilt pump performed flawlessly ever since you got it back from them? They want to charge me $100 to rebuild it. Does this sound right? I was thinking that I shouldn't have to pay anything at all. Heck, I only used the pump like 10 times.

Thanks for your help. Nice to know I'm not the only one this has happened to. I'm going to pull the pump apart and see if it really is what Bret from Aeromotive says it is.

 

Definetaly take it off and check those two items to make sure that it is the older model. I cant say that it will fix your problem, as my problem was cavitation which was the result of using the wrong filter medium

 

How about because the pump is a piece of junk and they’re all noisy and seems like they all eventually break…

FWIW, I don’t believe that the allowable alcohol content in gas has been changed (it is required to be labeled as having alcohol in it if it’s over a certain limit), and for that matter, as little as 10% would be enough to mess with your engine tune.

I’ll add that it seems to me that this is something that the thing should have been built to withstand (some racers will run up to about 20% alcohol in their gas to raise octane and for other assorted reasons), and if they fall apart it’s not you’re fault that they built it wrong in the first place (ie, make them pay for it or try to return it).

 

Thanks WS6 TA! I was thinking the same thing. Why should I have to pay for their crappy design flaws? When I go to the track I run race gas which has more alcohol content anyway. Why wouldn't they design a high performance pump (that they know will be used on race cars) that's suitable for race fuel? Now that I think of it though, I beleive our pumps here in Ontario (At Sunoco stations anyway) say that they can include up to 10% alcohol content. You are correct in that it will definetly have an effect on engine tune. I'm going to install an air/fuel ratio gauge to check this out.

KMOOK: Are you running the 12301 filter? What medium were you using? Just wondering if maybe I have the same problem. Although it ran just fine last season. The problem just became apparent the the other day when I fired up the pump for the first time after winter storage.

Thanks for your input guys.

 

The 12301 is a paper element and designed to be run after the pump. The 12304 is a metal element and designed to be run before the pump.

I had the 12301 before the pump, therefor cavatating it.

 

Very interesting. I am currently running the 12301 before the pump. I wonder why it seemed to work fine last season and now it doesn't? Very strange. I will definetly look into it though. You've given me a ray of hope! Thank you!

 

A further breakdown-
The 12301 is a paper 10 micron element that needs to have pressure forced through it, if you put it before the pump (like we did) it can easily cavitate it by starving the pump.
The 12304 is a stainless steel larger 100 micron element and designed for fuel to be pulled though it.

If your looking to keep the filter where it is before the pump, just order the SS 100 micron element part #AEI-12604.


Glad i could give you some hope

 

I've run that pump in a couple of cars. The one in my Camaro did exactly what they said might be the problem with yours; magnets/motor just fell out of it, leaving me stuck on the road with no way home and nowhere to pull over.

I bought a new unit from my dealer/friend and sent that one back to Aeromotive for a warranty replacement. Not only do they not warranty it they charged me $145. (with freight) to repair it, spouting the same gasoline story.

I will never buy another pump from them. Mine was only a couple of months old and had maybe 500 miles on it.

Jody