Just replaced my AEM fpr with a B&M unit. Thinking that was the cause of my stumbling. Anyways with the AEM the FPG needle would vibrate a little. Thought that was normal all along. Put on the B&M and the needle sits pefectly still. Man what a difference. The AEM sure looks nice compared to the B&M, but bump that it sucks.

 

wow, was the aem unit defective then?

what were the symptoms?

 

The AEM wasn't defective i don't think. The needle only vibrated +/- 1 or 2 psi. Now the needle sits still.

 

So you didn't have a problem with the AEM fuel pressure regulator? You just had a problem with the AEM guage?

 

No never had an AEM guage. The AEM FPR caused my allowed my gauge measurments to vary a little. With the B&M the fuel pressure stayed constant, 40psi on the dot.

 

Oh...thought it was the diaphragm that was weak. Either way i'm happy with the B&M.