After the AEM one took a crap. I replaced it with one that has a fuel gauge on the fpr itself. Now the psi can be set higher but not lower than 65psi. Plus it doesnt make a difference if the vacumm hose is pinched or not, it stil reads the same.
At wot, it stays at the same psi also.

Any ideas?? 65psi is too rich. Could I have a bad fpr?? Or is it cause of my bosch fuel pump???

Thanx

 

where is it in the fuel system?
what else is in the fuel system?
Is the stock regulator still in?
Are you removing the vac line or just pinching it?

 

Stock injectors, fuel rail, bosch pump. Its next to the fuel rail. The new fpr has an adaptor plate that goes were the stock fpr sits on so you can relocate the fpr. I have it next to the fuel rail, so the lines are not longer. The stock regulator is not in. Im removing the line and pinching it.

Any help would be great..

 

That is a symptom of a high capacity aftermarket fuel pump. I don't know what fpr you are using but the return outlet size of the unit is obviously too small creating a huge increase if pressure internally. I had that happen with one of those BandM style regulators that use half of the stock unit pieces of crap, and I am using a Holley in tank pump, your Bosch unit is even stronger than the Holley unit. The beauty of the AEM unit is you can use different orifice sizes to match the fuel pump capacity so pressure doesn't increase internally like that. But obviously the AEM unit didn't work for you if it quit, mine works great, the best unit I have seen yet. On TOO's board he described how you can drill a small hole into one of those BandM style regulators to allow more fuel to flow out of them to relieve the problem that you are having on cars using the Bosch pump. I imagine you could do that with other fprs if you can take them apart. Or maybe try the AEM again as it seems best suited for such situations, no other fpr considers that problem. good luck.

J.

 

You know, the kit came with a bigger diameter fuel return hose. But my lazy @ss left the stock one on.
Could it be the smaller one is creating higher pressures???

On my AEM one, I used a bigger orifice size and that's when it took a crap on me..

Thanx