fuel pressure regulator vacuum diagram..

[Starter986]

Originally Posted by blue62

A few things that could cause your issue........
Bad MAF or MAF wires...and or connections.
Leaking Fuel Injectors.
Bad seal on the Oil Fill Tube Cap
Bad Fuel pressure regulator
Bad Evap Purge Valve under the intake manifold
Exhaust leak ahead of the Pre Cat 02 sensor.

Blue... question...

Would having a Durametric at one's disposal eliminate a lot of "chasing"? I'm halfway familiar with the product, have never used it, but I believe you can see in the app the fuel pressure... bad connections... etc. No?

I ask because I've been considering the enthusiast version. I'm still working on a fuel smell... and that darned P0455 popped again. I've been unable to crawl under the car due to a bad back.

Thank you.

[JFP in PA]

Originally Posted by Starter986

Blue... question...

Would having a Durametric at one's disposal eliminate a lot of "chasing"? I'm halfway familiar with the product, have never used it, but I believe you can see in the app the fuel pressure... bad connections... etc. No?

I ask because I've been considering the enthusiast version. I'm still working on a fuel smell... and that darned P0455 popped again. I've been unable to crawl under the car due to a bad back.

Thank you.

No electronic diagnostic tool, even the almighty PIWIS, can see fuel pressure and delivery, both require a mechanical test with a fuel pressure test gauge.

[blue62]

Originally Posted by Starter986

Blue... question...

Would having a Durametric at one's disposal eliminate a lot of "chasing"? I'm halfway familiar with the product, have never used it, but I believe you can see in the app the fuel pressure... bad connections... etc. No?

I ask because I've been considering the enthusiast version. I'm still working on a fuel smell... and that darned P0455 popped again. I've been unable to crawl under the car due to a bad back.

Thank you.

What JFP said..
Additionally diagnostic tools are great to have.
BUT you need understand the system,part, sensor, circuit that your testing and it's relationship to the other systems, sensors,parts, and circuits.
You also need a good diagnostic procedure... otherwise any diagnostic equipment will just give you another way to chase your tail.