Aftermarket Intake trouble shooting MPG

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

OP
OP
Matthew Jeschke

Matthew Jeschke

Full Access Member
Joined
Dec 28, 2017
Posts
1,983
Reaction score
1,379
Location
Sahuarita, Arizona
Awesome thanks! I never saw over 50 PSI even with key in engine off. Was around 50 PSI with engine running though (maybe that's cause of my Flex Fuel injector swap...)

I don't know why it bled pressure like it did. Looking a bike pump test to check the system for leaks as well as the check ball.
 
OP
OP
Matthew Jeschke

Matthew Jeschke

Full Access Member
Joined
Dec 28, 2017
Posts
1,983
Reaction score
1,379
Location
Sahuarita, Arizona
This is lovely... So first off fuel pressure it a good 10% too low. Working with Delphi to get it sorted out, pump is brand new warranty replacement. No electrical faults, no injector faults, brand new pressure regulator, and certain no line set issues (blew lines out with compressed air multiple times) and no leaks.

Now I'm on a road trip here and I'm getting 13MPG highway YUCK. One of my friends noticed the right rear rim is HOT to touch. I think it's a brake fault... Brake doesn't seem to rub. However, if I use brakes that rim heats up FAST. So I replaced the rotor on my trip here (inside inner radius was ripped up / bad surface). It seemed to have eliminated the heat issue except for under heavy braking (down mountains). I assume is due to me not also replacing the pads and had warn an ever so slight grove on that inside pad (not flat surface on pad now)... However, he thinks I have a rubbing condition somewhere / excess friction contributing to my decrease in fuel mileage.

Anybody had issues like that? I can spin the wheel by hand. Doesn't seem to be any rubbing and if an issue at all... it's only the right rear tire. And or, elsewhere a friction issue creating a decrease in fuel mileage?
 

Forum statistics

Threads
132,111
Posts
1,862,488
Members
96,598
Latest member
kasauto98
Top