What did i do to my SS????
Moderator
Joined: 01-23-2009
Posts: 26,539
From: Fredericksburg,VA
So I guess you reaffirming the fuel pump is the problem. The octane boost was just a coincidence.
Evidently you are not understanding the test. The in tank pump runs for about 15 seconds at key on engine off. The HPFP only runs when the engine is running. The fuel pressure sensor is after the HPFP. So, with the engine running the RPD displays the HPFP "final" pressure, if you turn the key ON but don't start the RPD displays the in tank pump pressure for those 15 seconds. After the engine is shut down the fuel pressure should stay near the in tank pressure for more than 5 minutes. The in tank pressure should be between 50-60 PSI (not sure in Newtons). Kind of like testing the battery then the alternator
Evidently you are not understanding the test. The in tank pump runs for about 15 seconds at key on engine off. The HPFP only runs when the engine is running. The fuel pressure sensor is after the HPFP. So, with the engine running the RPD displays the HPFP "final" pressure, if you turn the key ON but don't start the RPD displays the in tank pump pressure for those 15 seconds. After the engine is shut down the fuel pressure should stay near the in tank pressure for more than 5 minutes. The in tank pressure should be between 50-60 PSI (not sure in Newtons). Kind of like testing the battery then the alternator
Administrator
Joined: 10-13-2011
Posts: 40,096
From: Welland,Ont Canada
Most likely, if the in tank fuel pump pressure dropped to 32 psi it is done.
The in tank low pressure pump
https://www.rockauto.com/en/catalog/...788,fuel+&+air
The high pressure pump
https://www.rockauto.com/en/catalog/...fuel+pump,6256
The fuel line , must be replaced if removed
https://www.rockauto.com/en/catalog/...e+/+hose,11224
The in tank low pressure pump
https://www.rockauto.com/en/catalog/...788,fuel+&+air
The high pressure pump
https://www.rockauto.com/en/catalog/...fuel+pump,6256
The fuel line , must be replaced if removed
https://www.rockauto.com/en/catalog/...e+/+hose,11224
Senior Member
Joined: 03-17-2012
Posts: 1,042
From: Bay Area, CA
Thread Starter
Senior Member
Joined: 07-15-2019
Posts: 158
From: Waterloo, Ontario Canada
Thanks guys for all the input... Im glad to hear you guys dont think its the HPFP, i mean, the engine only has 65k on it... Theyre expensive too,!! Right now the car wont start at all at all.... Turns over no start tho!
Thread Starter
Senior Member
Joined: 07-15-2019
Posts: 158
From: Waterloo, Ontario Canada
Hey blue yes sir i believe i do. Im almost positive i hear it, cuz if i remember correctly i printed it a couple times hoping it would start but it didn't. I removed to battery so ill have to go there it in quickly tree see
Thread Starter
Senior Member
Joined: 07-15-2019
Posts: 158
From: Waterloo, Ontario Canada
UPDATE*
So a couple cool cats came over and swapped out the HPFP and it it did nothing to fix the problem.. turn on the key, you can hear intank fuel pump working, but idk it sounds weird, theres a quarter tank of premium 94 in her... The rpd reads 32psi, it starts, and fuel pressure reads 1100ish but runs perfect until it warms up then FP drops gradually and stalls out. In tank pump guys? It will be up for sale shortly if someone wants to buy and fix it themselves.
So a couple cool cats came over and swapped out the HPFP and it it did nothing to fix the problem.. turn on the key, you can hear intank fuel pump working, but idk it sounds weird, theres a quarter tank of premium 94 in her... The rpd reads 32psi, it starts, and fuel pressure reads 1100ish but runs perfect until it warms up then FP drops gradually and stalls out. In tank pump guys? It will be up for sale shortly if someone wants to buy and fix it themselves.