Ok, Like The Title Says, Still Runs Bad After 2nd Fuel Pump. Its A '00 Rcsb 5.3l Started Runnin Bad In December, A Couple Days Later, The Fuel Pump Went Out. Replaced Fuel Pump, Filter, & Injector Service. Ran Fine For About 3 Weeks, Then It Seemed To Have Just A Lil Power Loss Under Normal Acceleration, Would Almost Act Like It Was Misfiring Sometimes. Pulled The Plugs And They Are Whit-runnin Lean, Ok Fuel Restriction. Ran A Bottle Of Sea Foam Through It And Problem Dissapeared For About A Week. Problem Came Back, Started To Run Really Bad For About 5 Minutes & Died. Turn The Key And No Fuel Pump. Replaced Fuel Pump, Removed Tank And Cleaned A Lot Of Trash Out Of It, Put Another Pump & Fuel Filter On It, Another Injector Service, And Blew Out The Fuel Lines. The Truck Is Still Acting Like It Has A Intermittant Misfire And Power Loss. Pulled The Plugs, And They Are White Again. Took It To The Dealership After The 2nd Pump Went Out, To Run A Diagnostic, They Said All It Was Is A Bad Fuel Pump. The Truck Is Basically Stock Except For L/t's, Exhaust, Intake, & Free Mods. Help Please.

 

Oops, I Thought I Put This In Tuning & Diagnostics. My Bad.

 

Is it possible that there is something wrong in the fuel pump wiring that keeps causing the pumps to go bad?

 

Thats What I Thought. Thats Why I Took It To The Stealership. They Said The Pump Was Drawing Too Much Amperage. They Said Nothin Was Wrong With The Wiring. If It Was, It Would Be Blowing Either One Of The Two Ecm Fuses, Or The Fuel Pump Relay, But Its Not

 

Is There Anything Else Im Missing On The Fuel System That Would Cause A Restriction To Make Thepump Run Hard Enough To Burn It Up? Would A Bad Injector Cause This?

 

Will Somebody Please Chime In With Their $0.02 Please? This Is Kickin My ***!

 

I know a guy who went through 2 pumps on his '00 rcsb.

The last time at the dealership, you did mention all of this history when they said it was "just" a fuel pump? Electrically speaking, too much amperage usually means over sized pump or too much restriction on the suction side. Have you flushed the tank? You mentioned alot of "junk". Clean it thoroughly. Real clean!!

New in box fuel pump on EBAY

It's only 2 cents, but an idea.

 

Yeah, I Had The Tank Off, Drained All The Gas, Cleaned It With A Rag & Carb Cleaner, Disconnected The Return And Suction Lines & Blew Them Out With Air, Injector Service......bla Bla Bla....and The List Goes On. Last Night. It Ran Really Bad For About 30 Minutes, I Already Had Someone Following Me Just In Case It Broke Down, And Then All Of The Sudden, It Cleared Out, And Ran Great. Drove Around To See If It Would Do It Again For About 45 Minutes And Not A Problem. There Might Have Been Some Trash In An Injector That Finally Blew Through, Or Somethin. I Dont Know, But I Will Keep Informed If It Happens Again. THE FIRST PUMP I REPLACED WAS OFF OF EBAY FOR $130. WHEN IT WENT OUT, IT WAS WARRANTIED, BUT I JUST GOT MY MONEY BACK END WENT ELSEWHERE. THANKS, THOUGH.

 

When they did the injector service was it in the truck? You're lean on all cylinders or just one?

Did you check your FPR?

 

Fuel Pressure Is Good. I Checked It. Lean On All Cylinders. Put A New Set Of Plugs In After Fuel Sys. Flush Sunday. Checked Them Today And They Are Burnt. All Of Them. Fuel Pressure Is @ 58-60 Psi Revving To 4k. yes they had the truck while doing the injector service. could a bad MAF cause this?