New fuell pump junk
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
Likes: 0
From: Cape Cod Ma
New fuell pump junk
I think the fuell pump I just put in is junk.Or somtin. The car stummbles hard and gets wors when the tank is sort of empty. But car runs works fine on a full tank. I posted this before and someone said it may be water, and I bought a fuell system "formula" that some how removes any water. And i've gone through another tank since then. Everything from the fuell injectors to the pump is new and was working since the new pump.
I got a recomendation to replace the I.A.C to solve a idle problem and both the idle and stummble problem are way worse now after the new one was installed. The T.P.S is set correctly also. For all that I know the new I.A.C is in correctly also.
Any clue's :thumbs:
I got a recomendation to replace the I.A.C to solve a idle problem and both the idle and stummble problem are way worse now after the new one was installed. The T.P.S is set correctly also. For all that I know the new I.A.C is in correctly also.
Any clue's :thumbs:
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
Likes: 0
From: Cape Cod Ma
Re: New fuell pump junk (redfast)
Also the pump makes a verry wired noise(not normal) from day one. And the stummble is apon hard excelleration. But goes away when the tank is full. And dose it all the time now since I installed the new I.A.C. Could someone please tell me the right way of the replacement of the I.A.C. I read the directions in a manuall just in case.
Team Owner
Joined: Jan 2003
Posts: 20,253
Likes: 219
From: Summerland B.C. Canada
Re: New fuell pump junk (redfast)
The IAC only contols idle and doesn't affect mashing the loud pedal. Your pintle must not be extended more than 1 1/8" (from base of motor to tip of pintle) when you install it. The IAC will reset itself. My car will stumble when i'm near empty but gauge shows a few bars. Is this the case, or does it do it everwhere but full.
:cheers:
:cheers:
Race Director
Joined: Dec 2000
Posts: 17,551
Likes: 26
From: El Paso Texas
Re: New fuell pump junk (redfast)
I think the fuell pump I just put in is junk.Or somtin. The car stummbles hard and gets wors when the tank is sort of empty.
You will also get code 1788 (low grammar signal)
:rofl: :rofl:
Seriously though, how many pounds of fuel pressure do you have? Did you change the sock on the pump assy when you changed the pump? Eliminate the water concern....now that you're low on fuel, siphon out the remainder and refill with fresh fuel.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: New fuell pump junk (Frizlefrak)
My car used to stutter bigtime around turns with less than 5 gallons, and sucked in general on a low tank. Then the pump died on the freeway and stranded me.
Since replacing it, and the filthy black fuel sock, I have had NONE of the infamous fuel starvation problems, and picked up some more useable RPMs where the engine started to cutout before.
Since replacing it, and the filthy black fuel sock, I have had NONE of the infamous fuel starvation problems, and picked up some more useable RPMs where the engine started to cutout before.
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
Re: New fuell pump junk (redfast)
Also the pump makes a verry wired noise(not normal) from day one.
Pro
Joined: Oct 2002
Posts: 586
Likes: 0
From: Schmuckville SA
Re: New fuell pump junk (redfast)
Did you bend the hanger excessively when installing the new pump?
Also, you want to make sure that both ends of the pump have ample
tubing from the hanger inserted or you could be sucking a little air there
when you get low. Last thing, did any of the cheesy welds on the hanger
break? I had one broken one and sometimes it makes a weird noise because
it's vibrating against the hanger...Looks like you'll be pulling it again..
Oh ya, the hoses didnt get switched up top, did they????
My 2 cents HTH
Also, you want to make sure that both ends of the pump have ample
tubing from the hanger inserted or you could be sucking a little air there
when you get low. Last thing, did any of the cheesy welds on the hanger
break? I had one broken one and sometimes it makes a weird noise because
it's vibrating against the hanger...Looks like you'll be pulling it again..
Oh ya, the hoses didnt get switched up top, did they????
My 2 cents HTH
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 32
From: The Top of Utah
Re: New fuell pump junk (Frizlefrak)
Pull the codes from the ECM....you will get code 1453 (critical spelling error)
You will also get code 1788 (low grammar signal)
:rofl: :rofl:
You will also get code 1788 (low grammar signal)
:rofl: :rofl:
Those codes may be symptomatic of why the car runs poorly, too. My side is aching.
RACE ON!!!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
Likes: 0
From: Cape Cod Ma
Re: New fuell pump junk (CFI-EFI)
Comming home from work the car was very hard to start and wile driving the car the car dose the same thing as a unpluged mass air flow but twice as bad. Now its to the point I cant even drive it.
Melting Slicks
Joined: Sep 2003
Posts: 3,031
Likes: 74
From: If you don't weigh in you don't wrestle Road America
Re: New fuell pump junk (CFI-EFI)
I had that problem with my 96 and I installed the Racetronix fuel pump for a little under $200, now I can run with 1/8 tank and have no problems. When I put the new pump in I realized that the old pump wasn't down far enough in the trough feed it enough fuel. I would just try bending the lines so that your pump sits down in the tank lower. Otherwise the Racetronix unit isn't a bad way to go.
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 844
Likes: 0
From: Cape Cod Ma
Re: New fuell pump junk (redfast)
I have a fuell press. guage but its not long enough to extend it to the windshield. I need to be able to see the guage wile driving ( i think ) because it acts up when the engines has a load on it when driving.
Im going to replace the fuell pump now. Just to see. The pump had a "warrentee for life"
Im going to replace the fuell pump now. Just to see. The pump had a "warrentee for life"