Fuel pump question - Chevy Impala SS Forum
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post #1 of 27 (permalink) Old 09-20-2013, 09:55 PM Thread Starter
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Fuel pump question

Hello all,

My Roadmaster has always been a little slow to start. The car has only 60K miles and runs great otherwise.

I recently put in a new starter, so now the engine turns over quickly, which it didn't do before.

Still, I have noticed occasionally that even though the engine is turning over quickly, the car wouldn't always start right away. I have NEVER smelled gas when this happened.

Other times, the car would start very weakly, sputter and almost die. I would coax it to higher RPMs. Usually once it got going it would keep running.

More recently, it wouldn't start at all until after a few tries. This would happen anytime, but most often after the car had been driven on a hot day and was still warm. Again, NEVER a smell of fuel. All the symptoms of no fuel.

So TODAY, I was driving along just after filling the tank (%^#^^*!!!) it burped and died. I tried many times to start it with no luck. Kicked a few times but that was it. I was ready to call AAA. (I think a AAA membership is a great thing when you daily drive a B-body!)

A guy nearby who was smarter than me got under the car while I turned on the ignition and said he couldn't hear the pump. I tried listening for it from inside the car before he showed up and I couldn't hear it either.

He suggested that he beat on the underside if the fuel tank while I tried starting the car. Started right up.

So here I am. The car has started a few times since at my house with no problem. I think I should replace the fuel pump so I don't get left somewhere else. The problem is intermittent, so I'm thinking checking the fuel pressure while running won't help.

I got under the car while a friend turned on the ignition at my house. Now I CAN hear the pump, but it doesn't sound really healthy. By this I mean weak compared to my impala, which I can hear easily from inside the car.

Of course I'm going to replace the filter while I'm at it.

Am I right, or am I missing something? Should I just put in a new pump?

Thanks


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post #2 of 27 (permalink) Old 09-20-2013, 10:07 PM
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Fuel pump question

Many times they do behave this way,when they're (fuel-pumps) on the way out. Sometimes,they'll work for a while. Usually,the clock is ticking.

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post #3 of 27 (permalink) Old 09-20-2013, 10:10 PM Thread Starter
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Thanks!

That's enough for me. I can't think of a better place or time to change the fuel pump than in MY garage on a weekend.


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post #4 of 27 (permalink) Old 09-20-2013, 11:42 PM
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Changing a fuel pump on these cars is easy. Consider updating with a Walbro 255 and new in tank pump harness.


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96Impala BBB, .600 lift cam, Crane 1.5 RR\'s, Crane dual springs, Accel SupeRam intake extrune honed/ceramic coated...a bunch of other stuff..BV Performance anti sway bars and OBD2 tuning.

now...
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post #5 of 27 (permalink) Old 09-20-2013, 11:56 PM Thread Starter
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Quote:
Originally Posted by Sinister SS View Post
Changing a fuel pump on these cars is easy. Consider updating with a Walbro 255 and new in tank pump harness.
I'll definitely do that on the impala, but this Roadmaster I'm thinking to keep mostly stock.

Can I get a performance improvement from this with no other mods?

I do have a set of SS wheels for it as soon as I wear out the tires on the stock wheels...




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95 DGGM 396 Stroker, Eagle crank & rods, LT4 heads, LT4 intake, LT4 hot cam, Finish Line long tube headers, 2 1/2" exhaust, Big Baer brakes, 3.73 rear, Hotchkis lowering springs, Front and rear Hotchkis Sway bars, aluminum driveshaft, Metco aluminum boxed trailing arms, K&N, Gary's Cables, 42# Green Giants, T84's,T56 Magnum
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post #6 of 27 (permalink) Old 09-21-2013, 12:31 AM
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Fuel punp is on its way out and check the harnnes at the pump to I bet its burnt

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post #7 of 27 (permalink) Old 09-21-2013, 12:49 AM Thread Starter
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Quote:
Originally Posted by coltonx3 View Post
Fuel punp is on its way out and check the harnnes at the pump to I bet its burnt
Will do thanks.


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post #8 of 27 (permalink) Old 09-21-2013, 06:19 AM
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Wink THIS will help...

To save a lot of aggravation, read this: http://www.grail-ss.com/FuelTankPumpGUIDE.htm
- particularly the last part. (Okay, it's mine - but it it helps.)

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Tested a coil by listening to MR.WOODS... ****ing coil WORKS just fine.... ass hole
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Last edited by The Fooser Guy; 09-21-2013 at 06:25 AM.
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post #9 of 27 (permalink) Old 09-22-2013, 10:44 AM Thread Starter
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Thanks EVERYONE for the help!

The fuel pump is in, and I can definitely see a difference in how the car starts.

The advise provided by you all made this job much easier.


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post #10 of 27 (permalink) Old 09-22-2013, 09:31 PM
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hopefully you replaced the in tank harness, or be prepared to do the job over again soon.

9 times out of 10, the harness is the reason for the failure.

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