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post #1 of (permalink) Old 04-25-2019 Thread Starter
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Help with my 2003 Impala

A few days ago I was driving and noticed the car running sluggish. I noticed it wouldn't get over 3500 rpm. So I took it home and parked it. Didn't have time to look at it that night. The next day it wouldn't start.
Everytime I try to start it it starts to go then kills immediately. I asked around and everyone told me its the catalytic converter. So I cut the cat off and it still won't start.

I'm kind of at a loss right now. My next attempt is going to be the MAF sensor I think. I don't want to put a ton of money into it.

Any ideas?
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post #2 of (permalink) Old 04-25-2019
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Quote:
Originally Posted by ajdevall View Post
A few days ago I was driving and noticed the car running sluggish. I noticed it wouldn't get over 3500 rpm. So I took it home and parked it. Didn't have time to look at it that night. The next day it wouldn't start.
Everytime I try to start it it starts to go then kills immediately. I asked around and everyone told me its the catalytic converter. So I cut the cat off and it still won't start.

I'm kind of at a loss right now. My next attempt is going to be the MAF sensor I think. I don't want to put a ton of money into it.

Any ideas?
I was thinking fuel pressure regulator.

Doug

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_

If your socket set is all the same brand, you might be a city slicker.

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post #3 of (permalink) Old 04-25-2019
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Garage
Is it throwing any codes?
Start with the basics. You know you have spark because it is firing. Air shouldn’t be a problem.
I agree with Doug, could be fuel. Rent a fuel pressure tester from an auto parts store and check the pressure key on and also cranking/firing.
Also check the connections of hoses/wires on the throttle body.


~Joe~

04 Impala LS

Engine: ZZP PCM, ZZP Downpipe, Xcelerator Resonator, Dual Xcelerator Mufflers, 4" Stainless tips, 180° t-stat, Shorter Dogbones, Mount Spacers, Optima Red Top Battery
Trans/Drivetrain: TransGo shift kit + preloaded accumulator
Suspension: BC Racing coilovers, Police LCAs, Police Rotors and Pads, Boxed trailing arms, Dorman front solid sway bar
Exterior: LED Headlights, Red LED license plate lights and side markers
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Blue LED cluster+HVAC+door switches, LED interior
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post #4 of (permalink) Old 04-25-2019 Thread Starter
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The only code I'm getting is a P0480 code. But I only have a cheap reader.
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post #5 of (permalink) Old 04-25-2019
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P0480= cooling fan#1 control circuit malfunction. Cat codes would be: p0420 (bank#1) and/or p0430 (bank#2).
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post #6 of (permalink) Old 04-25-2019 Thread Starter
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Quote:
Originally Posted by plano-doug View Post
I was thinking fuel pressure regulator.

Doug

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Swapped out fuel pressure regulator. No dice.
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post #7 of (permalink) Old 05-02-2019
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I’d look at the fuel pump or fuel pump relay.


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