2004 hesitation
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Joined: Nov 2013
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From: Jasper GA
2004 hesitation
I'm having a problem with my 2004 with multiple symptoms making me suspect the fuel pressure regulator. I need to confirm with a pressure test, but I'm also doing some searching and coming up with mixed results. Some say that the 03-04 have the fuel filter/regulator as an integrated unit on the frame while others say it's all in-tank. Can anyone definitively say what the 04's have? I have the downloaded service manuals and I'm digging through them, but I'm lacking an index.
- hard starting after sitting for a couple days
- skip/hesitation under acceleration at low rpm
- occasional stumble at idle
- seems to run fine once the rpms are above 2k
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,615
Likes: 4,062
From: Cape Coral, Florida
The 04’s have the filter in tank…look at the RPO codes on the sticker in your glovebox…if it says FFS it’s in tank…do you have a scan tool ??…if you do I can probably help by looking at some live data…if not you will only be guessing and that can get expensive…first try cleaning your MAF and Throttle Body..any DTC’s ??…they can be retrieved through the DIC.
Last edited by C5 Diag; Mar 22, 2022 at 09:22 AM.
Thread Starter
Pro
Joined: Nov 2013
Posts: 518
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From: Jasper GA
Well it does not have FFS but it is definitely an 04. A little digging says that code was in 03 and showed a revised fuel system, so I assume the 04 didn't need this code. I pulled the DTC codes and nothing current except my intermittent tach signal. No scan tool, but I will try cleaning the throttle body and MAF first. I do know someone with a scanner, hopefully I can get over there and see what's going on. Thanks!
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,615
Likes: 4,062
From: Cape Coral, Florida
Well it does not have FFS but it is definitely an 04. A little digging says that code was in 03 and showed a revised fuel system, so I assume the 04 didn't need this code. I pulled the DTC codes and nothing current except my intermittent tach signal. No scan tool, but I will try cleaning the throttle body and MAF first. I do know someone with a scanner, hopefully I can get over there and see what's going on. Thanks!
