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2000 rpm

398 Views 19 Replies 13 Participants Last post by  MidBubSC, 
M
Any idea as to why the ls motor will only rev to 2000 rpms?
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S
Give us more details because all of mine will rev well past 2,000 RPMS. What has been done to the truck recently? Any repairs or changes made to anything?
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T
Or is there a check engine light on?
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tuckerred1948
Marko said:
Any idea as to why the ls motor will only rev to 2000 rpms?
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Air leak near the throttle body? Internal throttle body issue, bad pedal module, engine seizing up, misfiring on several cylinders, clogged kats, could be almost anything. Most issues like these should throw codes and be accompanied by the check engine light on or flashing. I wouldn't try to drive it till the reason is found. Does it make any power at 2000 rpms, or just revs to that in neutral. Manual or automatic, 5.3L or6.0L ('03/04 or '05/06/). They are different!
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M
TXNSSR said:
Or is there a check engine light on?
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when I first start it, there is no light on and it works perfect, as soon as I give it gas, the check engine light and low power light comes on.

Put on second throttle body, so I don't think that is it. Any ideas?
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M
tuckerred1948 said:
Air leak near the throttle body? Internal throttle body issue, bad pedal module, engine seizing up, misfiring on several cylinders, clogged kats, could be almost anything. Most issues like these should throw codes and be accompanied by the check engine light on or flashing. I wouldn't try to drive it till the reason is found. Does it make any power at 2000 rpms, or just revs to that in neutral. Manual or automatic, 5.3L or6.0L ('03/04 or '05/06/). They are different!
Click to expand...
Do you know where I can get a pedal module? I am leaning to that as the problem. It's a manual 6.0
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tuckerred1948
Marko said:
Do you know where I can get a pedal module? I am leaning to that as the problem. It's a manual 6.0
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I can't find it tonight, but I believe @Dragon2U had one listed with some parts he is selling. From a recent thread, it is a fairly rare part to fail.
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T
Marko said:
Do you know where I can get a pedal module? I am leaning to that as the problem. It's a manual 6.0
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Can you go to a close autoparts store and borrow their code reader and check the codes?
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M
TXNSSR said:
Can you go to a close autoparts store and borrow their code reader and check the codes?
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Yes, I went and they narrowed it down but didn't know!
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T
Marko said:
Yes, I went and they narrowed it down but didn't know!
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If you can ask for the codes it would help greatly. Some of the early year throttle bodies were known to be weak, and can cause a code when the indicated and the expected position goes out of spec. I haven’t seen it happen with the later years, but it is possible.

I wouldn’t start buying parts without more data. Although not commonly suggested, this sounds like something a dealer could help with, as they can look at the code, associated data and suggest which parts need to be replaced. Or perhaps a qualified shop, as there isn’t a lot special with the engine. The entire package scares folks off, but the engine, drivetrain and suspension wasn’t uncommon back in the day.
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HUAW
I was hoping to see some answers for you Mike. Having the codes will certainly help diagnose the problem for the guys with the expertise!

Hope the two of you decide to come to Defiance tomorrow even if it is without your "R" 😉
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Prado04/03
A couple of bad spark plugs had me scratching my head a few years ago on an 83 SBC manual. Either I or my assistant accidentally damaged a plug and it didn't become evident until many months later. Out of nowhere, my Z28 was slower than a Geo Metro with a bad tranny.
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nj6969
@Marko, if you could complete your Profile, someone close to you, might give you some hands on help.
Also click on this link and go to Post #1 Help Us Help You---UPDATE

Nick & Kathy.
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Dragon2U
Marko said:
Do you know where I can get a pedal module? I am leaning to that as the problem. It's a manual 6.0
Click to expand...

I have one for sale if needed. Here is the link - Clearing out some stuff




Helpful Links
ABS, Fusebox, Speedo, etc Repair
Fanatic Pinmap
Technical Resources - Quick searchable help
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D
TXNSSR said:
If you can ask for the codes it would help greatly. Some of the early year throttle bodies were known to be weak, and can cause a code when the indicated and the expected position goes out of spec. I haven’t seen it happen with the later years, but it is possible.

I wouldn’t start buying parts without more data. Although not commonly suggested, this sounds like something a dealer could help with, as they can look at the code, associated data and suggest which parts need to be replaced. Or perhaps a qualified shop, as there isn’t a lot special with the engine. The entire package scares folks off, but the engine, drivetrain and suspension wasn’t uncommon back in the day.
Click to expand...
Do you have a mechanic? IDK your area, but if you don't you could probably ask around as to where people take their GTO's and Corvettes LS or LT. People who can figure things out and not just replace parts. I would be lost if I didn't have one. In fact, there are two shops in our town of 8,000 that are good at it.

Dave
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Mike in AZ
You could always spend $32 and get your own OBD2 scanner that connects to your phone...... and then read your own codes.

www.amazon.com

Amazon.com: Veepeak OBDCheck BLE Bluetooth OBD II Scanner Auto Diagnostic Scan Tool for iOS & Android, Bluetooth 4.0 Car Check Engine Light Code Reader : Automotive

Buy Veepeak OBDCheck BLE Bluetooth OBD II Scanner Auto Diagnostic Scan Tool for iOS & Android, Bluetooth 4.0 Car Check Engine Light Code Reader: Code Readers & Scan Tools - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
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azcactii
@Mike in AZ, which 3rd-party app would you recommend to use with this scanner?? I have a smart phone, but am a dumb user....................................
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Mike in AZ
azcactii said:
@Mike in AZ, which 3rd-party app would you recommend to use with this scanner?? I have a smart phone, but am a dumb user....................................
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I use OBD fusion….. but there are a number of good ones out there. Just go to the APP store and choose for yoruself.
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snomuncher
Reduced Engine Power could have one or more of several causes...here's a link to one article with information.


Also, from the SSR owner's manual:
See less See more
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M
Have you changed your ignition switch yet?

I also have a 6-speed and had a similar problem.

www.ssrfanatic.com

LS2 no power after startup then fine after next startup

Calling out for help for this riddle to all fanatic sleuths and my go to @Autoprof SSR - 2005 six speed 30k miles. Past problem - Cat - bank 2 code keeps getting thrown. Believe the cause is 1st owner didn't treat fuel before long storage intervals. To date cat code seems to have cleared now...
www.ssrfanatic.com www.ssrfanatic.com
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