hank Posted October 13, 2004 Report Share Posted October 13, 2004 i was driving lastnight around 75mph and punched it, was racing an old honda. this guy must have sprayed on me. we took off and stayed side by side. i looked at the tach and it was around 5000 rpm. we were easily above 120, funny thing was, the speedo only said 89. as i slowed down to about 2300 rpm, usually about 70 mph, the speedo said i was going 28 mph. so i watched all my gauges and continued to drive home. all the trucks performance was normal but the speedo was wrong. it didn't get stuck in one place, it was steel moving just telling me a slower speed. when i finally slowed down to around 25 mph it dropped to 0 mph. i made a complete stop and took off again, now the speedo is working fine. i took it back upto 105 to test. all good. any ideas? Link to comment Share on other sites More sharing options...
DaGeorge Posted October 13, 2004 Report Share Posted October 13, 2004 I don't know what to tell you on that one man Sounds like a good excuse for when you get pulled over though "But officer....... I couldn't have been doing 120+, my speedo only said 70" Link to comment Share on other sites More sharing options...
TurbochargedBerserker Posted October 13, 2004 Report Share Posted October 13, 2004 I had this happen with a couple of gauges but not the speedo -- for me it was temp, oil press and fuel I think. All went to zero, but when I restarted, all was well. Hasn't happened again. Link to comment Share on other sites More sharing options...
WisconsinSS Posted October 13, 2004 Report Share Posted October 13, 2004 I had that happen to me. I took it in and they told me they needed to flash new software into the dash. All was fine for a week or so and then the entire dash quit working. The dealer replaced it under warentee. Good luck. Link to comment Share on other sites More sharing options...
marc_w Posted October 13, 2004 Report Share Posted October 13, 2004 I don't know how plausible this is... but... Is there a peg on the speedo to stop you from "burying" the needle? I don't recall right now. The needles are someone lightly pushed onto a small metal pin. The pin is what rotates and drives the needle across the face of the gauge. I wonder if the needle slipped on that pin when/if the speedo was buried, throwing off the speed. When you went down to 0, it reset it to the "correct" location on the pin. Link to comment Share on other sites More sharing options...
DaGeorge Posted October 13, 2004 Report Share Posted October 13, 2004 I don't know how plausible this is... but... Is there a peg on the speedo to stop you from "burying" the needle? I don't recall right now. The needles are someone lightly pushed onto a small metal pin. The pin is what rotates and drives the needle across the face of the gauge. I wonder if the needle slipped on that pin when/if the speedo was buried, throwing off the speed. When you went down to 0, it reset it to the "correct" location on the pin. <{POST_SNAPBACK}> Very good in theroy A++ But from reading his first post he didn't even get to 120. Link to comment Share on other sites More sharing options...
marc_w Posted October 13, 2004 Report Share Posted October 13, 2004 Oh yeah. Dang. I may have an imagination, but no reading comprehension. Link to comment Share on other sites More sharing options...
DaGeorge Posted October 13, 2004 Report Share Posted October 13, 2004 I hear ya on that one Hank, can you reproduce the same thing? You could hook up a live scan tool and check what the VSS is saying. Might help figure out if its mechanical or electrical. Link to comment Share on other sites More sharing options...
hank Posted October 13, 2004 Author Report Share Posted October 13, 2004 everything is working fine since i came to a complete stop. i had to be doing at least 120... started at about 75 and floored it for about 10 seconds or so. i was going way over 89. like i said, all the power was there, just not the speedo. i talked to the dealer earlier, he said if it happens again to bring it in to see what he can do. he also knows about my pcm swaps and ALL other mods. since the speedo is electronically controlled. Link to comment Share on other sites More sharing options...
hank Posted October 13, 2004 Author Report Share Posted October 13, 2004 I hear ya on that one Hank, can you reproduce the same thing? You could hook up a live scan tool and check what the VSS is saying. Might help figure out if its mechanical or electrical. <{POST_SNAPBACK}> i tried doing it again. pegged it for about three seconds and let off. everything is working fine so far. i just can't figure out why it happened the first time. Link to comment Share on other sites More sharing options...
Krambo Posted October 13, 2004 Report Share Posted October 13, 2004 This exact issue happened to my brother. He has an 03 silverado ECSB with the 4.8L. It is currently in to be fixed however as soon as I hear something I will post it. Link to comment Share on other sites More sharing options...
Ca. C3 Posted October 14, 2004 Report Share Posted October 14, 2004 This exact issue happened to my brother. He has an 03 silverado ECSB with the 4.8L. It is currently in to be fixed however as soon as I hear something I will post it. <{POST_SNAPBACK}> Did you beat the POS hondog ? Larry/c three Link to comment Share on other sites More sharing options...
Xero Posted October 14, 2004 Report Share Posted October 14, 2004 ok so i bough some white face overlay and i installed it tonight. i took off the needles and reinstalled em, setting them to the correct position when the key is in the on position. however when i start the car everything go haywire!!!! i had it all calibrated correctly but when i started the truck for the first time it was ok. i turned it off completely and turned it back on, now i am at 9 volts on the voltameter and like -1/4 tank of gas. WTF! how do i fix this!!!!!!!!! i cant drive it like that. Link to comment Share on other sites More sharing options...
radford175 Posted October 14, 2004 Report Share Posted October 14, 2004 take it into the dealer they will take care of it Link to comment Share on other sites More sharing options...
Xero Posted October 14, 2004 Report Share Posted October 14, 2004 but i changed the overlay to white, dosent that void the warrenty??? Link to comment Share on other sites More sharing options...
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