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Thread: hesitation at high speed
04-11-2009, 05:43 PM #1
hesitation at high speed
my 07 burban has a hesitation problem it does it at 90 mph through 100 mph the dealer is no help.they can't road test at that speed.any ideas?no engine light or codes.runs good other wise
04-11-2009, 05:54 PM #2
Seems a little strange to only have that hesitation at those speeds. But could be a lot of things. Plugs, wires, bad gas, etc. How many miles do you have on it? Is it tuned? Any mods? When was the last time you did scheduled maintenance? Do you have access to a handheld scanner? Then you could see what's happening at that speeds, misfires on which cylinder for example.
2009 GMC Sierra Denali AWD
04-11-2009, 05:58 PM #3
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04-11-2009, 06:18 PM #407 SILVERADO Ls
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04-11-2009, 06:25 PM #5
They shouldn't have a hesitation though. They either won't accelerate or just cut fuel once they hit the limiter, which is also normally about 98 or so.
Assuming everything is OK, truck is stock, etc... maybe also see if there is a PCM update for your truck? Wouldn't be unusual for an early '07 to have a few bugs in the puter.
04-11-2009, 07:47 PM #6
only has 22000 miles no mods.tried gastreatment and octane boost.also tried premium fuel.no difference.i don't drive at that speed to often only when out of state.(no points)
04-12-2009, 03:04 PM #7
have appointment on tuesday i'll see if they an reset PCM shouldn't hurt.07 burban black on black
04-12-2009, 04:08 PM #8
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Good ol' speed limiter. Mine is set at 200MPH on my Silverado LOLDarcy
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04-12-2009, 10:20 PM #9
PhilHappy 2 Wheeler!
04-14-2009, 05:56 PM #10
took truck to dealer.i asked to receck again.they claim everythin is to spec.guess i'll have to take it to a real mechanic.
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