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Thread: LS1 Hesitation?
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09-25-2010, 05:46 PM #1
LS1 Hesitation?
I have a 98 TA and i have noticed a hesitation under acceleration. I changed the fuel filter, the plugs, wires, air filter, cleaned MAF sensor and cleaned throttle body. i wouldnt think it was a fuel pump, i dont here a whine or anything. what about the PCV valve. would this cause a short hesitation under throttle. I also feel a small shake at an idle, whether this is connected idk PLEASE HELP!!!!!!!!
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09-25-2010, 08:58 PM #2
more dedails. does it do it at a certain speed/rpm? check your fuel pressure it should be 58psi at idle.
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09-26-2010, 04:30 AM #3
- Join Date
- Apr 2008
- Location
- Madison, WI
- Posts
- 7,006
1999 Formula WS6 M6-sold- 2001 Silverado Z71
any modifications to the car?
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09-26-2010, 05:26 PM #4
It seems to do it after it shifts up to another gear. Im not at WOT when it happens, just like stop and go traffic i can feel it as if im letting off the throttle but really not. How exactly do u check fuel psi? havent ever had to do it nor seen anyone do it. As for mods, just an SLP lid and custom 3" exhaust. Thats about it.
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09-26-2010, 05:35 PM #5
Has your SES light tripped? If so, have you scanned the codes?
Was the problem exactly the same before the work that you did?
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09-26-2010, 07:20 PM #6
sounds like you might have the same problem as me. when im going 50-60mph i get hesitation not going wot. if i go wot it doesnt hesitate at all.
im thinking my problem is either going to be fuel pump or probably more than likely tune/fuel tables or something.
this is how to check for fuel pressure.
[ame]http://www.youtube.com/watch?v=tJF5Lli4xq8[/ame]
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09-27-2010, 03:09 AM #7
Is the PCV hose cracked at the throttle body? That is about the number one spot for a vacuum leak to form.
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09-27-2010, 08:02 AM #8
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