Subject	NA strange hesitation when warm with throttle
Posted by	TriniTT on August 30, 2012 at 5:20 PM
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Message	I've posted several times about this issue, but I've narrowed it down to a predictable pattern and I think others may be able to offer insight. My 96 na has had very many things replaced and is throwing no codes. It runs fine when cool, and mostly fine when warm. But, if I park the car and come back to it when it's still warm, the throttle becomes boggy; the heavier my foot is on the throttle, the more it wants to bog down. If I slowly ease into the throttle, the car doesn't seem to have a problem moving, although a slight hesitation might occur especially right after engaging the clutch in any gear. The hesitation typically comes right at 3k rpms, so I've replaced all fuel-related items (pump, fpc, filter, maf, ptu, cas, etc), although I have not replaced the injectors. I ohm tested them and they are all in spec. At first I thought it was a coolant-related issue, but my temp doesn't surge when the car starts to change its attitude. My coolant level is full and I don't have any leaks. Now my question is this: could an injector be going bad and not providing the efficient amount of fuel under certain load conditions? I.e. when I step on the throttle harder, is the cylinder filling up with too much fuel and I'm having to burn it off as I'm lightening my foot on the throttle? That's precisely how it feels. Any constructive thoughts or suggestions are appreciated. Cheers, JBrobst "A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing." George Bernard Shaw
Follow Ups	NA strange hesitation when warm with throttle - TriniTT 17:20:21 08/30/12 Re: NA strange hesitation when warm with throttle - Cjw3 20:29:40 08/30/12 There's no knock, I have a sensor relocation kit. - TriniTT 20:32:01 08/30/12 How are your plugs? (n/m) - JonnyZ(SoCal) 00:07:51 08/31/12 New, they look like they're burning fine. (n/m) - TriniTT 09:37:31 08/31/12 Have you checked the O2 sensors? (n/m) - Joe@ZSpeedperformance 20:58:32 09/01/12 Yes they have been replaced with OEM. (n/m) - TriniTT 11:39:39 09/02/12 Re: NA strange hesitation when warm with throttle - Medallion Man 02:39:15 09/02/12 This is precisely what Bernie inquired. I need to check it - TriniTT 11:40:51 09/02/12 Vapor lock. Poor ventilation on '96 purge canister solenoid? (n/m) - craigz96tt 10:45:12 09/02/12 That shouldn't matter, it shouldn't be different than - TriniTT 11:44:06 09/02/12
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