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Engine Specific Tech
96-04 - 2V Specific
Hesitation Issues
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<blockquote data-quote="MadStang" data-source="post: 787353" data-attributes="member: 10532"><p>so for shits and giggles I put in Lee's injectors. Slightly better idle but nothing significant. I did have one injector with the plastic nozzle boot cracked but nothing significant.</p><p></p><p>I test drove it and really played with it, when between 1700-2200RPM's, and I let off the gas, I get a severe hiccup. Verified when I got home that those rpm's is where my STFT spikes low and runs incredibly rich. </p><p></p><p>Average STFT is .97 (on both bank 1 & 2) though which is only slightly rich and the car feels great driving at every other rpm, no hesitation or problems. </p><p></p><p>My LTFT those is kinda wack though. Bank 1 is 1.15 and bank 2 is 1.05. the 1.05 is fine but WTF is the deal with Bank 1 being 10% more?</p><p></p><p>Datalog found no misfires with these injectors.</p><p></p><p>Pressure drop is high at an average of 48.6 but temperatures are in the high 80's Pressure drop spiked at 54.8 at the highest.</p><p></p><p>At idle the pressure at the rails is about 48-49.... but STFT is between .95-1.0.</p><p></p><p>Anytime throttle is increased it drops the STFT down into the .8x range....</p><p></p><p>Either I have another vacuum leak, exhaust leak (pre-o2), or my tune is screwed up...</p></blockquote><p></p>
[QUOTE="MadStang, post: 787353, member: 10532"] so for shits and giggles I put in Lee's injectors. Slightly better idle but nothing significant. I did have one injector with the plastic nozzle boot cracked but nothing significant. I test drove it and really played with it, when between 1700-2200RPM's, and I let off the gas, I get a severe hiccup. Verified when I got home that those rpm's is where my STFT spikes low and runs incredibly rich. Average STFT is .97 (on both bank 1 & 2) though which is only slightly rich and the car feels great driving at every other rpm, no hesitation or problems. My LTFT those is kinda wack though. Bank 1 is 1.15 and bank 2 is 1.05. the 1.05 is fine but WTF is the deal with Bank 1 being 10% more? Datalog found no misfires with these injectors. Pressure drop is high at an average of 48.6 but temperatures are in the high 80's Pressure drop spiked at 54.8 at the highest. At idle the pressure at the rails is about 48-49.... but STFT is between .95-1.0. Anytime throttle is increased it drops the STFT down into the .8x range.... Either I have another vacuum leak, exhaust leak (pre-o2), or my tune is screwed up... [/QUOTE]
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96-04 - 2V Specific
Hesitation Issues
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