stumble at high rpm and mph
08-26-2002, 09:00 PM
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stumble at high rpm and mph Withing the last week, my car has been breaking up or stumbling only at high RPM (~5100-5300?). It seems to happen more often at 4th gear. It seems intermittent, but I rarely get to rev 4th gear.
I had it dyno'ed on sunday, and it made very smooth power and did not stumble or miss. I was very worried, but he dyno sheet was remarkable because it was very linear, no spikes/etc, as most others there did (Platinum vs copper plugs?), just perfect. It made 350.5/363 A/F 13.4 with bolt ons and spaghetti style headers.
I have never misshifted into the wrong gear (3-2, 4-3). It runs fine, no noise, etc at all other times.
I recently installed a fuel filter. About 3 weeks ago I installed an ASP pulley, ataped, and got zero knock retard.
The car has 29k on it. Driven hard. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Please help. <img border="0" alt="[Firebird]" title="" src="graemlins/formula.gif" />
<small>[ August 26, 2002, 09:05 PM: Message edited by: Greg Fell ]</small>
I had it dyno'ed on sunday, and it made very smooth power and did not stumble or miss. I was very worried, but he dyno sheet was remarkable because it was very linear, no spikes/etc, as most others there did (Platinum vs copper plugs?), just perfect. It made 350.5/363 A/F 13.4 with bolt ons and spaghetti style headers.
I have never misshifted into the wrong gear (3-2, 4-3). It runs fine, no noise, etc at all other times.
I recently installed a fuel filter. About 3 weeks ago I installed an ASP pulley, ataped, and got zero knock retard.
The car has 29k on it. Driven hard. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Please help. <img border="0" alt="[Firebird]" title="" src="graemlins/formula.gif" />
<small>[ August 26, 2002, 09:05 PM: Message edited by: Greg Fell ]</small>
