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The Terminator
Turbo Cobras
Ignition/spark related issues. Not plugs though (I believe)
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<blockquote data-quote="tt335ci03cobra" data-source="post: 15532194" data-attributes="member: 68944"><p>Any suggestions?</p><p></p><p>Symptoms:</p><p>•all that bad spark plugs would suggest</p><p>-trouble starting. Temps are in the 20-40° range most days, 15-25° at night. I have to hold the gas pedal in half way, sometimes pump it, sometimes hold it down to bypass injectors.</p><p>-slight hesitation/rowing sensation (like on a boat) while gently accelerating.</p><p>-8.xmpg the last tank.</p><p>-cuts out on wot pulls sometimes, not every time</p><p>-sometimes the engine gets very quite as if it's almost off, and barely combustingmuch like if the plugs weren't sparking. More things as well like dying sometimes coming to a stop, aggressive bucking while coasting without throttle sometimes, a sensation of inability to accelerate or resistance to accelerate sometimes. All of this goes away for the most part if I clutch in and rev the engine a few times. Also, much like fowler plugs, if I drive around at 4-5000 rpms for a few miles on the freeway, it dramatically helps.</p><p> </p><p>This all sounds plug related. So we put fresh tr6's with a healthy .028~ gap. Car runs on 9-10psi right now. </p><p></p><p>Most all issues still persist. Ok, bypasses the boost-a-spark. Still persists. Check the coil packs, very healthy, 1 year old ford units. No reason these should be an issue.</p><p></p><p>I'm wondering if a frayed ignition wire somewhere along the harness could be causing these issues. My xcal shows battery voltage is being read at 14.3-13.6V depending on driving conditions.</p><p></p><p>Only thing I can think is frayed wire shorting out slightly. Any thoughts? I've also heard that iridium plugs aren't the best choice for boosted modular mills, but I've also seen that br7's and so forth have even more choppiness and poorer street manners. </p><p></p><p>Coolant temps never cross 185-190, iat's swing between 30-75° depending on outside time, stop and go or highway, etc, load isn't too high but touches .29-.40 depending on road grade, gear, etc. Tuning is done by the best tuner in the state so it's not a mistake in any of the tables or perimeters. Sct xcal, factory ecu. MAF's read great. </p><p></p><p>Car has does not have iirc' or mill, and the fuel system is custom without pprv if I recall correctly.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 15532194, member: 68944"] Any suggestions? Symptoms: •all that bad spark plugs would suggest -trouble starting. Temps are in the 20-40° range most days, 15-25° at night. I have to hold the gas pedal in half way, sometimes pump it, sometimes hold it down to bypass injectors. -slight hesitation/rowing sensation (like on a boat) while gently accelerating. -8.xmpg the last tank. -cuts out on wot pulls sometimes, not every time -sometimes the engine gets very quite as if it's almost off, and barely combustingmuch like if the plugs weren't sparking. More things as well like dying sometimes coming to a stop, aggressive bucking while coasting without throttle sometimes, a sensation of inability to accelerate or resistance to accelerate sometimes. All of this goes away for the most part if I clutch in and rev the engine a few times. Also, much like fowler plugs, if I drive around at 4-5000 rpms for a few miles on the freeway, it dramatically helps. This all sounds plug related. So we put fresh tr6's with a healthy .028~ gap. Car runs on 9-10psi right now. Most all issues still persist. Ok, bypasses the boost-a-spark. Still persists. Check the coil packs, very healthy, 1 year old ford units. No reason these should be an issue. I'm wondering if a frayed ignition wire somewhere along the harness could be causing these issues. My xcal shows battery voltage is being read at 14.3-13.6V depending on driving conditions. Only thing I can think is frayed wire shorting out slightly. Any thoughts? I've also heard that iridium plugs aren't the best choice for boosted modular mills, but I've also seen that br7's and so forth have even more choppiness and poorer street manners. Coolant temps never cross 185-190, iat's swing between 30-75° depending on outside time, stop and go or highway, etc, load isn't too high but touches .29-.40 depending on road grade, gear, etc. Tuning is done by the best tuner in the state so it's not a mistake in any of the tables or perimeters. Sct xcal, factory ecu. MAF's read great. Car has does not have iirc' or mill, and the fuel system is custom without pprv if I recall correctly. [/QUOTE]
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Ignition/spark related issues. Not plugs though (I believe)
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