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Persistent cammed 01 cobra stalling issue
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<blockquote data-quote="BrokeMedStudent" data-source="post: 16865515" data-attributes="member: 199155"><p>Hey everyone,</p><p></p><p>I have a 2001 cobra 35k miles with some persistent idle problems. Previously, I had a full exhaust put in with NA cams, JLT intake, and accufab dual blade throttle body. It was tuned to 353 RWHP and everything was great...except now the car stalls at nearly every stop. What happens is, as I put the car in neutral and come to a complete stop the idle will typically drop a few hundred RPM and either die or rev back up to normal idle. The tuner said there is nothing they can do on their end and there must be a non-tune issue that needs to be resolved. They said the accufab throttle bodies can cause idle issues but I'm not convinced; the throttle isn't sticking and once the car does successfully hold idle it is dead set and smooth at 900 RPM. In addition, if I blip the throttle when in neutral the revs drop and the car dies every time. Here is what I've tried so far:</p><p>-Cleaned MAF, idle air controller, EGR (everything looked clean to start with)</p><p>-Replaced IAC with OEM unit (nothing changed)</p><p>-Cleaned intake filter</p><p>-Checked for vacuum leaks (there are none)</p><p>-Checked the air gap on the closed throttle body (looks perfect)</p><p>-Checked the throttle cable</p><p></p><p>Previously, before I had the cams installed, I had a shop replace some O2 sensors due to a code that has never come back. I'm not sure if the sensors were OEM or aftermarket and if that would make a difference. </p><p></p><p>Another bit of information: recently after I had a shop look into the idle tune (which they adjusted but the car still stalls) I got the car back and noticed that at high RPM at full throttle I'm losing power. I'm 99% sure it's not wheel spin and I don't think the clutch is slipping. Could the cool dense Arizona air be causing my MAF to max out? Is that even relevant?</p><p></p><p>At this point, I'm at a loss and was hoping someone with more experience could share their thoughts. Is it the tune, is it the O2 sensors, MAF, or something I'm just not thinking of?</p><p></p><p>Thank you!</p></blockquote><p></p>
[QUOTE="BrokeMedStudent, post: 16865515, member: 199155"] Hey everyone, I have a 2001 cobra 35k miles with some persistent idle problems. Previously, I had a full exhaust put in with NA cams, JLT intake, and accufab dual blade throttle body. It was tuned to 353 RWHP and everything was great...except now the car stalls at nearly every stop. What happens is, as I put the car in neutral and come to a complete stop the idle will typically drop a few hundred RPM and either die or rev back up to normal idle. The tuner said there is nothing they can do on their end and there must be a non-tune issue that needs to be resolved. They said the accufab throttle bodies can cause idle issues but I'm not convinced; the throttle isn't sticking and once the car does successfully hold idle it is dead set and smooth at 900 RPM. In addition, if I blip the throttle when in neutral the revs drop and the car dies every time. Here is what I've tried so far: -Cleaned MAF, idle air controller, EGR (everything looked clean to start with) -Replaced IAC with OEM unit (nothing changed) -Cleaned intake filter -Checked for vacuum leaks (there are none) -Checked the air gap on the closed throttle body (looks perfect) -Checked the throttle cable Previously, before I had the cams installed, I had a shop replace some O2 sensors due to a code that has never come back. I'm not sure if the sensors were OEM or aftermarket and if that would make a difference. Another bit of information: recently after I had a shop look into the idle tune (which they adjusted but the car still stalls) I got the car back and noticed that at high RPM at full throttle I'm losing power. I'm 99% sure it's not wheel spin and I don't think the clutch is slipping. Could the cool dense Arizona air be causing my MAF to max out? Is that even relevant? At this point, I'm at a loss and was hoping someone with more experience could share their thoughts. Is it the tune, is it the O2 sensors, MAF, or something I'm just not thinking of? Thank you! [/QUOTE]
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Persistent cammed 01 cobra stalling issue
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