Ok, (no i'm not going away that easily, lol) got new tunes from Doug. Loaded up the new 91 race tune. Still clunks. While I've had a few people now suggest Spark Knock, it is nothing like they have explained. It is by no means loud, it is not metal sounding at all, and doesn't happen anywhere but in the 1000-3000 range and as i've said only under heavy throttle. I got a can of seafoam that I'm going to run through her. Quick question, someone once told me not to run seafoam in a car until it's got at least 70-80000 miles on it as it can remove a certain film/layer off of the injectors that newer vehicles have. Is this correct, or a bunch of bologna? If it is safe to use it in a full tank of gas with 50000 miles on the clock, than i will do so and see what happens. I have a horrible feeling its not going to help though
does what your experiencing almost feel like a auto shift but softer?
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2007 Mustang GT Auto: Tillman 93 Dyno Tune, JLT CAI, Delete Plates, Borla Mid X Pipe, Borla Aggressive Axel Back, Roush Front Tower Bar, Clear Turns Signals w/ AW3157 LED Bulbs. (3.73 gears just need time to put them in)
Ok, (no i'm not going away that easily, lol) got new tunes from Doug. Loaded up the new 91 race tune. Still clunks. While I've had a few people now suggest Spark Knock, it is nothing like they have explained. It is by no means loud, it is not metal sounding at all, and doesn't happen anywhere but in the 1000-3000 range and as i've said only under heavy throttle. I got a can of seafoam that I'm going to run through her. Quick question, someone once told me not to run seafoam in a car until it's got at least 70-80000 miles on it as it can remove a certain film/layer off of the injectors that newer vehicles have. Is this correct, or a bunch of bologna? If it is safe to use it in a full tank of gas with 50000 miles on the clock, than i will do so and see what happens. I have a horrible feeling its not going to help though
You can run the Seafoam. You need to go back and recheck you install. Check all vac lines, harnesses, and fasteners. It's probably something very simple.
does what your experiencing almost feel like a auto shift but softer?
Not at all. If I was deaf, the car would be a dream! I mean she pulls just fine throughout the entire band, idles great, NOTHING is wrong except under heavy throttle at about 1100-3000.
You can run the Seafoam. You need to go back and recheck you install. Check all vac lines, harnesses, and fasteners. It's probably something very simple.
That is really the only thing left i can do i think. After I run the seafoam for about a quarter of a tank or so, if it still hasn't stopped, i'll just backtrack and make sure i did everything right. I must say i could have cleaned the intake a little better but it seemed to be a tight fit. Just out of curiosity what could i have possibly done wrong during the install? Short of damaging the injectors or stripping bolts I can't imagine what I could have screwed up on. Eh well... I'll keep you posted.
Just a suggestion, but is it possible that you could get your car on a dyno. This would cost a few bucks but it would be the most definitive way to tell what is going on and possibly save your engine in the process.
Just a suggestion, but is it possible that you could get your car on a dyno. This would cost a few bucks but it would be the most definitive way to tell what is going on and possibly save your engine in the process.
I think that is a great idea. After the seafoam has ran through and I've double checked the install... i'll be taking a 45 minute drive to Neosho, MO to get her on the dyno and see if we can't tune and diagnose the problem.
Not at all. If I was deaf, the car would be a dream! I mean she pulls just fine throughout the entire band, idles great, NOTHING is wrong except under heavy throttle at about 1100-3000.
Is it performing adversly in any way? I thought the main concern was the chatter and I'm not sure what a dyno could do for that.
Is it performing adversly in any way? I thought the main concern was the chatter and I'm not sure what a dyno could do for that.
Not really............ I must say just to be fair that with the tune getting going from a standing start is different but not bad in any way. I could just be imagining things. I just mean cruising along, shifting (stick) at about 25-2750 rpm is smooth and consistent. And I only think that going to a dyno is a good idea because i do NOT want to go to the dealership to figure out what the noise is and i'm curious if there is a bigger issue that is causing the hard to hear sound and maybe the dyno could diagnose the problem rather than identify the sound... if that makes sense
Without actually hearing it, id also have to say it sounds like pre detonation. Its more prone to happen at slower engine speeds than higher, and you say it goes away past 3000 RPM.
Yup, goes away after 3 or so thousand. I guess I'll give everyone a quick update while I'm here. Switched to better Gas (I've used since I bought the car with no problems) using 91 octane along with the 91 octane race tune (updated one). Still experiencing same noise. Also finished running the Seafoam through her. I've checked my install (not in great great detail) but everything seems kosher. All vacuum lines, CMRC is unplugged, CAI seems air tight and MAF sensor and all is hooked up as it should be. I really can't put a finger on it. I once again feel its worth saying that the noise is NOT metallic at all. It is not grindy, or pingy... it's honestly like someone is taking two pieces of wood, and banging them together quickly. I'm considering removing the CMRC plates and loading an updated tune and seeing what happens. For all I know it could even be noise from the CAI and I'm just being paranoid. My only options remaining are:
Get on a dyno and see if theres any deeper issues at hand.
Step backwards on install and figure out if it's definitely the CMRC plates or if its the CAI.
Oh, and I also plan on borrowing a camera, and seeing if I can't get it to pick up the noise. If i can than i'll upload it to youtube and see if anyone can diagnose it based on the noise.
