Vacuum leak or tuning issues

[ducq]

First, Ted janetty told me he is very confident he can fix my tune through an email tune as long as I have no vacuum leaks or exhaust leaks. What I want to find out before I blow more money trying to get my tune fixed, how would I find out if I have a vacuum leak? Please read and tell me if this issue is caused by vacuum leak or is my tuner just not getting it right.

So I had a cam installed (see signature) and after goin to my tuner numerous times, he can't get it right. When driven for a few minutes holding the rpm's around 1800, when put into neutral, the rpm's will drop to 700ish and rev to 2k and back down to 700 a couple times until it catches idle at 900. It does this especially when exiting the highway. Also on cold starts, the first minute of driving will sometimes do this. it's not really consistent. After a hard acceleration and letting it into neutral, it for sure will rev up to 2k couple times.

My tuner said there must be something wrong with my thorley body , Tracy (sc150) assures me it's not. I took off my oil cap breather and plugged the tube back hoping to fix this. Now I'm considering bypassing the cat can too and see of that helps. Is there a chance it could be the catch can? My cam installer told me the inlet side of catch can, (valley cover fitting)tube was disconnected when he started on my car. I doubt it was but if it was, this have damaged the car?

[Crime2]

Popcorn


Sent from my iPhone using Tapatalk. If is spelllled wrong deal with it.

[The Stig]

Originally Posted by ducq

First, Ted janetty told me he is very confident he can fix my tune through an email tune as long as I have no vacuum leaks or exhaust leaks. What I want to find out before I blow more money trying to get my tune fixed, how would I find out if I have a vacuum leak? Please read and tell me if this issue is caused by vacuum leak or is my tuner just not getting it right.

So I had a cam installed (see signature) and after goin to my tuner numerous times, he can't get it right. When driven for a few minutes holding the rpm's around 1800, when put into neutral, the rpm's will drop to 700ish and rev to 2k and back down to 700 a couple times until it catches idle at 900. It does this especially when exiting the highway. Also on cold starts, the first minute of driving will sometimes do this. it's not really consistent. After a hard acceleration and letting it into neutral, it for sure will rev up to 2k couple times.

My tuner said there must be something wrong with my thorley body , Tracy (sc150) assures me it's not. I took off my oil cap breather and plugged the tube back hoping to fix this. Now I'm considering bypassing the cat can too and see of that helps. Is there a chance it could be the catch can? My cam installer told me the inlet side of catch can, (valley cover fitting)tube was disconnected when he started on my car. I doubt it was but if it was, this have damaged the car?

easiest way to tell if you have a vacuum leak is to data log.

[bluetorp]

Sounds like tuning to me. Hunting for idle when coasting in neutral or after cold starts is a "classic" symptom of an untuned (or badly tuned) cam install. My guess is that your running airflow and/or throttle follower tables are jacked.

[JANNETTYRACING]

Originally Posted by ducq

First, Ted janetty told me he is very confident he can fix my tune through an email tune as long as I have no vacuum leaks or exhaust leaks. What I want to find out before I blow more money trying to get my tune fixed, how would I find out if I have a vacuum leak? Please read and tell me if this issue is caused by vacuum leak or is my tuner just not getting it right.

So I had a cam installed (see signature) and after goin to my tuner numerous times, he can't get it right. When driven for a few minutes holding the rpm's around 1800, when put into neutral, the rpm's will drop to 700ish and rev to 2k and back down to 700 a couple times until it catches idle at 900. It does this especially when exiting the highway. Also on cold starts, the first minute of driving will sometimes do this. it's not really consistent. After a hard acceleration and letting it into neutral, it for sure will rev up to 2k couple times.

My tuner said there must be something wrong with my thorley body , Tracy (sc150) assures me it's not. I took off my oil cap breather and plugged the tube back hoping to fix this. Now I'm considering bypassing the cat can too and see of that helps. Is there a chance it could be the catch can? My cam installer told me the inlet side of catch can, (valley cover fitting)tube was disconnected when he started on my car. I doubt it was but if it was, this have damaged the car?

I always say that so that you will be aware and make sure you don't have any vacuum leaks.

A smoke test can Determine if there are not leaks.

Also once I send you a Tune and You Log I will be able to tell if you do or not.

I just Diagnosed a Vacuum leak on a Whipple Cam Car this way, he didn't know he had a leak, after I told him I suspect a Vacuum Leak he Diligently searched and found 2 leaks, repaired them and Logged and all is Perfect Now.

I Definitely Can Write you a Tune that will Run and Drive Perfectly, but you must also Understand I can not Tune Out any Mechanical Problems, if any.

Ted.