What are the options in Programming after cam install?
Thread Starter
Staging Lane
Joined: Dec 2001
Posts: 84
Likes: 0
From: Lakeland,FL
What are the options in Programming after cam install? Here are a list of things that my 2001 Trans Am 6sd does after the cam install that the car did not do before. (B1 cam from MTI)
1.When you first start the car in the morning the cam will shake the car really bad for 5-10 seconds until the idle smooths out.
2.Any time you warm start the car the rpm's surge from 800 down to where the car will almost die and sometimes does and then back up to 800 a couple of times before it find idle.
3.I've noticed that the car will jerk or buck a lot if you are driving at a low rpm. (1500 or less)
Will computer programming (ED WRIGHT) be able to take care of these problems?
1.When you first start the car in the morning the cam will shake the car really bad for 5-10 seconds until the idle smooths out.
2.Any time you warm start the car the rpm's surge from 800 down to where the car will almost die and sometimes does and then back up to 800 a couple of times before it find idle.
3.I've noticed that the car will jerk or buck a lot if you are driving at a low rpm. (1500 or less)
Will computer programming (ED WRIGHT) be able to take care of these problems?
Re: What are the options in Programming after cam install? I'm interested in this too. I assume that you have to remove the throttle body in order to drill the plate. Do you have to replace the gasket each time? What happens if you drill the hole too large in diameter?
Thanks,
John
Thanks,
John
TECH Junkie
Joined: Nov 2001
Posts: 3,604
Likes: 0
From: Los Angeles
Re: What are the options in Programming after cam install? [quote]Originally posted by JohnR:
<strong>I'm interested in this too. I assume that you have to remove the throttle body in order to drill the plate. Do you have to replace the gasket each time? What happens if you drill the hole too large in diameter?
Thanks,
John</strong><hr></blockquote>
The gasket is rubber pressed into the intake manifold. It doesnt need to be replaced unless you somehow manage to damage it, which would take a lot of effort.
If you drill too big of a hole, and the IAC motor can't get the idle down to what the PCM wants, it'll probably set a code and you'll idle at 900-1000 rpms. Slowly step up the hole size...I think eventually I got up to 1/4" and thats as big as I'd ever go. Works fine for my setup, but for smaller cam's or stock heads chances are a smaller hole will be needed.
When I had my 218/224 on a 114 cam, no hole enlargement was nessisary.
<strong>I'm interested in this too. I assume that you have to remove the throttle body in order to drill the plate. Do you have to replace the gasket each time? What happens if you drill the hole too large in diameter?
Thanks,
John</strong><hr></blockquote>
The gasket is rubber pressed into the intake manifold. It doesnt need to be replaced unless you somehow manage to damage it, which would take a lot of effort.
If you drill too big of a hole, and the IAC motor can't get the idle down to what the PCM wants, it'll probably set a code and you'll idle at 900-1000 rpms. Slowly step up the hole size...I think eventually I got up to 1/4" and thats as big as I'd ever go. Works fine for my setup, but for smaller cam's or stock heads chances are a smaller hole will be needed.
When I had my 218/224 on a 114 cam, no hole enlargement was nessisary.
Re: What are the options in Programming after cam install? 1) he could raise cold idle and adjust the fuel table to minimize that.
2) He can raise the idle to 900 and fix the fuel tables to eliminate that. Some of the problem may go away as the computer learns. I know the weather has only recently become really cold around our way.
3) He can adjust the fuel tables to help a bit, but some cam surge is going to be present at very low rpms even with tuning.
2) He can raise the idle to 900 and fix the fuel tables to eliminate that. Some of the problem may go away as the computer learns. I know the weather has only recently become really cold around our way.
3) He can adjust the fuel tables to help a bit, but some cam surge is going to be present at very low rpms even with tuning.
Thread Starter
Staging Lane
Joined: Dec 2001
Posts: 84
Likes: 0
From: Lakeland,FL
Re: What are the options in Programming after cam install? Thanks for the help Ragtop99. LS1powerN20 it looks like JMX covered all of your questions.
I've drilled the TB hole out to two sizes under the 1/4. My IAC counts are in the 30 range.
I think I'll wait till I get headers before I talk to ED!
I've drilled the TB hole out to two sizes under the 1/4. My IAC counts are in the 30 range.
I think I'll wait till I get headers before I talk to ED!
