here we go.
Thread Starter
Melting Slicks
Joined: Oct 2000
Posts: 3,010
Likes: 1
From: Sweden/Stockholm
here we go.
My car:
1991
6spd
lt4 hotcam
lpe ported 113 heads
1,6rockers
headers
Im using the stock chip.
The idle is very rough, it smells like gasoline in the garage. Is that because the car is running rich?
When I tap the gaspedal the engine reevs pretty quick, but it takes some time to it to reach idle again. Tuning issue?
I hade to adjust the idle screw on the TB in order to make the car idle. Is that because the IAC where bottend out?
As I understand it, and have been told is the car will run rich at idle, and lean at wot, and a mix of those during crusing with the stock chip. Does that sound right?
Do I dare to drive the car around town, just to "feel" it. Or can I damage the engine?
Thanks for your time...
[Modified by devilfish, 9:07 AM 5/16/2003]
[Modified by devilfish, 9:07 AM 5/16/2003]
1991
6spd
lt4 hotcam
lpe ported 113 heads
1,6rockers
headers
Im using the stock chip.
The idle is very rough, it smells like gasoline in the garage. Is that because the car is running rich?
When I tap the gaspedal the engine reevs pretty quick, but it takes some time to it to reach idle again. Tuning issue?
I hade to adjust the idle screw on the TB in order to make the car idle. Is that because the IAC where bottend out?
As I understand it, and have been told is the car will run rich at idle, and lean at wot, and a mix of those during crusing with the stock chip. Does that sound right?
Do I dare to drive the car around town, just to "feel" it. Or can I damage the engine?
Thanks for your time...
[Modified by devilfish, 9:07 AM 5/16/2003]
[Modified by devilfish, 9:07 AM 5/16/2003]
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: here we go. (devilfish)
Im using the stock chip.
1) Is that because the car is running rich?
2) When I tap the gaspedal the engine reevs pretty quick, but it takes some time to it to reach idle again. Tuning issue?
3) I hade to adjust the idle screw on the TB in order to make the car idle. Is that because the IAC where bottend out?
4) As I understand it, and have been told is the car will run rich at idle, and lean at wot, and a mix of those during crusing with the stock chip. Does that sound right?
5) Do I dare to drive the car around town, just to "feel" it. Or can I damage the engine?
1) Is that because the car is running rich?
2) When I tap the gaspedal the engine reevs pretty quick, but it takes some time to it to reach idle again. Tuning issue?
3) I hade to adjust the idle screw on the TB in order to make the car idle. Is that because the IAC where bottend out?
4) As I understand it, and have been told is the car will run rich at idle, and lean at wot, and a mix of those during crusing with the stock chip. Does that sound right?
5) Do I dare to drive the car around town, just to "feel" it. Or can I damage the engine?
2/3-When I had BLMs at 108 at idle, meaning I was really rich and the ECM couldn't take any more fuel out of the mix, I also had problems with my IAC going full open. In order to get my IAC to act normally (and stop giving me a terrible 'vacuum leak'), I had to fix the overfueling problem first. Once my rich condition got taken care of, my IAC problem vanished.
4-Sounds right. It is because the different volumetric efficiency of your engine as a whole now. The cam you have will probably require a good deal of timing adjustment to get right too...info coming from a guy I trust telling me it was needed with his setup. Overlap, reversion, etc all plays a role with idle and fuel.
5-I had quite a bit of running with things all wrong. I could blame the excess fuel for washing oil off the cylinder walls, etc and getting into my oil, thinning it out, ruining bearings, wearing down cam lobes, etc, or I could have just had some bad luck with oil pressure in general. As for me, I would never run my car for an extended period of time now with excess fuel being delivered into my combustion chamber.
Good luck, -Matt
