timing at idle question

[89T]

sooo, somebody out there possibly want to take a timing light out to their beloved 3rd gen and get me a couple of readings?
i need a reading at idle, 1000 and 1500 rpms.
preferably a bone stock car.

or anybody with a obd1 swap want to post their timing map on a screen shot? I'll post mine if you post your's..lol

The reason for this thread is that i am trying to figure out a issue with atomized fuel coming out of the exhaust at idle.

[2ndGenGuy]

Doesn't the flywheel only have a few marks on it? How do you read how many degrees of advance you have when it goes past those marks? Is there a special timing gun for that?

[Rendon LX-i]

i agreed you should be at 5 plus bone stock ...shit i forgot. but im close. Ill get back to you on that bro

[Nafs Asdf]

Doesn't the flywheel only have a few marks on it? How do you read how many degrees of advance you have when it goes past those marks? Is there a special timing gun for that?

Yup, I got one of those. It's got a dial on it so you can adjust the light between 0-60° advanced I think.

[89T]

shoot i forgot all about it. You would need a timing gun with the dial on the back.
you would turn the dial till the tdc mark is on the pointer.

thanks for the reply's guys keep 'em coming.

what i am trying to figure out is why my car wont idle unless it's pig rich. I can adjust the fuel trim and lean out the idle section by 1% but it will gradually lean out and die.

[89T]

ttt

[89T]

any help out ther guy's?

[Oldblueaccord]

Timing at idle should be rock steady, I dont really see how it could make it run rich/lean unless it is way way out of spec. This is just what I think with out knowing your set up.

Whats your wideband eading at idle?

Are your injectors double firing maybe at idle.

wp

[89T]

i have the injectors set to fire once per two rev's, so i dont think thats the problem.
here is the spark map.
lower left will be idle.

[Oldblueaccord]

Not sure ...shows your 15 degrees BTDC up to 1500 rpm that sounds about right. Change it to 10 if you think it will make a differance.

Stock size injectors? Fuel pressure low (lower) at idle. Maybe to injectors are not firing correctly and real low settings.


wp

[89T]

Not sure ...shows your 15 degrees BTDC up to 1500 rpm that sounds about right. Change it to 10 if you think it will make a differance.

Stock size injectors? Fuel pressure low (lower) at idle. Maybe to injectors are not firing correctly and real low settings.


wp

I'll try changing it to ten tomarrow after work.
i am running RC 850's and fuel pressure is set to 41 psi .

[Oldblueaccord]

I wonder if you could call RC and see if they will run down low enough. With a 2 liter motor they may not be accurate firing wise at low pulse levels. Dunno what else to tell you really.

EDIT:

http://forums.haltech.com/viewtopic.php?f=16&t=1652

Seems possible just need the right way to control them.


wp

[89T]

hmmm. food for thought .
thanks for the help. I was wondering if i needed to bump the fuel pressure up because of a suspected weak spray pattern. Who knows if it will help.

I will do some research, and i have a line on an auto tune feature for the Holley commander.
the coolant temp modifier may be off as well.

[Oldblueaccord]

any luck chuck?


wp

[89T]

I have been busy with my truck so i have not had the chance to mess with it.