Max-Effort users with 72 lb. or 83 lb. injectors...leaning idle out

[Steve Y]

Chris is running default idle.

Chris, didn't I send the instructions which contain setting pos 0 idle fuel?

If not let me know, I will email them to you.

 

[Chris McDade]

Steve,
Are you tired of talking to me yet? Please don't be mad. Im trying to learn darn thing

Please email me the directions.
cmcdade@dbup.textron.com

Thanks

 

[Steve Y]

LOL

I can't find the email where I sent you the instructions.

Take the idle fuel down till it gives a rough idle and go back up a few numbers till it idles good.

Pos 0, air on, key on, in drive.

Make sure it is hot Chris when you set this, and let me know how you make out.

 

[Eric Stage I]

You guys may also want to consider something to raise your voltage a little. That will help get those big injectors opening faster and more consistently. I put on an Impala alternator, and my idle volts went up to about 13.8-14.0.

On the cam sensor, I always go counterclockwise till the car wont start anymore, then back clockwise a little. I don't know whether its right or wrong, but it always works

My faster car has 84# Delphi's on it and idle can be hairy, especially when you're trying to command only about 1.3ms pulsewidth at idle. The things are just dribbling fuel. But it will usually idle at 900rpm ok. This is the price we pay for using these big injectors. Maybe the guys with smaller injectors and a seventh are the smart ones.

Regards,
Eric

 

[Intercooler]

Are you setting the crank at 25º when you drop the cam sensor in? I tried moving it back and forth like that but didn't change much. I had 65's before but never tried them. I think with the stuff I have they would have ran out. I doubt the 72's would be a whole bunch leaner but who knows.

 

[Eric Stage I]

Yeah, I set it the factory way first, then I do the back and forth thing.

 

[Chris McDade]

Do any of you guys ever unplug or kill the cam sensor before a run? Doesn't this change the way the injectors fire? I knew some people in the past that use to do this , but I really wasn't sure why.

 

[PRSRIZD_V6]

Originally posted by Steve Y


I am thinking about quitting Then I won't have any money and will have to move me and the Russian (along with her friend so she can have someone to talk to) down to TX and move in with Steve W. He has supported everybody through the years so now he can support us and I will do odd jobs around the farm as long as it doesn't require much thought. My thoughts will consist of birds and toads and that rabbit that just ran behind the barn....wondering if I can get him with my slingshot.

It will be a simple life. No more 02 sensors. No more headgaskets.
No more arguing with Russ Merritt.

LOL

If you move to Tx and work odd jobs for Steve Wood who's going to do your odd jobs?

 

[Steve Wood]

I am going to do his odd jobs...I have a nice shop and the concrete is nice and cool in there.....I will send the rabbits and toads in there for him.

BTW, on the ME-R with the 75s, I decided it works best at 16 today. O2s are about 720 at operating temperature idling and rise to 820 after I drive it and come back to idle.

So much for relying on o2 numbers.

 

[Steve Wood]

Originally posted by Chris McDade
Do any of you guys ever unplug or kill the cam sensor before a run? Doesn't this change the way the injectors fire? I knew some people in the past that use to do this , but I really wasn't sure why.

In the old days with small injectors, we thought we might get a bit more fuel when the cam sensor was unplugged and the car went into batch mode. I don't know if it really delivered anymore, or not. LC did it back in the 80s.

 

[Two Lane]

Jesse,

As you know, you could even have a bad injector.

Did you get them new from Jack at Racetronix?

I'm sure he'd be glad to help by testing them, if you did find a suspect injector.
______________________________________________

Have heard of some probs with discounted brand name injectors being sold on the Net actually being factory discards, so be careful there.
______________________________________________

Any chance of trying/borrowing a current edition Translator or T+?
______________________________________________

The earlier post about insuring adequate voltage at idle could also be right on the money.


Keep after it...this is curable!

 

[Intercooler]

I get 14.2v at idle so that seems pretty decent. The injectors were part of the package deal I got with the ECM and Max-Effort so I don't really know where they come from other than they never had fuel through them. I plan on popping them out this weekend and installing my 30 lb. injectors to do a little testing. Hopefully it will point the finger at the culprit.

 

[Two Lane]

Thought of one more thing...

Make sure you've got a good injector wiring harness, also.

John Spina at www.Casperselectronics.com has an upgraded
injector harness (specifically for the larger injectors) to help deliver increased and stable voltage directly to the injector.

HTH

 

[Intercooler]

I took out the cam sensor and installed by the book! It cranks right up now even when hot. I think it improved response too. My problem maybe isn't so much at idle but off-idle. Now I get nothing at idle but I blip it and get some smoke. Where is Steve-O-Yaklin? I see two different off-idle settings but don't know if they will help here.

 

[Steve Y]

LOL

OK now mess with pos's 1 and 6

 

[Intercooler]

Originally posted by Steve Y
LOL

OK now mess with pos's 1 and 6

O great swami....which one should I tweak to make the most difference here and not influence WOT?

 

[Steve Y]

Flattery will get you nowhere

LOL

Move 6 up 1 and see.

Mark the cam sensor and turn it like I told you when you get a chance You can put it back easily if you don't like it there...

 

[Reggie West]

Would setting the fuel pressure help with idle using this setup?

I know it will run richer across the board but wont the ME back fuel out?

Just asking.....

 

[Steve Y]

If you lower the fuel pressure Reggie it changes everything.
The ME won't back fuel out or put it in unless you do it manually.
Hope that helps.

 

[Intercooler]

Well I fixed the problem. Will a set of 30 lb. injectors fuel a 70


I swapped to the 30's tonight and no smoke! I am going to leave these in until after I finish farting around.


Steve,

What do you think is the smallest safe injector for this setup? I wish in a way I kept the 65's. Still seems like the best compromise injector at this point.