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View Full Version : Car wants to die at idle.



Evo8you
02-11-2005, 12:37 AM
I resently had 720 densos, 255 walbro,and hks 264/272 cams installed.Now the car wants to die at idle. I had the computer reflashed and the car still idles the same. So I am thinking it might be the injectors might have the wrong lag time or somthing like that. even when giving more or less fuel to the car at idle with the s-afc it doesn't help.

Has anyone had this same problem?

P.S. the car is fine while driving normal or when I step on the gas.

Boosted
02-11-2005, 12:43 AM
is your car tuned to for the injectors and fuel pump? Im assuming your just running rediculously right with that much fuel coming in and with the stock induction box and maf is just choking your engine of air.

Evo8you
02-11-2005, 12:49 AM
Yeah the car is tuned for them.I don't have the stock air box, it's the aem intake.
Maybe the type-s is acting funny with the diferrent vacum that the cams are giving.?

leaveit2bevo
02-11-2005, 01:03 AM
im having probs to not all the time but the car will almost die then come back and almost die. I have the same set up just no cams.

jondukes
02-11-2005, 01:04 AM
isnt there a screw on the throttle body that controlls the a/f at idle?

Evo8you
02-11-2005, 01:08 AM
I'll check it out and see what happens.

turbolarry
02-11-2005, 03:03 AM
Do you have access to a logger? What are your settings on the AFC?

kaane
02-11-2005, 11:44 AM
I have the same problem. I have 720's MR bov, SAFC2 and works 269 cams and P2 flash. I am going to send my ecu back to works to be compensated for 720 injectors and their lag time.

gevo
02-11-2005, 01:53 PM
isnt there a screw on the throttle body that controlls the a/f at idle?

That's what I did. Bumped the idle up to about 950-1000rpm. That eliminated most of my idle probs.

rammsteinmatt
02-11-2005, 02:37 PM
isnt there a screw on the throttle body that controlls the a/f at idle?

That's what I did. Bumped the idle up to about 950-1000rpm. That eliminated most of my idle probs.

so can you let out the clutch in first while idling and not have it stall with the increased idle RPM?

WhiteEvoRS
02-11-2005, 08:22 PM
it might also be the cams that you running!!!

gevo
02-11-2005, 08:29 PM
isnt there a screw on the throttle body that controlls the a/f at idle?

That's what I did. Bumped the idle up to about 950-1000rpm. That eliminated most of my idle probs.

so can you let out the clutch in first while idling and not have it stall with the increased idle RPM?

If you are not going uphill....yes.....But I normally don't do that.

leaveit2bevo
02-11-2005, 08:34 PM
ya I posted about this in another thread, unless the flash was meant to handle the bigger injectors the difference in lag causes you to have idle problems.

evomrguy
02-11-2005, 09:02 PM
With bigger cams you tend to run into a problem with idling, crappy vacuum. Most people just bump the idle up a little higher.

Evo8you
02-14-2005, 01:30 AM
Thanks guys, I moved the idle up and it helped