Need some guidance on what I should do. Just modded the car with 272 cam gears, upgraded fuel pump, adjustable cam gears set at -2,-2 and new plugs. While in traffic, if I start up, go to about 1,500 to 2,000 rpm move forward about 2 or 3 feet and push the clutch back in and hit the brakes to stop the car will drop rpm's quickly...and stall. Just happened on a busy road this morning. I could not get the car started after stalling. I waited about 10 seconds, tried to get it started, wouldn't started. I had to wait about 90 seconds (which seemed like 5 hours with everyone honking at me), before it would turn over and start.

I am running Vishnu map V390.

Is there a problem with this base map?

Seems like its too much fuel being dumped...?

Is this a Vishnu issue with upgrade cams? or does everyone who upgrades their cams experience this?

 

Are you venting to atmosphere?

 

there is something wrong with your car. check it out. it should never stall.

 

Car is set up stock on the intake side. I am following all of the recommended Vishnu stages according to their website.

Currently stock air filter, stock turbo, stock Intercooler and piping. Only things modified as shown in sig.

 

When you installed the gears, did you use the tooth with the white-out mark on the tooth for TDC reference? Or did you use the "0" mark on the adjustment numbers?

Shiv

 

You do loose vacuum at idle with the 272's which may be why you stalled in the first place. Did you change the clutch? A more agressive clutch with less vacuum will make it easier to stall. If it only happened this one time I really wouldn't worry about it yet. If it becomes routine. Sounds like an Xcede issue, I'd call Vishnu.

 

One thing you can try is set idle at 1000 rpm by adjusting the idle screw. Also check ur plugs too.

 

You already has the XEDE running before you installed the new parts, right? If that was newly installed as well, my first guess is that you pulled the wrong green wire for boost control. The other green wire in that connector is for idle control, btw. Had a customer do that yesterday as well and his car would barely idle

shiv

 

I have been running the Xede with no problems since August 2004. I am pretty confident I have the right green wire. (ran a 12.87 before latest mods)

I just had the latest upgrades (cams, cam gear, fuel pump), and the V390 map non smart 93 Octane loaded last Friday.

The car idles perfectly fine at 900 rpm. This only happened once when it stalled, but it has happened several times where it almost stalled...(ie. dropped down to 300 rpm...) I was able to catch it by hitting the gas. My concern too is that it wouldn't start after it stalled. I had to wait a few minutes before it would turn over.

Does the map need tweaked?

 

stock clutch still. The car idles at 900 rpm no problem. Lopey idle, but the needle never bounces.

 

The map really wont effect idle since both fuel and timing offsets are essentially zero in those zones. My first move, as others have pointed out, would be to open up the idle adjustment screw a little bit. I've had to do that on some cars. Seems as if there is some variance from the factory.

cheers,
shiv

 

Not to sound dumb...whereabouts is the idle screw?

Thanks for the reply.

 

The idle air by-pass screw is on the top/back of the throttle body. It is just a big Phillips screw.

 

My car does the same thing, mainly with the AC/ lights on and only when creeping forward a few feet when not fully disengaging the clutch, esp when turning the steering wheel. Worst is at a right turn on red behind someone and it comes my turn to pull forward. This is the only time it will stall, and again, won't restart for quite some time.

FWIW I've adjusted the idle set screw. That only works on clutch-in and RPM's are falling, it will hold briefly at about 1100 rpm and then the ECU will slowly bring it back to around 900rpm. If I don't completely clutch-out, and then back in, I get the stall conditions. Weird. It also occurs more in hot weather.

And before anyone asks, my cam gears are installed correctly, I installed them the first time and Andrew the second when he put my cams in. I trap at 109.xx mph on pump, and dyno at 280hp on a DD, so I know they aren't off a tooth. My cam's are at -3 -2. And it makes zero difference running Smart or Non-Smart, Cams or no Cams, timing advance or no advance. I'm so used to it by now that I can catch it with the throttle before it stalls or I completely release the clutch before pushing it in again.

 

Does it have a ground wire attached to it? or what appears to me to be a ground wire. That is the only phillips screw I see on the thottle body.