[RESOLVED] What Happened???

[habitatguy187]

Ok, so I just turned my boost back up to around 15 and had the logger out. I took off down the road just fine, pushed the clutch in to coast to a stop sign, and my engine's idling very rough. I turned the corner and for some reason stepped on it again and it took off fine, then as I was slowing down the car died.

Now it won't run without keeping your foot on the throttle. It starts up fine then instantly dies. But when I drove it home (600 feet) it drove fine, it just won't idle. When I run the logger while keeping the car running it shows 3-4 on o2. Very rich.

I checked for popped off intercooler hoses and did an all around visual inspection and everything looks fine.

What'd I do?

 

[snowborder714]

Post up a log. If your o2 sensor isn't cycling, it's probably bad (but I'm not too familiar with 1g's and their logging programs).
Boost leak test.
Adjust TPS and BISS if necessary.
Check spark plugs/gap and wires.

 

[habitatguy187]

Post up a log. If your o2 sensor isn't cycling, it's probably bad (but I'm not too familiar with 1g's and their logging programs).
Boost leak test.
Adjust TPS and BISS if necessary.
Check spark plugs/gap and wires.

The o2 is cycling, just not in the correct range. I'm thinking it's something besides a boost/vacuum leak because it boosted fine after it happened the first time. Also I do boost leak tests almost religiously.

Also I can only post a log of things besides idle, so I guess I'll do that.

 

[97EclipseGSX]

Provided you didn't change anything else that would affect the cars idle; a bad isc would be the first thing I would look into for idle issues. But I guess it couldn't hurt to do a compression test just to see if for some reason the extra boost put a hurting on the motor.

But now that I see you are still on a maf system its so easy to blame a leak be it post or pre turbo. Thats one good thing about a map based system.

 

[habitatguy187]

Alright guys I found it. You were both right, vacuum/boost leak. One of the vacuum caps on my throttle body popped off under the higher boost pressure. All ok now. Thanks and sorry to jump the gun it just scared me a bit.