HeX

My fd took a dump on me! It had been running so good these few months until a few hours ago! I'm still learning but this one stumped me. Hopefully you guys can help me out.

I was driving fine when I speed up just a bit to get through the yellow light. I slow down and get into a shopping center to get some food. As the car is in low rpm it completely stalls. I check my guages and it says charge battery. I'm thinking I simply stalled and start her up and I notice my idle is way lumpy and jumps from 800rpm to 1000rpm about every 3rd of a second then turns off again. I turn her on and I have to keep reving the car above 2000rpm to keep her from turning off. As i'm driving back home and keep the rpms at about 2500. I can tell something is still wrong because even at low-mid rpms the car still fluctuates very minutely. The car still had its normal pull although I didn't push it to check to see if the second turbo kicked in. As a parked her I noticed light black smoke comming out of the exhaust in pulses along with the lumpy idle. It's always had clean exhaust fumes. Actually, now that I think about it, the car had recently been idling real high at start-up. Around 3000rpm. I usually just blip the throttle and bring it down (thinking AWS). I also notice when the car completely warmed up it would idle kinda lumpy but not to the degree of this night. Some guru got any ideas? I know I need a new hose job and have been told that sometimes a leaking/popped-off hose can cause the high starting idle. But, what about the lumpy idle, the stalling, and the light black smoke?

-HeX

ps. Most people seem to agree it's the map sensor hose. I'll check it tomorrow or when I have time.

rotorbrain

check your FPR hose as well. when the vacc. hose comes the pressure will rise. this allows more fuel to enter the engine and voila. . . black smoke. just a thought.

DO A DAMN HOSE JOB. . . THE WHOOOOOOOLE THING!!

paul

rxrotary2_7

i agree.

turborotarypower

i 3rd that!

Trexthe3rd

Check your alternator output

Toadman

How about the MAP sensor? It's a little black box on a bracketmounted on the firewall above the brake booster. Sometimes the vacuum hose on the underside of it pops off.