Engine Running Very Rough - 3000GT/Stealth International Message Center

Polygon · 04-17-2008, 12:18 PM

I came out this morning to go to the doctors office. When I started the car it started right up but it began running rough. The idle will drop and rise sporadically. I think it's running rich as it stinks of what I would say is fuel while it's running. Also, it does not throw a CEL.

All that has changed recently was that I took off the BCS to pull the plug and broke it. I got another one and put it back on. That was yesterday and it ran fine after I put the new BCS in. I also cleaned the MAS this weekend.

So, I can only suspect a few things right now, but I'm not sure. Please tell me you guys know what's up.

lawdogg · 04-17-2008, 12:19 PM

Your MAS is not plugged in.

Polygon · 04-17-2008, 12:24 PM

Quote:

Originally Posted by lawdogg

Your MAS is not plugged in.

Actually, after I cleaned the MAS I had forgot to plug it back in. After starting it yesterday to get the new BCS plug I knew right away so I popped the hood and plugged it back in and drove off. So, today I checked it again and it's still plugged in, and I even unplugged it a couple of time and plugged it back in.

lawdogg · 04-17-2008, 12:27 PM

Is all the mesh in it and in the correct place? My mesh popped out once and the same thing happened.

ZephTheChef · 04-17-2008, 12:28 PM

Could be a big vacuum leak.

Polygon · 04-17-2008, 12:39 PM

Quote:

Originally Posted by lawdogg

Is all the mesh in it and in the correct place? My mesh popped out once and the same thing happened.

Yep, it's in place but there is a dent that has been there since the day I've had the car.

lawdogg · 04-17-2008, 12:41 PM

White socks FTL.

Can you pressure test?

Polygon · 04-17-2008, 12:42 PM

Quote:

Originally Posted by lawdogg

White socks FTL.

Can you pressure test?

Hey, I like white socks.

Sadly, I have no pressure tester to speak off. I'll go up and check the intake hoses.

lawdogg · 04-17-2008, 12:45 PM

Let us know what you find.

Is the BOV leaking / hooked up loose? All clamps tight?

Blizzind · 04-17-2008, 12:47 PM

I fouled out my spark plugs because of how rich I was running before. You could have done the same with your MAS being unplugged I suppose. I highly doubt it though if it wasn't unplugged for a long period of time. Does it tend to fix its self after running it for a little bit?

04-17-2008, 12:18 PM	#1 (permalink)
Polygon NOTADSM Join Date: May 2006 Location: Utah Drives: '89 GTC & '91 R/T TT Trader Rating: (11)	Engine Running Very Rough I came out this morning to go to the doctors office. When I started the car it started right up but it began running rough. The idle will drop and rise sporadically. I think it's running rich as it stinks of what I would say is fuel while it's running. Also, it does not throw a CEL. All that has changed recently was that I took off the BCS to pull the plug and broke it. I got another one and put it back on. That was yesterday and it ran fine after I put the new BCS in. I also cleaned the MAS this weekend. So, I can only suspect a few things right now, but I'm not sure. Please tell me you guys know what's up. __________________ Clint: 1989 Chrysler LeBaron GTC Turbo II - 1991 Dodge Stealth R/T TT Last edited by Polygon : 04-17-2008 at 12:25 PM.

04-17-2008, 12:19 PM	#2 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Engine Running Very Rough Your MAS is not plugged in. __________________ 94 VR-4: 11.8 @ 116, 17psi, pump, 13Ts

04-17-2008, 12:27 PM	#4 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Engine Running Very Rough Is all the mesh in it and in the correct place? My mesh popped out once and the same thing happened.

04-17-2008, 12:28 PM	#5 (permalink)
ZephTheChef Forum Member Join Date: Nov 2004 Location: Wichita, KS Drives: Red 1991 VR-4 (#3) Trader Rating: (2)	Re: Engine Running Very Rough Could be a big vacuum leak. __________________ "why its a tubloidial butt noid!" - Ray Pampena, 2006

04-17-2008, 12:41 PM	#7 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Engine Running Very Rough White socks FTL. Can you pressure test?

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04-17-2008, 12:45 PM	#9 (permalink)
lawdogg Here for the tuna. Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (65)	Re: Engine Running Very Rough Let us know what you find. Is the BOV leaking / hooked up loose? All clamps tight?

04-17-2008, 12:47 PM	#10 (permalink)
Blizzind <>_<> Join Date: Mar 2007 Location: Raleigh, NC Drives: with lifter tick Trader Rating: (1)	Re: Engine Running Very Rough I fouled out my spark plugs because of how rich I was running before. You could have done the same with your MAS being unplugged I suppose. I highly doubt it though if it wasn't unplugged for a long period of time. Does it tend to fix its self after running it for a little bit?