Smoke....

94GTConv · 06-17-2002, 04:43 AM

Whenever I'm driving and my RPM's start getting up toward 4,500-5,500 my car starts to smoke slighty (dark smoke). If not visible you can smell it.
Any ideas on what possible problems could be?
Thanks guys.

PKRWUD · 06-17-2002, 05:03 AM

Dark (black) smoke is unburned fuel. If you're seeing it at WOT, I'd check your fuel pressure regulator.

Take care,
-Chris

tireburner163 · 06-17-2002, 01:20 PM

Yea, I agree with PKRWUD, sounds like it's running rich

RPM427 · 06-17-2002, 01:37 PM

Do you have an adjustable FPR? If so, it needs to be turned down a couple of PSI.

94GTConv · 06-18-2002, 09:02 AM

Hey guys... Appreciate the info. No it's not adjustable, so how would I go about checking it? I did get computer codes 181 and 189 yesterday stating it was running rich, good call.
So how do I fix it?
Thanks again,
Don

RPM427 · 06-18-2002, 10:03 AM

a few ways:

First get yourself a fuel pressure gauge. screww it into the fuel rail (they usually come with adapters)

start the engine and see what the pressure is at idle. It should be between 37-41 psi

pull the vacum tube off of the regulator and keep an eye on the pressure, it should go up, also check that you r getting vacum at that line. If it doesn't go up, then your regulator is shot. also, check to see if the pressure holds when you turn the engine off. It sounds like your FPR is no good, BUT hook a scanner up to it and get all of the error codes, and see if something else is cuasing it to run rich, ie. O2 sensor,map, or mass airflow.

Good luck

06-17-2002, 04:43 AM	#1
94GTConv Registered Member Join Date: Feb 2002 Location: So California Posts: 65	Smoke.... Whenever I'm driving and my RPM's start getting up toward 4,500-5,500 my car starts to smoke slighty (dark smoke). If not visible you can smell it. Any ideas on what possible problems could be? Thanks guys.

06-17-2002, 05:03 AM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Dark (black) smoke is unburned fuel. If you're seeing it at WOT, I'd check your fuel pressure regulator. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-17-2002, 01:20 PM	#3
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Yea, I agree with PKRWUD, sounds like it's running rich __________________ 1987 Buick T-type 1998 HD Electra Elide

06-17-2002, 01:37 PM	#4
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	Do you have an adjustable FPR? If so, it needs to be turned down a couple of PSI. __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

06-18-2002, 10:03 AM	#6
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	a few ways: First get yourself a fuel pressure gauge. screww it into the fuel rail (they usually come with adapters) start the engine and see what the pressure is at idle. It should be between 37-41 psi pull the vacum tube off of the regulator and keep an eye on the pressure, it should go up, also check that you r getting vacum at that line. If it doesn't go up, then your regulator is shot. also, check to see if the pressure holds when you turn the engine off. It sounds like your FPR is no good, BUT hook a scanner up to it and get all of the error codes, and see if something else is cuasing it to run rich, ie. O2 sensor,map, or mass airflow. Good luck __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

06-18-2002, 09:02 AM	#5
94GTConv Registered Member Join Date: Feb 2002 Location: So California Posts: 65	Hey guys... Appreciate the info. No it's not adjustable, so how would I go about checking it? I did get computer codes 181 and 189 yesterday stating it was running rich, good call. So how do I fix it? Thanks again, Don

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