Why Is My Car Running Rich And Idling Kind Of Rough?

Onerare91LX · 04-20-2002, 11:06 AM

I just got done with the engine on my car, I put on TFS heads, TFS intake etc. I put on a full off-road exhaust so it is gonna smell a little rich but not as much as it should. When the car idles it pretty much shakes the car like if I have a cam in it? I'm running the timing at 16*, FP at 38psi, and TPS .96. WTF could be wrong? I didn't do all of this in one day it took a while I took my time and did things right. My dad noticed something so let me hear if this could be the problem? He noticed a few injectors are higher than the others in the lower. We didn't bother changing the o-rings because they were still good but should we take out the fuel rail and put new ones in? Is there anything else that could be causing this? Thanks

Stang Runner · 04-20-2002, 05:23 PM

Are all the grounds on nice and tight...and Clean too.

Onerare91LX · 04-20-2002, 05:25 PM

Yup, It runs great as soon as it comes off idle.

Stang Runner · 04-20-2002, 05:28 PM

I am in the same Boat aswell trying to get it running good Well I think the O2's are bad on my car.....did you run Codes?

Mach 1 · 04-20-2002, 05:36 PM

Does it have a "surging idle"? Im not sure what you mean by "rough".

A surging idle is a common problem with these cars and is something a lot of us have learned to live with.

04-20-2002, 11:06 AM	#1
Onerare91LX Registered Member Join Date: Mar 2002 Location: DeKalb, IL Posts: 41	Why Is My Car Running Rich And Idling Kind Of Rough? I just got done with the engine on my car, I put on TFS heads, TFS intake etc. I put on a full off-road exhaust so it is gonna smell a little rich but not as much as it should. When the car idles it pretty much shakes the car like if I have a cam in it? I'm running the timing at 16*, FP at 38psi, and TPS .96. WTF could be wrong? I didn't do all of this in one day it took a while I took my time and did things right. My dad noticed something so let me hear if this could be the problem? He noticed a few injectors are higher than the others in the lower. We didn't bother changing the o-rings because they were still good but should we take out the fuel rail and put new ones in? Is there anything else that could be causing this? Thanks __________________ 1991 mustang LX 5.0 AOD Calypso Green (1of 370 Made!) Modifications:BBK Fenderwell CAI, Pro-Flow Chrome Bullet MAF, Accufab 65mm TB, Kirban AFPR, BBK Fuel Pressure Gauge, TrickFlow Street Heat Intake, Trick Flow 3/8 spacer, FMS 24lb Injectors, TrickFlow Valve Covers, TrickFlow Twisted Wedge Heads, FMS 1.6 RR's, 2.02/1.60 Ferrea valves, MSD Coil, FMS Plug Wires, FMS Air Pump Idler Pulley, FMS A/C Eliminator, Lentech Street Terminator Valve Body, TrickFlow Trans Pan, B&M Trans Cooler, AFM Switch Panel, FMS Ceramic Coated Shorty Headers, Bassani O/R X-pipe, Dynomax "Race Magnum" Cat-Back, Auto-meter Gauge Cage & Water Temp & Oil Pressure Gauges, Walbro 255lph Fuel Pump, FMS 4.10 Gear, FMS 5-Lug Conversion, R58 '95 Cobra R Wheels.

04-20-2002, 05:23 PM	#2
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	Are all the grounds on nice and tight...and Clean too. __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

04-20-2002, 05:25 PM	#3
Onerare91LX Registered Member Join Date: Mar 2002 Location: DeKalb, IL Posts: 41	Yup, It runs great as soon as it comes off idle. __________________ 1991 mustang LX 5.0 AOD Calypso Green (1of 370 Made!) Modifications:BBK Fenderwell CAI, Pro-Flow Chrome Bullet MAF, Accufab 65mm TB, Kirban AFPR, BBK Fuel Pressure Gauge, TrickFlow Street Heat Intake, Trick Flow 3/8 spacer, FMS 24lb Injectors, TrickFlow Valve Covers, TrickFlow Twisted Wedge Heads, FMS 1.6 RR's, 2.02/1.60 Ferrea valves, MSD Coil, FMS Plug Wires, FMS Air Pump Idler Pulley, FMS A/C Eliminator, Lentech Street Terminator Valve Body, TrickFlow Trans Pan, B&M Trans Cooler, AFM Switch Panel, FMS Ceramic Coated Shorty Headers, Bassani O/R X-pipe, Dynomax "Race Magnum" Cat-Back, Auto-meter Gauge Cage & Water Temp & Oil Pressure Gauges, Walbro 255lph Fuel Pump, FMS 4.10 Gear, FMS 5-Lug Conversion, R58 '95 Cobra R Wheels.

04-20-2002, 05:28 PM	#4
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	I am in the same Boat aswell trying to get it running good Well I think the O2's are bad on my car.....did you run Codes? __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

04-20-2002, 05:36 PM	#5
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	Does it have a "surging idle"? Im not sure what you mean by "rough". A surging idle is a common problem with these cars and is something a lot of us have learned to live with. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142