5.0 problems

ebo 4356 · July 16th, 2008, 01:31 PM

My friend has a 1995 5.0 and there is a nasty miss in the low rpms but when you get above 2500 it clears up. He already changed plugs, wires, etc, but we were thinking maybe the O2 sensors. Anybody have any ideas.

G.T. Rags · July 16th, 2008, 07:02 PM

post this in the 5.0 section for a better responce......

whats the condition of his distributor....

97S281 · July 17th, 2008, 04:28 PM

Double check the plug gap.

ujslost · July 17th, 2008, 06:36 PM

I bet its a vacum leak. Vacum leaks will only show up at low rpms. They dont show up at higher rpms. Reason being because when you stomp it or go to higer rpms vac gets lower. If you had a vac gauge or boost gauge you could literally see this happening.

Check for vac leaks especially the hose to the pcv valve. Located on the lower intake towards the rear of the engine. That and the hoses under the upper intake can sometimes come off.

July 16th, 2008, 01:31 PM	#1
ebo 4356 Regular 1997 Mustang GT 14.1140@99.36(need traction) Join Date: Jul 2007 Location: Western Pennsylvania Posts: 179 iTrader: 0 reviews	5.0 problems My friend has a 1995 5.0 and there is a nasty miss in the low rpms but when you get above 2500 it clears up. He already changed plugs, wires, etc, but we were thinking maybe the O2 sensors. Anybody have any ideas. __________________ 1997 Mustang GT Mac off-road H pipe, Magnaflow Magnapacks, Full Pi Swap, 3.73s, JLT ram air intake, Ram HDX clutch, MSD coils, MSD wires, Trickflow 75mm Throttle body, Trickflow intake plenum, MGW short shifter.

July 17th, 2008, 04:28 PM	#3
97S281 Rollin' 18/ pushin' 2 1997 Saleen S281 Join Date: Feb 2007 Location: The lost highway Posts: 6,673 iTrader: 13 reviews	Double check the plug gap. __________________ MODS IN GARAGE NCMM ORIGINAL BLOWN 96-98 CREW MEMBER # 1

July 17th, 2008, 06:36 PM	#4
ujslost MM Fanatic Join Date: Mar 2007 Location: Albertville, AL Posts: 3,920 Blog Entries: 1 iTrader: 1 reviews	I bet its a vacum leak. Vacum leaks will only show up at low rpms. They dont show up at higher rpms. Reason being because when you stomp it or go to higer rpms vac gets lower. If you had a vac gauge or boost gauge you could literally see this happening. Check for vac leaks especially the hose to the pcv valve. Located on the lower intake towards the rear of the engine. That and the hoses under the upper intake can sometimes come off. __________________ 1986 Mustang GT t-top time piece!

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