96 mustang 3.8

Nate3.8 · January 13th, 2012, 01:28 PM

i am still having the same issue with my 96 3.8 mustang. having hesitation issues and car will not acclerate at all i can floor it and it will sputter.at times will stall out a 55 mph. also i can ride at 2200 rpm and will run ok on highway but push to WOT and will bog down.

I have now changed plugs, cam sensor, cranksensor, tps, fuel pump and filter, computer, MAF.
Cats have been removed has dual exhaust. (car ran great after exhaust and cat removal for about a month.)
have cleaned IAC and throttle body.

Please need help even ford dealer has givin up they put computer and MAF on and didnt fix.

xtreme 2 · January 13th, 2012, 01:37 PM

didn't see any mention of O2 sensors. Have you checked them?

Have you by chance check your a/f ratio?

Do you have a handheld tuner? Checking your short term fuel trims would be a good notation.

1.) Start the car with the tuner plugged in.
2.) Go to Datalog and select to view your short term fuel trims (the abbreviations are different depending on the tuner)
3.) Watch the variance of the trims at idle for 10 seconds.
4.) 1500 rpm for 10 seconds.
5.) 2000 rpm for 10 seconds.
6.) 2500 rpm for 10 seconds.
7.) 3000 rpm for 10 seconds.

How do they look? At each point they should not vary from 0 much. On a diablosport they should stay between +-3%. On an SCT I believe it should stay between +-1.5.

How is your fuel pressure?

Nate3.8 · January 13th, 2012, 02:10 PM

fuel pressure is good. dont have a tuner but have a OTC scanner that can run datastream.

yeah i show have a b1s1 bad O2 will be getting one today. just didnt think that the O2 would make it run as bad as it does.

mustangmike! · January 13th, 2012, 02:16 PM

check vacuum hoses ?

xtreme 2 · January 13th, 2012, 02:19 PM

totally will... O2 sensor controls your A/F. Get that fixed and reset the computer to see if it fixes.

mustangmike! · January 13th, 2012, 02:44 PM

Originally Posted by xtreme 2

totally will... O2 sensor controls your A/F. Get that fixed and reset the computer to see if it fixes.

This is true, but surely not that bad would it ? Never seen an O2 cause that big of a problem but hey you never know I guess

xtreme 2 · January 13th, 2012, 02:47 PM

mine bogged like ass on WOT accelleration.

If you think only one is bad, swap the O2s and see if the problem jumps to the other bank. Generally it's the passenger side that goes bad first.

mustangmike! · January 13th, 2012, 02:54 PM

Originally Posted by xtreme 2

mine bogged like ass on WOT accelleration.

If you think only one is bad, swap the O2s and see if the problem jumps to the other bank. Generally it's the passenger side that goes bad first.

Yup and I wonder if that AC issue contributes to that at all lol

xtreme 2 · January 13th, 2012, 02:58 PM

which AC issue?

mustangmike! · January 13th, 2012, 03:03 PM

dripping on the manifold

xtreme 2 · January 13th, 2012, 03:06 PM

oh I'm sure it does. had mine bust on me last summer...

mustang227 · January 13th, 2012, 04:34 PM

You might have an air leak somewhere. Check all over your intake past the MAF. Also check the vacuum hoses like mustangmike! said.

Nate3.8 · January 13th, 2012, 08:14 PM

I have replaced about ever vaccum hose. But yeah its throwing an O2 code and to lean code for that bank.

Nate3.8 · January 17th, 2012, 12:48 PM

finally got it fixed. Passenger side upper O2 sensor was the issue. i couldnt get it out of the manifold. so i had to get a new O2 bung and weld a new on in. but runs so much better. i am going to change the driver side soon just to avoid this issue again.

January 13th, 2012, 01:28 PM	#1
Nate3.8 96 3.8 1996 mustang 3.8 Join Date: Jan 2012 Location: Easley, SC Posts: 44 iTrader: 0 reviews	96 mustang 3.8 i am still having the same issue with my 96 3.8 mustang. having hesitation issues and car will not acclerate at all i can floor it and it will sputter.at times will stall out a 55 mph. also i can ride at 2200 rpm and will run ok on highway but push to WOT and will bog down. I have now changed plugs, cam sensor, cranksensor, tps, fuel pump and filter, computer, MAF. Cats have been removed has dual exhaust. (car ran great after exhaust and cat removal for about a month.) have cleaned IAC and throttle body. Please need help even ford dealer has givin up they put computer and MAF on and didnt fix.

January 13th, 2012, 01:37 PM	#2
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	didn't see any mention of O2 sensors. Have you checked them? Have you by chance check your a/f ratio? Do you have a handheld tuner? Checking your short term fuel trims would be a good notation. 1.) Start the car with the tuner plugged in. 2.) Go to Datalog and select to view your short term fuel trims (the abbreviations are different depending on the tuner) 3.) Watch the variance of the trims at idle for 10 seconds. 4.) 1500 rpm for 10 seconds. 5.) 2000 rpm for 10 seconds. 6.) 2500 rpm for 10 seconds. 7.) 3000 rpm for 10 seconds. How do they look? At each point they should not vary from 0 much. On a diablosport they should stay between +-3%. On an SCT I believe it should stay between +-1.5. How is your fuel pressure? __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

January 13th, 2012, 02:16 PM	#4
mustangmike! I Post Entirely Way Too Much 2004,1994,1967 14.37 @ 96 Join Date: Aug 2008 Location: Texas Posts: 6,018 iTrader: 1 reviews	check vacuum hoses ? __________________ 227whp N/A V6 Now w/ 8th Mile 8s ! How To Jmod Your Late Model 4R70W

January 13th, 2012, 02:19 PM	#5
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	totally will... O2 sensor controls your A/F. Get that fixed and reset the computer to see if it fixes. __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

January 13th, 2012, 02:47 PM	#7
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	mine bogged like ass on WOT accelleration. If you think only one is bad, swap the O2s and see if the problem jumps to the other bank. Generally it's the passenger side that goes bad first. __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

January 13th, 2012, 02:10 PM	#3
Nate3.8 96 3.8 1996 mustang 3.8 Join Date: Jan 2012 Location: Easley, SC Posts: 44 iTrader: 0 reviews	fuel pressure is good. dont have a tuner but have a OTC scanner that can run datastream. yeah i show have a b1s1 bad O2 will be getting one today. just didnt think that the O2 would make it run as bad as it does.

January 13th, 2012, 02:58 PM	#9
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	which AC issue? __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

January 13th, 2012, 03:03 PM	#10
mustangmike! I Post Entirely Way Too Much 2004,1994,1967 14.37 @ 96 Join Date: Aug 2008 Location: Texas Posts: 6,018 iTrader: 1 reviews	dripping on the manifold __________________ 227whp N/A V6 Now w/ 8th Mile 8s ! How To Jmod Your Late Model 4R70W

January 13th, 2012, 03:06 PM	#11
xtreme 2 Hardcore Enthusiast 2001 v6 premium Join Date: Nov 2008 Location: Tulsa, OK Posts: 1,340 Blog Entries: 1 iTrader: 0 reviews	oh I'm sure it does. had mine bust on me last summer... __________________ Screw it, coming to play with the big boys... 5.4L Vortech COMING SOON!

January 13th, 2012, 04:34 PM	#12
mustang227 Regular Join Date: Apr 2009 Posts: 88 iTrader: 0 reviews	You might have an air leak somewhere. Check all over your intake past the MAF. Also check the vacuum hoses like mustangmike! said. __________________ UDP, Cai, MAC LT's, Divorced duals with original 40's, Predator performance tune

January 13th, 2012, 08:14 PM	#13
Nate3.8 96 3.8 1996 mustang 3.8 Join Date: Jan 2012 Location: Easley, SC Posts: 44 iTrader: 0 reviews	I have replaced about ever vaccum hose. But yeah its throwing an O2 code and to lean code for that bank.

January 17th, 2012, 12:48 PM	#14
Nate3.8 96 3.8 1996 mustang 3.8 Join Date: Jan 2012 Location: Easley, SC Posts: 44 iTrader: 0 reviews	finally got it fixed. Passenger side upper O2 sensor was the issue. i couldnt get it out of the manifold. so i had to get a new O2 bung and weld a new on in. but runs so much better. i am going to change the driver side soon just to avoid this issue again.

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