Need help with vibration in new motor!! (5th gear shimmies) PLEASE HELP!!

skiwesser · 07-01-2006, 11:28 PM

Okay I got codes 91- O2 sensor low voltage/system leanor voltage out of range so I need new O2's.
But I also got code 95- Fuel pump secondary circuit fault.
What is this? Either of these could be my problem because it runs fine every day until i shut it off so I guess it's running rich as per called for by cpu when I've just started it for the day.
but what is this code 95 and how do I fix it??
HELP
THANKS
WES

skiwesser · 07-11-2006, 01:19 PM

New O2's didn't fix it so I guess I'll try the ECT, isn't that the sensor screwed into the intake? If I unplug it and see if it runs diffrent will that tell me if it's bad b-4 I buy a new one? I'm still looking for loose wires (grounds) and arking sparks (in the dark) but to no avail.
I am going nuts this thing runs great in the morning but I gotta drive it to the track and shut it off so I won't know what it'll really run until I fix this, it wasn't doing it b-4 the rebuild so It's gotta be somthing I can track, right?
HELP ME PLEASE

Hozer 88GTConv · 07-12-2006, 04:07 PM

Have you run a cylinder balance test with a Actron code scanner?
I'd do a KOER test after it is hot and exhibiting the symptoms you are describing and then follow it with a cylinder balance test.
It will identify a weak or weak cylinders and should really help you eliminate much of your troubleshooting considerations.
I'd also talk to your longtube vendor and see if they have heard of probs with 02's at those locations not providing temp readings within the range of OEM 02's. A voltage calibration may be necessary...
good luck...

skiwesser · 07-22-2006, 09:04 PM

Well I broke the tranny this week (3rd) so I'll have to fix that first and keep chasing this grimlin.
BTW what is a cylinder balance check?
I never heard of that.
Thanks
Wes

v8-7 · 07-23-2006, 01:05 PM

Here is a good article on how to get codes, and some info on what tests can be run , including how to do a balance test and a description of what it is .

http://www.mustangworks.com/articles...-iv_codes.html

I'm trying to track down a code 95 as well, but I doubt that is your problem.

07-01-2006, 11:28 PM	#1
skiwesser Registered Member Join Date: Sep 2000 Location: rock hill,S.C. 29730 Posts: 420	Re: Need help with vibration in new motor!! (5th gear shimmies) PLEASE HELP!! Okay I got codes 91- O2 sensor low voltage/system leanor voltage out of range so I need new O2's. But I also got code 95- Fuel pump secondary circuit fault. What is this? Either of these could be my problem because it runs fine every day until i shut it off so I guess it's running rich as per called for by cpu when I've just started it for the day. but what is this code 95 and how do I fix it?? HELP THANKS WES __________________ 88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ

07-11-2006, 01:19 PM	#2
skiwesser Registered Member Join Date: Sep 2000 Location: rock hill,S.C. 29730 Posts: 420	Re: Need help with vibration in new motor!! (5th gear shimmies) PLEASE HELP!! New O2's didn't fix it so I guess I'll try the ECT, isn't that the sensor screwed into the intake? If I unplug it and see if it runs diffrent will that tell me if it's bad b-4 I buy a new one? I'm still looking for loose wires (grounds) and arking sparks (in the dark) but to no avail. I am going nuts this thing runs great in the morning but I gotta drive it to the track and shut it off so I won't know what it'll really run until I fix this, it wasn't doing it b-4 the rebuild so It's gotta be somthing I can track, right? HELP ME PLEASE __________________ 88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ

07-12-2006, 04:07 PM	#3
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Re: Need help with vibration in new motor!! (5th gear shimmies) PLEASE HELP!! Have you run a cylinder balance test with a Actron code scanner? I'd do a KOER test after it is hot and exhibiting the symptoms you are describing and then follow it with a cylinder balance test. It will identify a weak or weak cylinders and should really help you eliminate much of your troubleshooting considerations. I'd also talk to your longtube vendor and see if they have heard of probs with 02's at those locations not providing temp readings within the range of OEM 02's. A voltage calibration may be necessary... good luck... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

07-22-2006, 09:04 PM	#4
skiwesser Registered Member Join Date: Sep 2000 Location: rock hill,S.C. 29730 Posts: 420	Re: Need help with vibration in new motor!! (5th gear shimmies) PLEASE HELP!! Well I broke the tranny this week (3rd) so I'll have to fix that first and keep chasing this grimlin. BTW what is a cylinder balance check? I never heard of that. Thanks Wes __________________ 88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306. DYNO TUNED TO 300.97 RWHP 337RWTQ

07-23-2006, 01:05 PM	#5
v8-7 Registered Member Join Date: Jul 2006 Posts: 13	Re: Need help with vibration in new motor!! (5th gear shimmies) PLEASE HELP!! Here is a good article on how to get codes, and some info on what tests can be run , including how to do a balance test and a description of what it is . http://www.mustangworks.com/articles...-iv_codes.html I'm trying to track down a code 95 as well, but I doubt that is your problem.

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