95 GT bogs when its cold

Stang95fyvo · Oct 15, 2005

Need some help with this one.

My 95 GT runs awesome once its warmed up and is really strong and pulls really hard considering its almost completely stock when compared to other ones I have driven. But when its cold, it bogs when I try to get it moving unless I rev it pretty high (like 2000 rpms or so). Sometimes it also sounds like it backfires, then it picks right up and is okay. Does anyone else's car do this? Seems a little odd to me. Although Neither of my 5.0s like to run cold.

Also I have a rattling sound that changes when I rev the motor, both with the clutch in and the clutch out? It seems to be coming from the area of the cats. Any ideas?

Any input would be greatly appreciated. Thanks

18mustangs · Oct 16, 2005

Stang95fyvo said:
Need some help with this one.

My 95 GT runs awesome once its warmed up and is really strong and pulls really hard considering its almost completely stock when compared to other ones I have driven. But when its cold, it bogs when I try to get it moving unless I rev it pretty high (like 2000 rpms or so). Sometimes it also sounds like it backfires, then it picks right up and is okay. Does anyone else's car do this? Seems a little odd to me. Although Neither of my 5.0s like to run cold.

Also I have a rattling sound that changes when I rev the motor, both with the clutch in and the clutch out? It seems to be coming from the area of the cats. Any ideas?

Any input would be greatly appreciated. Thanks

The rattling sound could be the heat shields on your cats. A few years ago when I had cats my heat shields were loose and made the sound you're describing. I put some snake clamps on them and that solved the rattle.
Tim

Synned · Oct 16, 2005

My car is the exact opposite. It runs amazing when its cold, opposite when its hot. It'll bog, hesitate and sometimes backfire as well.

Maybe its your ECT?

juiced_94gt · Oct 16, 2005

my car does the bogging in the morning too, i was going to start a thread right now, what are the odds, i just installed a MSD Dizzy yesterday and also a Pro-M Mass Air, it used to do it before also but today in the morning it almost died when i took off, but once it's down the street it runs like a champ...any suggestions?

Stang95fyvo · Oct 16, 2005

juiced_94gt said:
my car does the bogging in the morning too, i was going to start a thread right now, what are the odds, i just installed a MSD Dizzy yesterday and also a Pro-M Mass Air, it used to do it before also but today in the morning it almost died when i took off, but once it's down the street it runs like a champ...any suggestions?

ditto about the almost dying part...I cant figure it out. I dont have any mods that change any components of the engine so I dont know what it is.

RE: the ECT...it better not be that...the car only has 66k miles on it.

KamiKaziDK · Oct 16, 2005

That's odd, in the winter my car whistles at me for a few minutes in the morning when I first start it up, lol

urban96 · Oct 16, 2005

mine has been doing the SAME thing

bogs, sometimes i get the slight backfire on the 1-2 shift but 3-4 mins of driving and it goes away

i have a lot of mods tho so i dunno where to start looking

never did this tho when i had the AODE and old computer in there

jawsgt · Oct 16, 2005

mine does the same thing in the mornings, sumtimes does stall after i back up and push the clutch in so i gatta watch my tach

MLC Stang · Oct 17, 2005

Guys,

If it's temperature related, it's the ECT sensor!

The ECT sensor takes the place of a choke on a car with a carburetor. It richens the A/F ratio on a cold engine and leans it out one the engine warms to operating temperature.

The ECT (and the ACT) are thermistors (variable resistors). The thermal properties of thermistors degrade over time particularly in a high temperature environment. So, even at 66K, your ECT could be off enough to screw up your A/F ratio.

Replace it. It's not that expensive and takes 10 minutes to swap out.

Stang95fyvo · Oct 17, 2005

MLC Stang said:
Guys,

If it's temperature related, it's the ECT sensor!

The ECT sensor takes the place of a choke on a car with a carburetor. It's richens the A/F ratio on a cold engine and leans it out one the engine warms to operating temperature.

The ECT (and the ACT) are thermistors (variable resistors). The thermal properties of thermistors degrade over time particularly in a high temperature environment. So, even at 66K, your ECT could be off enough to screw up your A/F ratio.

Replace it. It's not that expensive and takes 10 minutes to swap out.

Sounds like a plan. I might do that this week. I will let you all know how it goes.

a_k · Oct 17, 2005

urban96 said:
mine has been doing the SAME thing

bogs, sometimes i get the slight backfire on the 1-2 shift but 3-4 mins of driving and it goes away

i have a lot of mods tho so i dunno where to start looking

never did this tho when i had the AODE and old computer in there

mine does the same exact thing.

DaveB · Oct 17, 2005

Wow, I thought I was the only one with that problem . When my car is cold in the morning, usually when Im first moving it, if I dont give it enough throttle itll bog horribly, and want to stall out. But give it some more gas and it goes back to where it should be power wise. It only happens in first gear though, when I first get moving, and at really low rpms.

Stang95fyvo · Oct 17, 2005

DaveB said:
Wow, I thought I was the only one with that problem . When my car is cold in the morning, usually when Im first moving it, if I dont give it enough throttle itll bog horribly, and want to stall out. But give it some more gas and it goes back to where it should be power wise. It only happens in first gear though, when I first get moving, and at really low rpms.

same here...hopefully the ECT sensor is just tripping and a change of ECTs will cure it.

a_k · Oct 17, 2005

yeah when its real cold sometimes I almost stall first... it's real weird for the first minute or two

ARBOC · Oct 18, 2005

My car does that also.

94 GT

Chowder Head · Oct 18, 2005

Holy hell, what are the odds? I have the same problem and was about to make a thread about it.

My car is is the same way. When I start it up and try to drive off or back up, you can hear it bog down and doesn't want to move at all. If I try to give it gas it usually stumbles and stutters. This will happen for the first 2-3 minutes of driving, then it's perfect.

I think I might try the ECT sensor. Is there any particular brand to get? And where can I find a cheap one at?

Thanks guys!

MLC Stang · Oct 18, 2005

Guys,

Heres the Ford part number for the ECT for a 94/95 5.0:

ECT sensor: F2ZZ-9G428-B (about $50 list at dealer)

EDIT: Above is wrong part number!!! Here's the right number: F2AZ-12A648-A

You can get them for about half that at an auto parts store - NAPA, Auto Zone, Advance, etc.

84convertablegt · Oct 18, 2005

hey, mine does the same thing too i even have the cat rattle as well all of a sudden

Synned · Oct 18, 2005

Maybe they put a time lock on our cars and stuff will start to break 10 years later mileage doesnt matter its all about the years!!
WTF am i talking about.

Chowder Head · Oct 18, 2005

MLC Stang said:
Guys,

Heres the Ford part number for the ECT for a 94/95 5.0:

ECT sensor: F2ZZ-9G428-B (about $50 list at dealer)

You can get them for about half that at an auto parts store - NAPA, Auto Zone, Advance, etc.

Hmmm....when I searched the part number online, it only said it was a EGR valve position sensor. https://www.rockauto.com/dbphp/mfr,MOTORCRAFT,Emission,5092,EGR+Valve+Position+Sensor

95 GT bogs when its cold

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