Could this be bad TFI?

ChunkFunky · 06-03-2003, 06:38 AM

I tried do search on this but I couldnt find my particular issue.

It rained HARD on sunday and it all started happening then, Maybe it's just coincedence...

my new problem is now at part throttle I'm getting some popping through the intake though generaly under WOT its ok... though I'm now finding that at a constant thrrottle of lets say 2500 the car starts to kinda buck... it'll run smooth and then start missing I guess... and then run smooth and miss again...

the popping seems to happen from a stop when I start to drive. But if I'm in neutral and rev it it's not happening, it's only under load. I bought a new module last night.. I didnt put it in yet... but if no one thinks that's the problem I'll just return it and replace whatever you think the problem actualy IS.

Thanks Guys
-as

silver_pilate · 06-03-2003, 03:43 PM

Doesn't sound like TFI to me. The TFI, went it goes out, is usally heat related, and as I'm told, it happens more like a light switch where it's working, and then it's not. It'll leave you stranded with a dead car until it cools off again.

-nathan

ChunkFunky · 06-03-2003, 03:45 PM

yeah I've been reading more about it... I'm not sure what it is... but it seems to be going away... hopefully I can write it off as something getting wet and then drying out
-as

82 GT · 06-03-2003, 05:00 PM

A new TFI module wouldn't be a bad idea anyways if the stock one hasn't been replaced aready.

PKRWUD · 06-05-2003, 12:27 AM

It sounds like a fuel quality issue. Maybe you got a bad tank of gas. It actually sounds like dirty injectors, but since it started suddenly, and now seems to be going away, I'd say it was bad gas.

Take care,
~Chris

ChunkFunky · 06-05-2003, 06:14 AM

hmmm.... I'll write it off as bad gas... it's easier then trying to find some other non existant problem... though at this point I still get a slight buck as steady RPMS... if I just cruise at 2500 it'll run smooth and then give a slight buck every once in a while, maybe every couple seconds... kinda wierd...

the cap, rotor, wires, plugs, and injectors are new about a month ago... they are autozone cheap parts, with exception of the injectors.... wich are Ford.

my biggest issue at this point is the harcore bucking I get at low RPMs... THAT has happened since the day I finished doing the heads and cam and such. It's an AOD and my tranny guy called it
"trailer hitching"... said it was ignition related... it's kinda like if you had a 5 speed and you left it in 5th gear and started to slow down it would just start to get nasty and jerky as you got close to the stall point. I figured I higher stall converter woudl mask the problem... I assume the problem was the torque of this combo was moved up the RPM scale so it doesnt have enough down low.

who knows...
-as

06-03-2003, 06:38 AM	#1
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	Could this be bad TFI? I tried do search on this but I couldnt find my particular issue. It rained HARD on sunday and it all started happening then, Maybe it's just coincedence... my new problem is now at part throttle I'm getting some popping through the intake though generaly under WOT its ok... though I'm now finding that at a constant thrrottle of lets say 2500 the car starts to kinda buck... it'll run smooth and then start missing I guess... and then run smooth and miss again... the popping seems to happen from a stop when I start to drive. But if I'm in neutral and rev it it's not happening, it's only under load. I bought a new module last night.. I didnt put it in yet... but if no one thinks that's the problem I'll just return it and replace whatever you think the problem actualy IS. Thanks Guys -as __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

06-03-2003, 03:43 PM	#2
silver_pilate DURKA DURKA!! Join Date: Sep 1997 Location: Lubbock, TX...(TX panhandle) Posts: 1,418	Doesn't sound like TFI to me. The TFI, went it goes out, is usally heat related, and as I'm told, it happens more like a light switch where it's working, and then it's not. It'll leave you stranded with a dead car until it cools off again. -nathan __________________ '91 GT, Coast 347, 9.5:1 compression, full intake, Wolverine 1087 cam, exhaust, Keith Craft ported Windsor Jr. Irons (235 cfm intake, 195 cfm exhaust), AOD, PI 3500 converter, Lentech valve body, 3.73's (4.10's in the works), and Yokohama ES100's out back. Daily Car: '04 Infiniti G35 Sedan 6MT

06-03-2003, 03:45 PM	#3
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	yeah I've been reading more about it... I'm not sure what it is... but it seems to be going away... hopefully I can write it off as something getting wet and then drying out -as __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit

06-03-2003, 05:00 PM	#4
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	A new TFI module wouldn't be a bad idea anyways if the stock one hasn't been replaced aready. __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

06-05-2003, 12:27 AM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It sounds like a fuel quality issue. Maybe you got a bad tank of gas. It actually sounds like dirty injectors, but since it started suddenly, and now seems to be going away, I'd say it was bad gas. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-05-2003, 06:14 AM	#6
ChunkFunky Registered Member Join Date: Apr 2002 Location: Tustin, CA Posts: 465	hmmm.... I'll write it off as bad gas... it's easier then trying to find some other non existant problem... though at this point I still get a slight buck as steady RPMS... if I just cruise at 2500 it'll run smooth and then give a slight buck every once in a while, maybe every couple seconds... kinda wierd... the cap, rotor, wires, plugs, and injectors are new about a month ago... they are autozone cheap parts, with exception of the injectors.... wich are Ford. my biggest issue at this point is the harcore bucking I get at low RPMs... THAT has happened since the day I finished doing the heads and cam and such. It's an AOD and my tranny guy called it "trailer hitching"... said it was ignition related... it's kinda like if you had a 5 speed and you left it in 5th gear and started to slow down it would just start to get nasty and jerky as you got close to the stall point. I figured I higher stall converter woudl mask the problem... I assume the problem was the torque of this combo was moved up the RPM scale so it doesnt have enough down low. who knows... -as __________________ '89 GT Convertible: TFS TW Heads, TFS Street Intake, TFS Stage 1 Cam, FMS 1.6 RRs, 24# Injectors, Pro-M 75mm MAF, No Name CAI, 3.73s, O/R H-Pipe, FlowMasters, AOD w/ Trans-Go Shift Kit