How do you know a TFI may be going out?

88 Fox GT

Active Member

Nov 18, 2002

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Iowa

Aug 9, 2005

#1

• Aug 9, 2005

• #1

This isn't my Mustang, but rather my 5.0 truck. It won't run. I drove it the other day and it ran just fine all the way to point A to B and back. I parked it in front of my driveway and when I went to start it to put it in the driveway, she wouldn't fire. A few hours later, she fired right up and ran fine. Now it won't fire again. I checked to see if the coil was sparking and it wasn't. So, I tried another coil that did work and it didn't spark either. Could my TFI be going out on this truck? Would a bad TFI keep the coil from sparking? Thanks.

 

jrichker

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Mar 10, 2000

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Dublin GA

Aug 9, 2005

#2

• Aug 9, 2005

• #2

No working TFI = no spark, no matter how hard you try.

My TFI recently died in a similar manner. The engine fired up and promptly died. It refused to start from that point on until I replaced the TFI.

 

88 Fox GT

Active Member

Nov 18, 2002

1,674

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36

Iowa

Aug 9, 2005

#3

• Aug 9, 2005

• #3

I think it's probably the TFI, but the parts house said they can test mine for me and a new one is like $30. So, I will probably go and have it tested tomorrow. I imagine I will probably end up buying a new one cause I know it's fairly common for these to go out and this one has 170k miles on it. Thanks.

 

z9_87

New Member

Apr 16, 2004

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Urbana, IL

Aug 9, 2005

#4

• Aug 9, 2005

• #4

170k, yeah replace it. These things suck, they can go out while you're driving down the road... at 70mph, just die.

 

tripwhite93

New Member

Sep 15, 2004

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Aug 10, 2005

#5

• Aug 10, 2005

• #5

Check out this web site. http://www.dccurrent.com/fbt/tps.htm

 

z9_87

New Member

Apr 16, 2004

332

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Urbana, IL

Aug 10, 2005

#6

• Aug 10, 2005

• #6

Check out this web site. http://www.dccurrent.com/fbt/tps.htm

Click to expand...

TFI, the thing on the side of the distributor, not the TPS.

 

B

bcd

New Member

Jun 23, 2005

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arab al

Aug 10, 2005

#7

• Aug 10, 2005

• #7

they can test a tfi at advanced auto parts

 

G

gork1rogues

New Member

Oct 2, 2003

42

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Aug 10, 2005

#8

• Aug 10, 2005

• #8

My F150 would do the same thing. Start up fine then run for a while, shut off, no start up, wait a while, would start up, then it finally wouldn't start anymore. Replaced the TFI and all is well.

 

tripwhite93

New Member

Sep 15, 2004

8

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0

Aug 11, 2005

#9

• Aug 11, 2005

• #9

z9_87 said:

TFI, the thing on the side of the distributor, not the TPS.

Click to expand...

OOPS your right

 

RsStanG1987

I shaved all my pubes playing this game.

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Mar 13, 2004

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Dupont PA

Aug 11, 2005

#10

• Aug 11, 2005

• #10

My friends car needed one the car would start and run fine, But once it warmed up it would cut out. He replaced and the problem went away.