car cutting out

D

detonate69

Member

Feb 7, 2006

13

1

13

Modesto, CA

Oct 10, 2006

#1

• Oct 10, 2006

• #1

My car stops accellerating at 4300 rpms. I can't figure it out for the life of me. I've even taken it into ford and it's throwing no codes and they say it's running fine. The guy told me it's the injector cut out to protect the engine. Funny thing is it used to rev all the way to 6000 rpms, then after the alternator went out and I changed it, it started doing this. I think it's just coincidence but who knows. I've replaced/upgraded a host of things chasing this down and now think it must be in the computer. any insight?

 

JJ95GTID

Active Member

Sep 22, 2003

1,141

4

49

Phoenix, AZ

Oct 10, 2006

#2

• Oct 10, 2006

• #2

TFI module? Not sure since you didn't say what you replaced so far.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Oct 10, 2006

#3

• Oct 10, 2006

• #3

Agreed with Joe - more info please.

And what happens after it cuts out. Does it run alright once you let the RPM's come down?

Do you run plat plugs? They're known for causing a 4K RPM cut-out. A bad ignition coil can also cause this, as can a failing TFI that Joe mentioned (the TFI will often degrade in short order thereafter).


Good luck.

 

D

detonate69

Member

Feb 7, 2006

13

1

13

Modesto, CA

Oct 10, 2006

#4

• Oct 10, 2006

• #4

I've replaced the ignition coil, cap & rotor, fuel pressure regulator, fuel pump, and also checked the TPS, MAF, Timing. The car acts like it is hitting a rev limiter. If while accellerating I hit 4300 rpms it basically falls on it's face if I shift and drop the rpms it will continue as it should. The car acts normal it just won't rev past 4300 rpms. The plugs are standard motorcraft. What is the TFI?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Oct 10, 2006

#5

• Oct 10, 2006

• #5

detonate69 said:

I've replaced the ignition coil, cap & rotor, fuel pressure regulator, fuel pump, and also checked the TPS, MAF, Timing. The car acts like it is hitting a rev limiter. If while accellerating I hit 4300 rpms it basically falls on it's face if I shift and drop the rpms it will continue as it should. The car acts normal it just won't rev past 4300 rpms. The plugs are standard motorcraft. What is the TFI?

Click to expand...

TFI = Thick Film Ignition. It's the ignition module located on the passenger side fender. In the ground pathway to the coil (the coil's fire is modulated by ground), the TFI supplies the coil with said ground.

Good luck.

 

69clark

Founding Member

Sep 25, 2002

731

7

18

Ravena, NY

Oct 11, 2006

#6

• Oct 11, 2006

• #6

Not to hijack here but does the TFI have to be bolted to the fender. I have mine just tucked up in the fender from when I hid all the wires. Will this cause for problems?

 

D

detonate69

Member

Feb 7, 2006

13

1

13

Modesto, CA

Oct 13, 2006

#7

• Oct 13, 2006

• #7

just wanted to update everyone. It was the TFI (ignition control module) I replaced it and my car works as good as ever. thanks for the advice.

 

T

thagreen1

New Member

Oct 28, 2006

1

0

0

Oct 28, 2006

#8

• Oct 28, 2006

• #8

how much the part...

 

The Green GT

No 13 year olds are safe around me.

10 Year Member

Jan 8, 2006

1,269

19

99

Louisiana

Oct 28, 2006

#9

• Oct 28, 2006

• #9

Stator maybe?

 

Zero Signal

Active Member

Feb 24, 2003

2,633

2

46

Tucson, AZ

Oct 28, 2006

#10

• Oct 28, 2006

• #10

Sounds more like a bad fpr or fuel pump to me. Check your fuel system out.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Oct 28, 2006

#11

• Oct 28, 2006

• #11

Stop guessing. He said it was the TFI.

 

The Green GT

No 13 year olds are safe around me.

10 Year Member

Jan 8, 2006

1,269

19

99

Louisiana

Oct 28, 2006

#12

• Oct 28, 2006

• #12

HISSIN50 said:

Stop guessing. He said it was the TFI.

Click to expand...

I musta missed that part.