Ignition Problem ?

ExplodingGopher

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Jun 11, 2004

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The mistake on the lake (Ohio)

Oct 17, 2004

#1

• Oct 17, 2004

• #1

Ok this just started recently with my 5.0. At WOT the car takes off great but once it hits 4,000 rpm or above it stutters like mad and backfires like hell. Got a new dist cap and rotor < Accel. and checked the wires which are fine, no arcing at all. Could this be timing? I am replacing the fuel filter tomarrow incase the old one is clogged and starving the engine at WOT. Specs in sig.

 

jrichker

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Mar 10, 2000

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Dublin GA

Oct 17, 2004

#2

• Oct 17, 2004

• #2

High RPM miss on a warm engine is usually associated with a failing TFI module.

 

ExplodingGopher

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Jun 11, 2004

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The mistake on the lake (Ohio)

Oct 17, 2004

#3

• Oct 17, 2004

• #3

What is a TFI module and what does it do. how much is a new one.
("Who is your daddy, and what does he do." -Arnold S.)

 

HISSIN50

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

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Nov 29, 1999

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Oct 18, 2004

#4

• Oct 18, 2004

• #4

TFI is on the side of the dizzy housing.

what are your plugs gapped at? you could simply be overrunning the plug gaps (though i agree in full with JR, im trying to think of something simple and cheap to check first).

good luck.

 

9

90pony302

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Mar 16, 2004

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southern illinois

Oct 18, 2004

#5

• Oct 18, 2004

• #5

definitely check the little things first. Plugs, wires, cap and rotor....which its sounds like you did already. Autozone can check ur tfi module for you. Other things to check would be coil, pickup in the dizzy(cheaper than gettin a new tfi). Also i think the zone quoted me like 65 bucks on a new tfi.