4.9 running rough

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May 31, 2014 | 10:12 PM

rwcloud

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Junior Member

Joined: Aug 2012

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4.9 running rough

my 96 F150 is running rich

I have changed

Distributor
Cap
Rotor
Wires
coil
Plugs
EGR
Injectors

Truck is in time but runs like poo

any suggestions

Thanks ray

Jun 1, 2014 | 03:05 AM

Rusty but trusty

Drive like you stole it

Joined: Mar 2013

Posts: 884

Likes: 70

From: Where the snow/salt is

Check codes. Failed o2 sensor puts the computer into open loop=rich. And check codes.

Jun 2, 2014 | 07:12 AM

memoniz

Senior Member

Joined: Jul 2012

Posts: 535

Likes: 63

From: Raleigh, NC

What Rusty said. But I found that mine runs better between 14 and 16 BTDC then 10.

Jun 3, 2014 | 09:03 PM

Chris_1

5 Year Member

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Joined: Mar 2014

Posts: 5,811

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From: Ontario, Canada

check the sensors with a voltmeter. check the fuel pressure regulator for leaking into the vacuum hose and operating correctly. check vacuum lines for leaks

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