Pickup just out of the blue started running rough. Was still able to drive it.

SMITTY514

MEMBER
1991 FORD F-150
5.0L
V8
4WD
AUTOMATIC
17,000 MILES

Pickup started running rough. Can start the pickup just fine. Will only run if I pump the foot feed. Replaced Throttle position sensor, plugs, wires, rotor, distributor cap, and fuel filter. And ECM. Still doing the same thing. The next thing I was thinking about was the idle control valve. I switched tanks to try and rule out fuel pump. Still had problem after doing this. Could it possible be Fuel injectors causing my problem? Can you help me? Thanks

3 Replies

CJ MEDEVAC

MECHANIC
11,005 POSTS

PLEASE SEE MY LINK BELOW

http://www.2carpros.com/questions/2005-ford-escape-rough-idle-at-low-rpm

I'VE SEEN THE "THE LITTLE SMACK" THING WORK SEVERAL TIMES, IN WHICH THE IDLE DID, AT LEAST FOR A MOMENT, STRAIGHTEN UP TO VERIFY THAT THE IAC WAS THE ISSUE. IF YOU TRY TO CLEAN IT AND THE HOLE IT'S OVER, USE THROTTLE BODY CLEANER.

RETURN WITH GOOD NEWS

THE MEDIC

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Tuesday, October 13th, 2015 AT 5:29 PM

SMITTY514

MEMBER
1 POST

What about the fuel injectors. Could this be the problem?

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Thursday, October 15th, 2015 AT 8:26 AM

CJ MEDEVAC

MECHANIC
11,005 POSTS

THAT IS A POSSIBILITY

HOW 'BOUT THE CHECK ENGINE LIGHT ON AND SEEING IF YOU HAVE ANY CODES?

SCANNER CONNECTIONS ARE MOST LIKELY ON THE DRIVER'S SIDE FENDER, NEAR THE FIREWALL

CHECK THIS OUT, IT 'LL SHOW YOU HOW, ONCE THERE, SCROLL DOWN PAST THE ICONS

http://www.icheckengine.com/2012/05/ford-obd1-codes.html

WHICH SIDE OF THE U.S. ARE YOU ON?

DID YOU "SMACK" THE IAC OR ATTEMPT TO CLEAN IT? THIS IS A COMMON ITEM TO MESS UP AND EZ TO DO.

THE MEDIC

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Thursday, October 15th, 2015 AT 5:04 PM