300 I6 sputter, jerking

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Feb 9, 2004 | 06:42 PM

galaxie64

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From: midwest

300 I6 sputter, jerking

CAN ANYONE HELP??? In my 1991 I6 300, F150, it will start and idle beautifully. When I ad power the engine starts to "gargle and " a little, but it's bad enough to cause an uncomfortable jerking. As soon as the rpm get above 2200, (like on the freeway), it runs smooth and powerful. NO "check engine" light or codes. The truck has all new plugs, wires, cap.

Feb 10, 2004 | 09:05 PM

downdeephuskyjerk

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From: GrandRapids MI

try pulling the vac line off of your egr valve once,you will get a check engine light but see if that helps

Feb 11, 2004 | 04:09 PM

blueovaldave

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Joined: Jan 2004

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From: Yukon, Oklahoma

I just took off my throttle body to clean it for the same reason and discovered that the gasket was half gone. I went ahead and cleaned the throttle body and installed a new gasket and it runs 100% better.

Feb 20, 2004 | 08:33 AM

PKRWUD

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Joined: Jan 2002

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From: Ventura, California

Those are two good suggestions. A third would be dirty injectors. I suspect it's your TB gasket, though.

Feb 21, 2004 | 06:36 PM

FATMANTPK

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Joined: Feb 2004

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Does this issue only occur when it is extremely hot outside? I had this problem with my 1994 F 150 with the I6, 300 motor. It only happened during the hottest days/months, and only after the engine was very warm.

Feb 21, 2004 | 08:36 PM

galaxie64

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From: midwest

Thank you all for the info. As soon as it gets warmer out, I will check and clean the TB. I will also check the egr valve.
Thank You
Martin.

Feb 24, 2004 | 08:59 AM

fordtruckfan90

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From: St.Paul, MN

hey guys i kinda have the same problem. I have an egr problem, code 31, EGR control valve sensor. I have a friend that works for ford, he asked mechanics, culd be the valve, the sensor or a buncha things, but i was cleaning out my tb totally, whish was very dirty, and my gasket was bad but put it back on cuz i didnt have a new one, i do have some hesitation at low rpms, hopefully this will solve it!

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Feb 24, 2004 | 11:57 AM

fordtruckfan90

Senior User

Joined: Jan 2004

Posts: 308

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From: St.Paul, MN

nothing, ran fuel inj cleaner, cleaned out throttle body, I.A.C sensor, checked vac. lines, they r good. I can get the valve and sensor from FORD for $165

Feb 24, 2004 | 02:43 PM

#10

PKRWUD

Senior User

Joined: Jan 2002

Posts: 112

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From: Ventura, California

Is your code KOEO, KOER, or Continuous?

Try this; disconnect the harness at the sensor, and stick a jumper in the harness connector between the brown/white wire and the brown/light green wire. Then run the KOEO test again. Look for a code 35 (ignore all other codes, just look for a code 35). If you get a code 35, then the sensor is bad, and needs to be replaced.