86 F150 5.0 running poorly

[sdhorton]

Well a 1991 is a much improved system from a 1986. Are you saying that an 06 French truck reminds you of a 1986 Ford? Ok, 1991 I think if you can find someone with a fair scan tool it may be able to read live data when running. Two of the major changes in addition to pin changes on the EEC are a speed input and a single duty cycle EGR control valve. You had me concerned when you posted a 3 digit code, 1986 only had 2 digit codes. 1990-up have a fuel pump module so no extra frame mounted pump.That TPS does not need to be right at 1 volt, the EEC will read the value when cranking and set that as idle/closed throttle.Shane, maybe these will help, they are from my AllData

Well hell, I took someone elses word on the name of that component, it is not a thermactor it is the EGR vacuum regulator

 

 

 

From: 85lebaront2 [via Bullnose Enthusiasts] <redacted_email_address>

Sent: Monday, April 6, 2020 3:50 PM

To: sdhorton <redacted_email_address>

Subject: Re: 86 F150 5.0 running poorly

 

 

 

Well a 1991 is a much improved system from a 1986. Are you saying that an 06 French truck reminds you of a 1986 Ford? Ok, 1991 I think if you can find someone with a fair scan tool it may be able to read live data when running. Two of the major changes in addition to pin changes on the EEC are a speed input and a single duty cycle EGR control valve. You had me concerned when you posted a 3 digit code, 1986 only had 2 digit codes. 1990-up have a fuel pump module so no extra frame mounted pump.

 

That TPS does not need to be right at 1 volt, the EEC will read the value when cranking and set that as idle/closed throttle.

 

Shane, maybe these will help, they are from my AllData

 

Bill Profile

 

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F-350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 1994 Taurus LX Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

 

 

 

 

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[85lebaront2]

The thermactor is the air pump. EGR system I believe will only open after a certain speed is reached. The EGR and thermactor solenoid valves are all powered by the red wire that powers the injectors the brown/pink wire goes to pin #33 on the EEC after first passing through C101 which should be a round 8 pin (not all may be used) plug on the left inner fender. If it is working at all you should be able to feel it "hum" as it is a duty cycle valve which pulses.