Mechanics? Help Needed - 2006 Ford F-150 4.6L Idles Rough/Stumbles

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quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:

I did that and took 2 short videos of the screen with my phone, but I cannot upload them.

The MAF started in the high range at idle (5.11 with a 2-6 g/s range). As soon as I gave it gas, it shot through the roof, maxing out at 187 at WOT.

Did you try disconnecting the MAF and starting the engine to see if it runs?

I’ll try that now. Bandaging up my fingers. Leaned the back of my hand against EGR tube from exhaust when I was checking vac lines again and burned the backs of my fingers near hand. Stupid is as stupid does. LOL

RBeach
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Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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Gimp with
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quote:
Originally posted by Shifferbrains:
Did you try disconnecting the MAF and starting the engine to see if it runs?

Disconnected the MAF and started truck. Still running rough. The wrench icon, not the engine light, came on and got these codes.

P0102 - mass air flow A circuit low
P0113 - intake air temperature sensor 1 circuit high
P0402 - exhaust gas recirculating flow excessive detected

All are shown as pending.

RBeach
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What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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I am smelling exhaust inside the truck as I used to not be able to before truck was parked when I worked on rear end.

RBeach
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What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Did you try disconnecting the MAF and starting the engine to see if it runs?

Disconnected the MAF and started truck. Still running rough. The wrench icon, not the engine light, came on and got these codes.

P0102 - mass air flow A circuit low
P0113 - intake air temperature sensor 1 circuit high
P0402 - exhaust gas recirculating flow excessive detected

All are shown as pending.

Ok, I think this rules out MAF for the time being. The EGR code is new? Have you run the engine with the EGR vacuum lines disconnected?

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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Gimp with
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quote:
Originally posted by Shifferbrains:
Ok, I think this rules out MAF for the time being. The EGR code is new? Have you run the engine with the EGR vacuum lines disconnected?

I replaced the EGR valve with a BWD brand form Advance Auto about 2 hours ago.

RBeach
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What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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Shit, I should have thought about this before.

Hook everything back up, clear the engine codes, then clear the KAM. This is the Keep Alive Memory. Many times on Ford's clearing the codes alone will not fully get them to go away. Clearing the KAM is necessary.

You should be able to do this with the Maximus. Probably will be under Functional Tests or whatever nomenclature the Maximus uses.

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Ok, I think this rules out MAF for the time being. The EGR code is new? Have you run the engine with the EGR vacuum lines disconnected?

I replaced the EGR valve with a BWD brand form Advance Auto about 2 hours ago.

Did you make sure that there was no vacuum to the EGR valve at idle? That's why I asked if you ran the engine with the vacuum lines disconnected.

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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Gimp with
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posted

quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Ok, I think this rules out MAF for the time being. The EGR code is new? Have you run the engine with the EGR vacuum lines disconnected?

I replaced the EGR valve with a BWD brand form Advance Auto about 2 hours ago.

Cleared codes and did a KOER test:

P0402 - EGR flow excessive
P2196 - O2 rich B1S1
P2271 - O2 rich B1S2

RBeach
_________________________________
What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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Gimp with
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posted

quote:
Originally posted by Shifferbrains:
Shit, I should have thought about this before.

Hook everything back up, clear the engine codes, then clear the KAM. This is the Keep Alive Memory. Many times on Ford's clearing the codes alone will not fully get them to go away. Clearing the KAM is necessary.

You should be able to do this with the Maximus. Probably will be under Functional Tests or whatever nomenclature the Maximus uses.

I have cleared this several times hoping it would correct issue.

RBeach
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What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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egregore

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quote:
P0102 - mass air flow A circuit low
P0113 - intake air temperature sensor 1 circuit high
P0402 - exhaust gas recirculating flow excessive detected

Chafed, broken, melted (on exhaust or EGR tube) or chewed (by vermin) wire harness? Water intrusion in the PCM? Inspect these. If your scan tool has a data stream, watch for changes in the MAF and IAT voltages while shaking and wiggling the harness.

Posts: 28951 | Location: Johnson City, TN | Registered: April 28, 2012

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P0102 - mass air flow A circuit low
P0113 - intake air temperature sensor 1 circuit high
P0402 - exhaust gas recirculating flow excessive detected

Chafed, broken, melted (on exhaust or EGR tube) or chewed (by vermin) wire harness? Water intrusion in the PCM? Inspect these. If your scan tool has a data stream, watch for changes in the MAF and IAT voltages while shaking and wiggling the harness.

The P0102 and P0113 came about after running the engine with the MAF disconnected as I requested he do.

The P0402 seems to be new after he changed the EGR valve.

RBeach, Absolutely make sure all of the wiring is good.

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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Gimp with
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quote:
Originally posted by Shifferbrains:
Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

I pulled the vacuum lines off of the EGR while at isle on park, and it smoothed out. There is a vacuum being pulled on the lines.

Top line: approx 11
Bottom line: approx 17

RBeach
_________________________________
What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

I pulled the vacuum lines off of the EGR while at isle on park, and it smoothed out. There is a very slight vacuum being pulled on the lines.

Top line: approx 11
Bottom line: approx 17

Now we are getting somewhere. The EGR control valve is the next thing to check. Trace the vacuum lines back to the source. Your Ford might have one that has a vent filter. In an earlier post I tried to explain this. The filter gets clogged and allows unwanted vacuum at the EGR valve.

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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Gimp with
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Picture of RBeach

posted

quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

I pulled the vacuum lines off of the EGR while at isle on park, and it smoothed out. There is a very slight vacuum being pulled on the lines.

Top line: approx 11
Bottom line: approx 17

Now we are getting somewhere. The EGR control valve is the next thing to check.

I have 2 vac solenoids that I see. One is above brake booster and the other is on passenger side firewall behind battery.

RBeach
_________________________________
What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

I pulled the vacuum lines off of the EGR while at isle on park, and it smoothed out. There is a very slight vacuum being pulled on the lines.

Top line: approx 11
Bottom line: approx 17

Now we are getting somewhere. The EGR control valve is the next thing to check.

I have 2 vac solenoids that I see. One is above brake booster and the other is on passenger side firewall behind battery.

Do either or both look like they have a cap on top?

Posts: 5202 | Location: Manteca, CA | Registered: May 30, 2006

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The one that is listed as EGR solenoid on Rock Auto shows as a 4WD solenoid elsewhere.

RBeach
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What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

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Gimp with
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posted

quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

I pulled the vacuum lines off of the EGR while at isle on park, and it smoothed out. There is a very slight vacuum being pulled on the lines.

Top line: approx 11
Bottom line: approx 17

Now we are getting somewhere. The EGR control valve is the next thing to check.

I have 2 vac solenoids that I see. One is above brake booster and the other is on passenger side firewall behind battery.

The one above the brake booster, does it look like it has a cap on it?

Yes. And the bottom vac line has what looks like a green cap as well.

RBeach
_________________________________
What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

Ignored post by RBeach posted

Gimp with
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posted

quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
quote:
Originally posted by RBeach:
quote:
Originally posted by Shifferbrains:
Well, right now I would say that the new EGR is faulty, or there is vacuum to the EGR at idle.

I pulled the vacuum lines off of the EGR while at isle on park, and it smoothed out. There is a very slight vacuum being pulled on the lines.

Top line: approx 11
Bottom line: approx 17

Now we are getting somewhere. The EGR control valve is the next thing to check.

I have 2 vac solenoids that I see. One is above brake booster and the other is on passenger side firewall behind battery.

Do either or both look like they have a cap on top?

The one behind battery is small and goes to intake.

The one by brake booster is larger.

RBeach
_________________________________
What if there were no hypothetical questions? - George Carlin

Posts: 2104 | Location: Fort Mill, SC | Registered: June 12, 2005

Ignored post by RBeach posted