79 mark v stumble/ dieseling
Moderator: Dan Szwarc
Re: 79 mark v stumble/ dieseling
Egr is not working, I have a new valve coming
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Re: 79 mark v stumble/ dieseling
If it is leaking, those are classic symptoms for EGR that is open or partially open during lower engine RPMs.
Action
Action
Phoenix - Yeah, it's hot, however it's a dry heat
2006 Lincoln Navigator Limited 5.4l 3V
1996 Lincoln Mark VIII 2DR Coupe Diamond Anniversary 4.6l DOHC, 4R70W, 3.07
1970 Continental Mark III Triple Black 460 4v, C6, 2.80 (Used for Woodward Dream Cruise or just generally stored in Michigan)
1966 Lincoln Continental 4DR Convertible 462 4v, C6, 3.00
1966 Mercury Park Lane 4DR Breezeway 410 4v, C6, 2.80
2006 Lincoln Navigator Limited 5.4l 3V
1996 Lincoln Mark VIII 2DR Coupe Diamond Anniversary 4.6l DOHC, 4R70W, 3.07
1970 Continental Mark III Triple Black 460 4v, C6, 2.80 (Used for Woodward Dream Cruise or just generally stored in Michigan)
1966 Lincoln Continental 4DR Convertible 462 4v, C6, 3.00
1966 Mercury Park Lane 4DR Breezeway 410 4v, C6, 2.80
Re: 79 mark v stumble/ dieseling
I took the canister off and it seemed to be pushed against the housing, however, it did appear to have carbon build up on both sides, so I might wait for the new one to arrive before trying to tune around the surging and just focus on the hesitation for now. I turned the idles out another 1/2 turn. So if the hesitation is still there, I’ll change the pump stroke
Re: 79 mark v stumble/ dieseling
Re: 79 mark v stumble/ dieseling
Still waiting on Egr valve, but did some playing around with choke and fast idle. Starts right up with one pump and idles at 1200 rpm ( not sure if this is correct) and very smooth.
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Re: 79 mark v stumble/ dieseling
The idle may be a bit high.
There should be an orange or white sticker on the valve cover with that data and what needs to be on when setting curb idle speed.
And it sounds like you are getting it dialed in. Or maybe the mouser is doing the hard lifting.
Action
There should be an orange or white sticker on the valve cover with that data and what needs to be on when setting curb idle speed.
And it sounds like you are getting it dialed in. Or maybe the mouser is doing the hard lifting.
Action
Phoenix - Yeah, it's hot, however it's a dry heat
2006 Lincoln Navigator Limited 5.4l 3V
1996 Lincoln Mark VIII 2DR Coupe Diamond Anniversary 4.6l DOHC, 4R70W, 3.07
1970 Continental Mark III Triple Black 460 4v, C6, 2.80 (Used for Woodward Dream Cruise or just generally stored in Michigan)
1966 Lincoln Continental 4DR Convertible 462 4v, C6, 3.00
1966 Mercury Park Lane 4DR Breezeway 410 4v, C6, 2.80
2006 Lincoln Navigator Limited 5.4l 3V
1996 Lincoln Mark VIII 2DR Coupe Diamond Anniversary 4.6l DOHC, 4R70W, 3.07
1970 Continental Mark III Triple Black 460 4v, C6, 2.80 (Used for Woodward Dream Cruise or just generally stored in Michigan)
1966 Lincoln Continental 4DR Convertible 462 4v, C6, 3.00
1966 Mercury Park Lane 4DR Breezeway 410 4v, C6, 2.80
Re: 79 mark v stumble/ dieseling
Definitely the mouser.
I adjusted the pump stroke to the last hole available, because it still has a slight annoying stumble, dieseling is gone atm
I adjusted the pump stroke to the last hole available, because it still has a slight annoying stumble, dieseling is gone atm
Re: 79 mark v stumble/ dieseling
Well, hesitation is gone 
Action was on top of it from the very beginning! Thank you for muddling through with me!
I’m still gonna replace egr and fiddle with fast idle (spec. Is 2200rpm)
But at least now I know it’s possible to run ok, and that’s what’s always hung me up on this car, suspicion that it’s trash.
Action was on top of it from the very beginning! Thank you for muddling through with me!
I’m still gonna replace egr and fiddle with fast idle (spec. Is 2200rpm)
But at least now I know it’s possible to run ok, and that’s what’s always hung me up on this car, suspicion that it’s trash.
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Re: 79 mark v stumble/ dieseling
So the cat is purring now!
Action
Action
Phoenix - Yeah, it's hot, however it's a dry heat
2006 Lincoln Navigator Limited 5.4l 3V
1996 Lincoln Mark VIII 2DR Coupe Diamond Anniversary 4.6l DOHC, 4R70W, 3.07
1970 Continental Mark III Triple Black 460 4v, C6, 2.80 (Used for Woodward Dream Cruise or just generally stored in Michigan)
1966 Lincoln Continental 4DR Convertible 462 4v, C6, 3.00
1966 Mercury Park Lane 4DR Breezeway 410 4v, C6, 2.80
2006 Lincoln Navigator Limited 5.4l 3V
1996 Lincoln Mark VIII 2DR Coupe Diamond Anniversary 4.6l DOHC, 4R70W, 3.07
1970 Continental Mark III Triple Black 460 4v, C6, 2.80 (Used for Woodward Dream Cruise or just generally stored in Michigan)
1966 Lincoln Continental 4DR Convertible 462 4v, C6, 3.00
1966 Mercury Park Lane 4DR Breezeway 410 4v, C6, 2.80
Re: 79 mark v stumble/ dieseling
Yes sir! Not bad at all for just an old 400 with a 2 barrel.
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