Stinky exhaust
Thread Starter
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Mountain Pass
Joined: Feb 2018
Posts: 192
Likes: 1
From: DEWINTON Alberta
Stinky exhaust
Truck is an 88 f150 5.0 fi manual.
new crate motor
starts, idles, and runs well but the exhaust is super stinky.
Is this classified as "running rich"
I have set timing a few times around 12-13 deg but doesn't seem to affect smell.
drove around for 20 min yesterday and had a pretty good headache after, it's that strong.
Plugs, wires all new. Dist is not new. Exhaust is new.
Anything you guys would direct me towards to check out to reduce the exhaust stench.
tyvm
new crate motor
starts, idles, and runs well but the exhaust is super stinky.
Is this classified as "running rich"
I have set timing a few times around 12-13 deg but doesn't seem to affect smell.
drove around for 20 min yesterday and had a pretty good headache after, it's that strong.
Plugs, wires all new. Dist is not new. Exhaust is new.
Anything you guys would direct me towards to check out to reduce the exhaust stench.
tyvm
Thread Starter
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Mountain Pass
Joined: Feb 2018
Posts: 192
Likes: 1
From: DEWINTON Alberta
Motor was installed by previous owner as project he never completed.
Was told it was a "crate" motor so I would guess old parts were reused.
i wish I had more experience with this motor to tell if it is actually running well.
starts and idles excellent but I cannot vouch for how snappy it is upon acceleration, I would say there is some hesitation when you step on the gas.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
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From: Kentucky
Lead Driver
Joined: Oct 2016
Posts: 6,185
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From: Houston/Sugar Land
One thing you can do is redo the timing the way you did it. When you set it to 10*TDC WITH the possible spout out, turn key off and plug the spout back in. Recheck the timing and if it is advanced from where you set it, it is working. The stinking could be a bad O2 sensor making the motor run rich. Sandy
Thread Starter
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Mountain Pass
Joined: Feb 2018
Posts: 192
Likes: 1
From: DEWINTON Alberta
The fuel pressure reg appears used.
i cannot locate the o2 sensor? This truck has headers on it. I've looked up and down entire exhaust , checked all around where starter is and can't find.
i have noticed that there is a black tube about 3/4" diameter on passenger side above where headers mount in that is completely disconnected both ends. Something that was in use prior to hreders being installed?
Sandy I will reset timing as you've suggested and report.
How do you know when you've set timing perfect?
I struggled getting it right at degree I wanted, cap seems pretty wobbly and a bit of a challange tightening bolt down, staying away from running fan and keeping timing right where you want it.
i cannot locate the o2 sensor? This truck has headers on it. I've looked up and down entire exhaust , checked all around where starter is and can't find.
i have noticed that there is a black tube about 3/4" diameter on passenger side above where headers mount in that is completely disconnected both ends. Something that was in use prior to hreders being installed?
Sandy I will reset timing as you've suggested and report.
How do you know when you've set timing perfect?
I struggled getting it right at degree I wanted, cap seems pretty wobbly and a bit of a challange tightening bolt down, staying away from running fan and keeping timing right where you want it.
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Lead Driver
Joined: Oct 2016
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From: Houston/Sugar Land
The fuel pressure reg appears used.
i cannot locate the o2 sensor? This truck has headers on it. I've looked up and down entire exhaust , checked all around where starter is and can't find.
i have noticed that there is a black tube about 3/4" diameter on passenger side above where headers mount in that is completely disconnected both ends. Something that was in use prior to hreders being installed?
Sandy I will reset timing as you've suggested and report.
How do you know when you've set timing perfect?
I struggled getting it right at degree I wanted, cap seems pretty wobbly and a bit of a challange tightening bolt down, staying away from running fan and keeping timing right where you want it.
i cannot locate the o2 sensor? This truck has headers on it. I've looked up and down entire exhaust , checked all around where starter is and can't find.
i have noticed that there is a black tube about 3/4" diameter on passenger side above where headers mount in that is completely disconnected both ends. Something that was in use prior to hreders being installed?
Sandy I will reset timing as you've suggested and report.
How do you know when you've set timing perfect?
I struggled getting it right at degree I wanted, cap seems pretty wobbly and a bit of a challange tightening bolt down, staying away from running fan and keeping timing right where you want it.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
X2....without an O2 sensor the computer tends to fallback to pig rich mode. No amount of base timing fiddling will fix that.
5th Wheeling
Joined: Apr 2018
Posts: 47
Likes: 8
[QUOTE=Broncor;18178774]
i have noticed that there is a black tube about 3/4" diameter on passenger side above where headers mount in that is completely disconnected both ends. Something that was in use prior to hreders being installed?
That is what the problem with my truck was, That is the air injector for the cat. conv. You probably don't have one anymore. . I bet the PO plugged the ports, if it's not exhausting out the back of the heads.
This is what the air pump feeds and two of the solenoids hooked to the vacuum lines controls. The "THERMACTOR" system. If you don't have a cat, the system is not needed. Of you have a cat or want to pass a smog test you need all this.
Your #1 priority seems to be the o2 sensor, it will never run right without it.
i have noticed that there is a black tube about 3/4" diameter on passenger side above where headers mount in that is completely disconnected both ends. Something that was in use prior to hreders being installed?
That is what the problem with my truck was, That is the air injector for the cat. conv. You probably don't have one anymore. . I bet the PO plugged the ports, if it's not exhausting out the back of the heads.
This is what the air pump feeds and two of the solenoids hooked to the vacuum lines controls. The "THERMACTOR" system. If you don't have a cat, the system is not needed. Of you have a cat or want to pass a smog test you need all this.
Your #1 priority seems to be the o2 sensor, it will never run right without it.
Thread Starter
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Mountain Pass
Joined: Feb 2018
Posts: 192
Likes: 1
From: DEWINTON Alberta
#1 - I don't have in front of me but I remember timing needed to be between 11-13 deg.
im at about 12, the stinky ars exhaust led me to believe my timing still wasn't right and was rich.
my question is when do you know your set perfect.
#2 would you folks think that because there are hooker headers on this rig then the O2 sensor isn't there?
i had pretty good crawl around and absolutely could not locate.
#3 Stan , by bung are you saying weld in threads for the sensor to thread into?
ill need to find some literature giving how and where to hook up.
#4 for sure you guys feel that no sensor...your gonna be too rich?
thanks for help everyone
im at about 12, the stinky ars exhaust led me to believe my timing still wasn't right and was rich.
my question is when do you know your set perfect.
#2 would you folks think that because there are hooker headers on this rig then the O2 sensor isn't there?
i had pretty good crawl around and absolutely could not locate.
#3 Stan , by bung are you saying weld in threads for the sensor to thread into?
ill need to find some literature giving how and where to hook up.
#4 for sure you guys feel that no sensor...your gonna be too rich?
thanks for help everyone
5th Wheeling
Joined: Apr 2018
Posts: 47
Likes: 8
I am pretty sure that you would find the sensor if it was there. they are kinda obvious. What is after the headers? Maybe The Previous Owner was going to put it on the pipe. I think that Fords need a crossover between banks, but am not sure. http://amzn.to/2wKoPHq This is a bung, you can weld it on the pipe after the headers I believe. but not too far back They need to be hot. I believe your timing with "spout" removed is 10 degrees. Then replace spout and it is computer controlled.
You will be too rich without a sensor, it is in limp mode, does not know what you need, so goes rich.
I hope the wires are still there, on mine , the clip is on the passenger side.
You will be too rich without a sensor, it is in limp mode, does not know what you need, so goes rich.
I hope the wires are still there, on mine , the clip is on the passenger side.