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  #1  
Old 11-10-2010, 07:29 PM
merkchop merkchop is offline
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Default Glowing header, running rough, need help??

My sons 1994 Ranger 3.0 is running rough, seems to be stalling (was this way when I bought it for him a few weeks ago---was not running at all at that time).
I have replaced the MAF (now it will run at least), fuel filter, spark plugs and wires. It had several exhaust leaks. I have most of them fixed now, but it does still have a small one from somewhere.
Now to the exhaust...I let him drive it for a few miles tonight and when I stopped to give it a look over I found that the exhaust header on the passenger side was glowing red. The driver side looked fine.
It really seems to me that it has blockage or is starving for fuel or air the way it runs, but I am taking it that the exhaust issue is either from blockage or burning too hot, but only on half the engine??
Any ideas on what may be causing mine/his problems?
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Old 11-10-2010, 07:32 PM
ObsoleteE ObsoleteE is offline
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Default Re: Glowing header, running rough, need help??

Catalytic converter would be my guess.
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  #3  
Old 11-10-2010, 07:38 PM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Glowing header, running rough, need help??

Quote:
Originally Posted by merkchop View Post
My sons 1994 Ranger 3.0 is running rough, seems to be stalling (was this way when I bought it for him a few weeks ago---was not running at all at that time).
I have replaced the MAF (now it will run at least), fuel filter, spark plugs and wires. It had several exhaust leaks. I have most of them fixed now, but it does still have a small one from somewhere.
Now to the exhaust...I let him drive it for a few miles tonight and when I stopped to give it a look over I found that the exhaust header on the passenger side was glowing red. The driver side looked fine.
It really seems to me that it has blockage or is starving for fuel or air the way it runs, but I am taking it that the exhaust issue is either from blockage or burning too hot, but only on half the engine??
Any ideas on what may be causing mine/his problems?
sounds to me like the catalytic converter might be plugged up. the only time ive ever seen a manifold get red hot was from a blockage in the exhaust system and a plugged converter can do just that. if left like that for too long it can burn up valves and cause other damage as well. most likely the converter was damaged by contamination from raw unburned fuel which can be caused by a miss fire which it sounds like you had/ have. when the truck is running does the exhaust smell funny, kind of like rotten eggs?
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Old 11-10-2010, 09:26 PM
terryduanemiller terryduanemiller is offline
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Default Re: Glowing header, running rough, need help??

cat wld be my guess, as previously stated... running lean can cause the header/manifold to get red aswell
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  #5  
Old 11-10-2010, 09:35 PM
merkchop merkchop is offline
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Default Re: Glowing header, running rough, need help??

No funny smell from the exhaust, doesn't even smell like it is running rich.
I thought the cat. was stopped up when I first got the truck and I disconnected it and there was no difference in the way it ran, so I hooked it back up. Never looked at it in the dark to notice the red glow until tonight and I only had the cat. unhooked for a few minutes of run time anyway.
I guess I will try eliminating the cat. from the system (temporarily) to see what happens.
Other thing is that only the passenger side was getting that hot. The driver side which has the EGR tube from the exhaust did not and earlier I had the EGR vacuum line disconnected and the truck seemed to run a little better.
If I could only remember half of what I used to know about these engines then I would be doing great, but for now I am trying little things here and there as I remember them, so any and all suggestions will be appreciated.
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Old 11-21-2010, 08:16 PM
merkchop merkchop is offline
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Default Re: Glowing header, running rough, need help??

Haven't really had any time to do anything to the truck until yesterday.
I figured that I would eliminate the Cat. possibility. It had a stud broken on the flange (one of the exhaust leaks) so I needed to pull it to fix anyway. While it was out, I gutted it (don't have emissions here), so now it is free flow.
Doesn't run any better and the manifold is still getting "glowing red" hot after a few miles.

So new MAF, IAT, plugs, wires, distributor cap, rotor button, gutted cat. and it still bogs down and the manifold gets red hot. Now thinking that it is getting way too much gas and perhaps trying to flood out??

Any other ideas?
Thanks for any and all help.
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  #7  
Old 11-22-2010, 12:52 AM
Cooter83 Cooter83 is offline
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Default Re: Glowing header, running rough, need help??

Sounds like something is wrong with the head on that side. Might want to take off the vale cover and test your adjustments. Since it's only the passenger side. Check the valve tension, rockers for loose play, push rods for stoppage. If a pushrods is stopped up, it won't allow oil to pass through into the head for lube, causing overheating. Does the temp of the engine rise too or just exhaust manifold?
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Old 11-22-2010, 11:07 AM
merkchop merkchop is offline
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Default Re: Glowing header, running rough, need help??

Engine temp. stays good.
One other thing that I noticed and forgot to post last time I had messed with it (before gutting the exhaust), I unhooked the sensor to the EGR and it ran better, not perfect, but was not bogging down as bad. Of course this made the "check engine" light come on and I am sure it threw other things off, but it did better for the few miles I ran it like that.
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  #9  
Old 11-22-2010, 02:38 PM
Cooter83 Cooter83 is offline
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Default Re: Glowing header, running rough, need help??

I'm still certain your problem is within the head. I don't see the EGR having that kind of effect on the header. However, if your engine ran better with the EGR disconnected, you may have a clogged or broken vacuum line somewhere. But still test the rocker arms and pushrods.
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  #10  
Old 11-22-2010, 05:02 PM
merkchop merkchop is offline
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Default Re: Glowing header, running rough, need help??

Will try those things out and post an update whenever I get time to get back to it.
Thanks for any and all help.
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  #11  
Old 11-22-2010, 05:25 PM
littleblue littleblue is offline
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Default Re: Glowing header, running rough, need help??

Just a suggestion, try dropping the exhaust pipe from the exhaust manifold and run if for a few minutes and see if it turns red. It will eliminate the possibility of a restriction in the exhaust system and narrow your search to the head.
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  #12  
Old 11-23-2010, 04:19 AM
Lonncarr Lonncarr is offline
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Default Re: Glowing header, running rough, need help??

Mine did the same thing and it did turn out to be the Catalytic Converter.
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  #13  
Old 11-23-2010, 03:32 PM
merkchop merkchop is offline
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Default Re: Glowing header, running rough, need help??

Hopefully I will get time over the next day or so to mess with it a little more. Next thing I am going to do is unhook the exhaust from behind the cat. I know the cat. is not plugged as all that is left to it is the outer shell--basically just a large straight pipe right now.

My other thought is that it may be dumping way too much gas (would explain the rough running if it was flooding and the last drive attempt, if you pressed the gas hard it ran fine besides the glowing). Any thoughts on what may be causing that if it does play a part.
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  #14  
Old 11-30-2010, 05:02 PM
merkchop merkchop is offline
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Default Re: Glowing header, running rough, need help??

Had a couple of hours to fool with it the other day, so wanted to update.
I unhooked the pipe from behind the gutted cat. and drove it for a couple of miles (normally would have the manifold glowing lightly by this point. Did not see any hint of glow at all. That was all the time I had that night.
Next day I went ahead and hooked it back up, replacd the exhaust manifold gaskets and EGR gasket. This eliminated all leaks, that was all the time for then.
I had someone take it to the muffler shop yesterday and have a new cat. and muffler installed. The shop said that there was some pieces of the old cat. in the muffler (so hopefully that was the blockage).
Weather was bad last night and I did not get out of work until late, but I went to my moms house (where the truck was left at) and drove it up the road. It was bogging real bad (acted like it was flooding out) so once again I unhooked the EGR and it ran the best it has so far, not great but a lot better. Did not see any signs of glowing manifold, but I only took it for a few miles as it was late, dark, pouring down rain, and it really needs wiper blades I found out real quick.
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  #15  
Old 01-22-2012, 02:12 PM
catfishherren catfishherren is offline
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Default Re: Glowing header, running rough, need help??

i have the same problem bro i have unhooked mine from behind the cat and it still glows i think all my vac lines are hooked up ... i did try to take the header off but i turned 2 bolts and they both snapped so i stopped it also burns a lot of gas i think the timing is off i have tried everything but the muffler shop and testing the timing i think tomorrow i am going to try to have them both done wish me luck and ill let you know whats going on
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