why would my exhaust manifold be glowing red hot?

jarmcdev
0

Asked by Jun 27, 2012 at 01:17 AM about the 2002 Ford Taurus SEL

Question type: Maintenance & Repair

22 Answers

aztec626bf
10,545

What type of driving are you doing? It takes a lot of heat to get manifolds glowing. Usually happens under very heavy loads for extended periods of time.

26 out of 26 people think this is helpful.
Tom Demyan
166,645

right, and or they might be clogged. Do you have drivability problems, such as the car not going over a certain RPM or speed?

43 out of 43 people think this is helpful.
aztec626bf
10,545

Never heard of clogged manifold........explain

24 out of 24 people think this is helpful.
gustang
895

Could be a clogged catalytic converter.

9 out of 9 people think this is helpful.
MrBlueOval
4,735

Sounds like a clogged up catalytic converter to me. Manifolds do get hot to touch but not normal to glow unless the exhaust from the engine isn't leaving thru the exhaust pipes fast enough. Converters can clogg up to the point of the car either not running at all or running very rough. If that manifold is glowing, it's probably at 900-1000 degrees and it's too hot to drive and could cause a fire and burn up your car and possibly with you in it. Call an exhaust repair place like Meinke or MIdas or Car-X and see if they think you can drive it in or should you have it towed. If one is very close by by only a few blocks then it should be OK to drive it when the engine is cooled down from the night before but not if it's farther away or the engine is already warm or hot. I myself would just have it towed in just to be safe. You don't want to be in a car that catches fire. It can explode with you in it very quickly if that manifold is glowing. Call the exhaust repair shop and make an appointment, but call a towtruck first, that's what they are there for. to move your car safely. Good luck, Kenny.

13 out of 13 people think this is helpful.
Fernando Corona
175

its simple its clogged up change your manifold end of problem.

15 out of 15 people think this is helpful.
aztec626bf
10,545

It most likely does this only while cruising under high loads? A clogged up exhaust manifold will not glow red hot. It is basically the same as starving your engine of air. You will produce less power therefore less heat. It would be like putting a lawn mower engine carb on a V8 engine.......no power ,......no heat. Even at "wot" you would not generate enough heat. You would have lots of fuel and no air for the mixture all that fuel would cool down the mixture and the combustion. If somehow you have late ignition timing that would cause this scenario.

13 out of 13 people think this is helpful.
Texidor
530

In a 2002 Toyota Sienna i change the spark plugs after a 30 minute drive it stared shaking a it was night by that time we know it, that the manifold was red hot i disconnected the catalytic converter and still got red hot i don't k now what can it be; how do i check if is late ignition timing or if is something more.

52 out of 52 people think this is helpful.
ron1969
170

i got a 1992 chevy truck 350 tbi ehaust glowing red changed o2 sensor and checked exhaust its not clogged up any idea

17 out of 17 people think this is helpful.
dabassmechanic
20

I have to agree with both points Clogged cat Plus an additional reason they got clogged, to much fuel aka Rich, if it's Immediate running rough it's not the O2's they don't turn on till operating temp and since headers and manifolds rarely ever clog loosen your pre cat bolts spread the pipe 1/4 inch or so and see if there is an improvement besides sounding like a drag car =Þ if yes then it's clogged if no move on to pertinent sensors with a digital volt meter you can test most The big ones are TPS, MAF, Primary Temp sending unit on top of the motor next to the fuel rail usually brass. those are the easy checks, rent a fuel pressure gauge at auto zone or such costs nothing since you get your money back when you return it, free is always good

2 out of 2 people think this is helpful.
Christine Pence
200

Why would a 87 chevy 350 manfold glow

20 out of 20 people think this is helpful.
MrBlueOval
4,735

Christine, read me post above that I answered 2 years ago. That should answer your question. Kenny/MrBlueOval

7 out of 7 people think this is helpful.
Wolford
50

Got 98 Chevy 4x4 truck with a vortex 350. The truck has no cat and I have changed the fuel pump destritbur and spider both manifolds get glowing red what can cause this?

5 out of 5 people think this is helpful.
Takalani
40

Timing is out

3 out of 3 people think this is helpful.
Mustangguy95
50

I have a 95 mustang gt 5.0 with a 600 carb 4bbl my manifold was cherry red this morning wen i started da car but it was idling high usually it would drop dwn but it didnt .. N abmin later it back fired on me sum1 help me out

3 out of 3 people think this is helpful.
Takalani
40

That can happen if you exhaust valves seat is not closing properly.2 or if you auto choke is not working properly and forcing to much petrol into the combustion chamber,

1 out of 1 people think this is helpful.
Mustangguy95
50

I have a 95 mustang gt 5.0 with a 600 carb 4bbl my manifold was cherry red this morning wen i started da car but it was idling high usually it would drop dwn but it didnt .. N abmin later it back fired on me sum1 help me out

2 out of 2 people think this is helpful.
Mustangguy95
50

Might b my choke messing up im thinking first time it done that

lelcamaro
20

Just recently bought 84 corvette exhaust was glowing red there were two previous attempts to do a tune up first person's attempt had the spark plug wires wrong second persons attempt got the spark plug wires in the right order but has the distributor set one terminal out from where it should be that doesn't really make a difference as long as the rotor matches the terminal where the problem came in is that it wasn't in true time once putting it in true time and relearning the computer in clearing the set code did the trick no more glowing exhaust so if you did any kind of tune up that may be your issue rather than a clogged converter or manifolds

2 out of 2 people think this is helpful.
lelcamaro
20

More info when setting the timing you need to unplug the EST electronic spark timing and set the timing then as a base time then turn the car off after tightening the distributor and disconnect the negative battery cable for 30 seconds or a little longer and while waiting the 30 seconds plug the EST back in then after the 30 seconds plug that is negative battery terminal back in and the computer will relearn and it will reset your idle

lelcamaro
20

And for those with 350 engines that want total advance time follow the procedure above set your bass time then bring the car up to 2500 to 3000 rpms then reset your timing 234 to 36 degrees advanced and that should be total advanced time hope this helps some of you

mandasue
20

I've got a 95 jeep Cherokee sport just put all new exhaust on and the cat is glowing red and it blew a hole in the new muffler after 3 weeks

2 out of 2 people think this is helpful.

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