Question about 1990 Lexus LS 400

1 Answer

My exhaust pipes are glowing hot

I have just purchased a toyota celsior (ls400) 1990 i was driving a short distance and the car seemed to loose power as if it stoped firing on some
of the spark plugs then the exhaust pipes at the back of the engine just below the firewall began to over heat and glow red with heat somebody
told me there is an ignition coil that sometimes fall off the engine i would
like to know if anybody has had this problem and can they tell where this
coil is located and also will i need to replace mt catalytic converters

Posted by on

  • jack369 Jul 11, 2008

    thank you for your advise


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 321 Answers

The catalytic convertors are no good.They are severely restricting flow.Do not drive until repaired.The car could burn,or damage to the engine could result.

Posted on Jul 10, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Toyota voting front ex pipe getting too hot too quick note cat

which toyota engine
front exhaust manifold and pipes always get hot quick
even more quickly if have taken out the cat and bolted in cat delete pipe


Jun 08, 2016 | Toyota Cars & Trucks

1 Answer

I have 1998 ford expedtion runs rough pipes get red hot. took pipes loose. no power still. put new plugs no luck please help!

It takes a lot of heat to make the exhaust pipes get hot enough to glow red. It is a dangerous condition and can lead to a vehicle fire. A clogged catalytic converter or manifold could cause this, but ultimately the heat from the exhaust fumes is not exiting the system properly. Even a clogged tail pipe could cause this. A vandal might have stuck something in the end of the tail pipe.
It is running rough because it cannot push the exhaust out and therefore cannot take in enough air.
Regardless of the cause, have this inspected and the blockage/clog removed repaired and do not continue to drive the vehicle with this condition.

Dec 16, 2015 | Ford Cars & Trucks

1 Answer

Keeps loosing power

Check engine light on? maybe a p0420 code. Catalytic converters could be clogged up. One way to check is to put your hand close to the exhaust pipe at the rear of the car. Be careful, it can be very hot. If you can't put it close to the end with out burning. Replace the catalytic converters.

Oct 19, 2014 | Cars & Trucks

1 Answer

2002 olds bravada exauste manifold glowing red hot

The exhaust system could be blocked between the engine and the tail pipe. The fuel mixture could be too rich or too lean.
Is the check engine light on ?
Can you rev the engine up in park ?

Feb 01, 2013 | Oldsmobile Cutlass Supreme Cars & Trucks

1 Answer

Exhaust manifold and pipe glowing red hot hyundai accent 97

Exhaust Glowing Red Hot

Start over--you do not have the timing
belt on correctly

Dec 06, 2012 | 1997 Hyundai Accent

2 Answers

206 hdi looses power for second then is ok this only happens now and again

I also have a Peugeot 206 HDI and have had power drops on 2 occasions.
1st time caused by loose catalyst in exhaust... it was bouncing about so that it's honeycomb holes would align one minute, then drift out of line another minute.... sometimes really strangling power as it nearly blocked the exhaust..... I realised it was the catalyst after noticing it got really hot whilst the following exhaust remained cold as struggling up a hill.To check for this you can slacken the turbo to catalyst clamp so exhaust can escape .... and power should go back to full.(you can drive a short distance on open turbo without real problems... plus it quietens the exhaust reasonably enough)
2nd time was air getting into the diesel line ..... small bubbles would get sucked in whilst parked, due to fuel draining back to tank, and sucking on a loose fuel line joint on the squeezy priming bulb pipe.This caused short power dips initially but worsened over 6 weeks until the diesel filter would collect a pocket of air whilst parked.... causing it to completely stall a short while after starting..... Usually during acceleration, the fuel surge pulling the bubble through.
..... fixes .... 1st, I cut open and removed the catalyst, and re-welded casing shut (not needed in UK diesel test) and breathes better now :0) 2nd ..... done today, replaced bad pipe with high pressure fuel line and good pipe clamps. I've ordered a non return valve for the fuel line too (not that it needs it now) ..... to stop so much air getting in if it happens again, as I guess this is pretty bad for the high pressure pump, and a pain to replace if it goes ..... .... Beware of the very high fuel line pressures after the pump in running HDI engine.
The air mass sensor can be unplugged to test ... the engine will still run normally if no other problems.

Jul 19, 2012 | Cars & Trucks

1 Answer

2001 2.4L Gran Am with severe miss.

check compression of all cylinders.i'm afraid you have burnt valve[s].if compression #'s are all about the same,check ignition timing.

Sep 21, 2009 | 2001 Pontiac Grand Am SE

1 Answer

96' toyota corolla Exhaust Manifold Keeps Cracking

Sounds weird that this problem keep occurring over and over. Does it crack in the same spot every time?

Only two things I can think of that would cause this problem.
1. Extensive over heating, I've seen a exhaust manifold get glowing red hot because of a bad oxygen sensor.

2. Excessive Vibration. The whole exhaust line to the back of the car is moving around too much or too stiff. The exhaust line needs to move around enough to take the movement/vibration of the engine. I would check out for bad motor mounts and worn out exhaust pipe mounts.

May 17, 2009 | 1996 Toyota Corolla

Not finding what you are looking for?
1990 Lexus LS 400 Logo

419 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts


Level 3 Expert

70387 Answers


Level 3 Expert

624 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Are you a Lexus Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides