No power. Clogged catalytic converter? ..Very long post with details..
#1
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
No power. Clogged catalytic converter? ..Very long post with details..
I have been having an issue with power loss.
1994 4Runner 3.0 5spd
2nd block, 3rd set of HG on this block
I installed rebuild heads (last set had a burned exhaust valve, and got very bad gas mileage). Installed a new timing belt, all other gaskets, installed header wrap on the crossover pipe.
When everything was finished started right up but died and something was dripping from the intake and exhaust pipe.
I pulled the intake and there was fuel in it and it had filled the entire lower half of the tube, it was also dripping out of the tailpipe. I installed the return line on the wrong vac line. Fixed that.
Then I was able to test drive it. It was very slow. I checked the valve timing and it was way off. reinstalled the belt and spun it around two times and it was fine. Then again took it out and the same thing. no power.
Again took of the belt and inspected the tensioner, it was bad. replaced that. After install the valve timing is on and not a factor.
took it for a drive, better but now it takes forever to reach hwy speed, and after a 10 minute drive the cat was GLOWING RED. I pulled the catalytic converter and with a very bright flashlight on the other side I can only see a very small spec of light.
I tested the TPS and it is in spec...
Tonight I am going to try and drive it with out the front o2 hooked up and see if it changes it.
sorry for the long post but I wanted to include everything to try and get this solved.
Thanks
1994 4Runner 3.0 5spd
2nd block, 3rd set of HG on this block
I installed rebuild heads (last set had a burned exhaust valve, and got very bad gas mileage). Installed a new timing belt, all other gaskets, installed header wrap on the crossover pipe.
When everything was finished started right up but died and something was dripping from the intake and exhaust pipe.
I pulled the intake and there was fuel in it and it had filled the entire lower half of the tube, it was also dripping out of the tailpipe. I installed the return line on the wrong vac line. Fixed that.
Then I was able to test drive it. It was very slow. I checked the valve timing and it was way off. reinstalled the belt and spun it around two times and it was fine. Then again took it out and the same thing. no power.
Again took of the belt and inspected the tensioner, it was bad. replaced that. After install the valve timing is on and not a factor.
took it for a drive, better but now it takes forever to reach hwy speed, and after a 10 minute drive the cat was GLOWING RED. I pulled the catalytic converter and with a very bright flashlight on the other side I can only see a very small spec of light.
I tested the TPS and it is in spec...
Tonight I am going to try and drive it with out the front o2 hooked up and see if it changes it.
sorry for the long post but I wanted to include everything to try and get this solved.
Thanks
Last edited by 85_yota; 07-12-2010 at 01:42 PM.
#5
Contributing Member
Join Date: Jul 2003
Location: Orlando, FL
Posts: 9,076
Likes: 0
Received 0 Likes
on
0 Posts
Biggest bummer for you is that you're in Cali so you are going to need to come up with a permanent solution, but you can get a cheap Carsound/Magnaflow cat on eBay for $60.
Fink
Fink
#7
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
update
last night I punched a few holes in the cat to see if it would change it. It changed a little. I then unplugged the front o2 sensor, and it got a little better. next was the cold start injector, after that was unplugged this little v6 woke up and ran great!!!
The reason we unplugged the cold start injector is when I pulled over to see if the cat was glowing, the manifolds were cherry red. So I think the injector was leaking causing the flooding like symptoms.
So this morning I bashed out the rest of the crap inside the cat, fixed the broken exhaust bolt and we will see how she drives to work.
Thanks guys for the input!!
last night I punched a few holes in the cat to see if it would change it. It changed a little. I then unplugged the front o2 sensor, and it got a little better. next was the cold start injector, after that was unplugged this little v6 woke up and ran great!!!
The reason we unplugged the cold start injector is when I pulled over to see if the cat was glowing, the manifolds were cherry red. So I think the injector was leaking causing the flooding like symptoms.
So this morning I bashed out the rest of the crap inside the cat, fixed the broken exhaust bolt and we will see how she drives to work.
Thanks guys for the input!!
Trending Topics
#8
Contributing Member
Join Date: Jul 2003
Location: Orlando, FL
Posts: 9,076
Likes: 0
Received 0 Likes
on
0 Posts
update
last night I punched a few holes in the cat to see if it would change it. It changed a little. I then unplugged the front o2 sensor, and it got a little better. next was the cold start injector, after that was unplugged this little v6 woke up and ran great!!!
The reason we unplugged the cold start injector is when I pulled over to see if the cat was glowing, the manifolds were cherry red. So I think the injector was leaking causing the flooding like symptoms.
So this morning I bashed out the rest of the crap inside the cat, fixed the broken exhaust bolt and we will see how she drives to work.
Thanks guys for the input!!
last night I punched a few holes in the cat to see if it would change it. It changed a little. I then unplugged the front o2 sensor, and it got a little better. next was the cold start injector, after that was unplugged this little v6 woke up and ran great!!!
The reason we unplugged the cold start injector is when I pulled over to see if the cat was glowing, the manifolds were cherry red. So I think the injector was leaking causing the flooding like symptoms.
So this morning I bashed out the rest of the crap inside the cat, fixed the broken exhaust bolt and we will see how she drives to work.
Thanks guys for the input!!
Let us know.
Fink
#10
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Its better, but not much. Before I left to go home I plugged the front o2 back in and it made no change.....
It is very strange sometimes it runs very strong with a quick throttle response and will get out of its own way in a hurry. Then there are other times in the same drive with no changes it runs like crap and boggs out with no power and damn scary to try and get on the freeway.
I kinda have a gut feeling it might be the TPS? no idea at this point. I guess I could recheck the valve timing for the 8th time.
Any ideas?
Last night I put some holes thru the mesh/honeycomb on the inside to clear the blockage. This morning I just finished the job... yes it sounds like crap. A new cat is coming very soon.
It is very strange sometimes it runs very strong with a quick throttle response and will get out of its own way in a hurry. Then there are other times in the same drive with no changes it runs like crap and boggs out with no power and damn scary to try and get on the freeway.
I kinda have a gut feeling it might be the TPS? no idea at this point. I guess I could recheck the valve timing for the 8th time.
Any ideas?
Last night I put some holes thru the mesh/honeycomb on the inside to clear the blockage. This morning I just finished the job... yes it sounds like crap. A new cat is coming very soon.
#12
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
#13
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Another update.
A few times yesterday it was having problems getting up to like 25-30mph taking a long time to get up to speed.
on the way home it was not as bad but when I parked the headers were glowing red.
I took off the black cover to the MAF and watched the needle while revving it making sure it worked. i turned the truck off and turned the key to the on position and turned the needle by hand.
With the key on and the truck not running are the injectors supposed to squirt when turning the MAF needle????
Thanks for the help guys!
A few times yesterday it was having problems getting up to like 25-30mph taking a long time to get up to speed.
on the way home it was not as bad but when I parked the headers were glowing red.
I took off the black cover to the MAF and watched the needle while revving it making sure it worked. i turned the truck off and turned the key to the on position and turned the needle by hand.
With the key on and the truck not running are the injectors supposed to squirt when turning the MAF needle????
Thanks for the help guys!
#16
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
Yes I did, It was the AFM I found a used one on eBay for about 60 bucks. Make sure you get the same part number thats in yours.
I also got a new cat installed, Just a heads up the direct replacement from magna flow does not fit. It was about 3 inch's to short. I had to get there universal replacement
Hope that helps
#18
Registered User
Thread Starter
Join Date: Aug 2004
Location: santa rosa,CA
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
#19
Glowing Red Catalytic Converter on 94 3.0 Pickup
Aloha from Hawaii, I am the proud owner of a 3.0 4x4 manual pick up and have been dealing wih a few issues, most recently I just noticed my catalytic converter was glowing red hot after driving only 30 minutes. I have never experienced this problem before. My truck has been running fine with no check engine light on. I do know I have a misfire in cylinder 2 (all cylinders checked out fine for compression test, but #2 leaked for leak-down test) would that cause the cat to clog up and thus glow? Obviously the glowing indicates I need to replace/fix it...what would possibly cause this? Thank you for any help.
Last edited by Kalihi,HI; 12-29-2014 at 12:48 AM.
#20
Registered User
Join Date: Jul 2012
Location: Northern Colorado
Posts: 1,776
Likes: 0
Received 109 Likes
on
81 Posts
If a cylinder is misfiring, that will inject unburned fuel into the exhaust stream. The catalytic converter will do its best to burn it before it goes out in the exhaust, creating a lot of heat and a glowing converter. That does not mean the cat is plugged or defective, just that it is working harder than it was designed to. However, eventually the excess heat will damage it.
The important first step is to fix the misfire problem.
The important first step is to fix the misfire problem.
Thread
Thread Starter
Forum
Replies
Last Post
GreatLakesGuy
The Classifieds GraveYard
8
09-04-2015 09:27 AM
crashburnoveride
86-95 Trucks & 4Runners
1
07-10-2015 06:39 AM