catalytic converter question - DodgeForum.com

Go Back  DodgeForum.com > Dodge Trucks > Dodge Ram > 2nd Gen Ram Tech
Reload this Page > catalytic converter question
Notices
2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

catalytic converter question

Reply

 
 
  #1  
Old 01-16-2018, 04:56 PM
true blue
true blue is offline
Amateur
Thread Starter
Join Date: Nov 2017
Location: Texas
Posts: 36
Default catalytic converter question

I have a 96 Ram 1500 318/220K+ miles...daily driver, part time hauler. The cat isn't clogged but obviously bad...no temp increase front to rear on cat and #2 O2 sensor imitates #1 O2 sensoron the scanner. Fuel trims great/hovering round 0, both long n short term trims at steady engine load and normal operating temp, no money light (can't figgur that one), great power band n okay MPGs. The exhaust is leaking aft of the cat n the muffler is just about rusted thru...cat has over 150K miles n like most 2nd gen Dodges, ol blue once suffered the dreaded celibacy of the plenum, however, I repaired her long ago (Hughes). No sniffers for inspection here in DFW, are there any advantages to replacing the cat along with the muffler, say higher mpg, better performance, etc?
 
Reply With Quote
  #2  
Old 01-16-2018, 07:43 PM
HeyYou's Avatar
HeyYou
HeyYou is offline
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 48,440
Default

Your exhaust will flow better, and be a bit louder..... so, maybe a bit better power, but, likely not enough to notice, unless the cat really IS clogging, in which case, yeah, you'll notice. Same goes for fuel economy.

Then, of course, there is the legal requirement...... Federal law mandates that it be there, and in proper working order. (thus, inspections/tests/whathaveyou in some locales.) Depending on local laws, they might REQUIRE a 'stock' replacement, and not permit use of aftermarket parts.......

On the pre-98 trucks, I don't think the PCM cared very much about cat efficiency. Mine was hollow when I bought it, I drove it for seven years, and it NEVER set a code for the cat......
 
Reply With Quote
  #3  
Old 01-16-2018, 07:55 PM
Moparite's Avatar
Moparite
Moparite is offline
Record Breaker
Join Date: Feb 2015
Posts: 2,419
Default

cat has over 150K miles
96 had a recall on the cats. Is this a replacement from the factory? Either way i would replace it with a magnaflow cat. I think they are 50 state legal but not sure. I had mine on about 50K and replaced the rusted muffler with a 304 stainless one.
 
Reply With Quote
  #4  
Old 01-17-2018, 12:59 AM
hometheaterman's Avatar
hometheaterman
hometheaterman is offline
Champion
Join Date: Jan 2005
Location:
Posts: 4,245
Default

I second the Magnaflow cat. I love mine. I originally had the oem style Magnaflow high flow one, but I had to replace it recently when I did my headers. It wasn't bad, but I needed a different size. This time I went with their spun style converter.
 
Reply With Quote
  #5  
Old 01-17-2018, 07:41 AM
Ramman18's Avatar
Ramman18
Ramman18 is offline
Record Breaker
Join Date: Feb 2007
Location:
Posts: 1,588
Default

You will notice an increase in power with a Magnaflow. I'm on my 2nd one. And DFW used to smog as every vehicle had the sticker on the corner of the windshield. Not sure how you don't have it unless that changed somehow. Or just hollow it out and drive.
 
Reply With Quote
  #6  
Old 01-17-2018, 08:43 AM
true blue
true blue is offline
Amateur
Thread Starter
Join Date: Nov 2017
Location: Texas
Posts: 36
Default

MPGs are noticeably down, but I think that has more to do with alcohol in the fuel n age, than the cat (I might be wrong). 20 years ago, ol blue used to average round 20 on the hiway n maybe 15 combined (if memory serves) but now hiway turns in at best 15/17 MPGs. depending on the gas I get (gas station tanks recently filled or not). Did the throttle body mod n it seems to have power on the hiway when layin' in to her. The #8 plug as clean as all the rest. Thnx for the advice guys. Ellis county just south of Dallas, Dallas or Tarrant county has no tail pipe sniffing for inspection, never has as long as I've been here/round 12 years. They use the computer spying method here, probly has something to do with cost to the inspection station n the state won't reimburse. Ive been lookin' into the Magnaflow cats n exhaust, seems to be the best bang for the buck. Don't have any record as to the replacement cat if it's factory or not. Thnx again.
 
Reply With Quote
  #7  
Old 01-18-2018, 01:01 AM
Ramman18's Avatar
Ramman18
Ramman18 is offline
Record Breaker
Join Date: Feb 2007
Location:
Posts: 1,588
Default

15/17mpg is EXTREMELY good. I see 12 city and maybe 14 on hwy.

Just throw on a Mag cat and keep driving. You're doing great.
 
Reply With Quote
  #8  
Old 01-18-2018, 01:11 AM
AtomicDog
AtomicDog is offline
Record Breaker
Join Date: Sep 2012
Location: Central VA
Posts: 1,598
Default

When I changed out my stock catalytic converter, I went with a Magnaflow Converter 99047HM (dual 2" inlets, 3" outlet, front O2 sensor port), so I could get a bit more flow with 3" exhaust from the back of the converter to the rear. I also added some 3" pipe into a Dynomax UltraFlo Welded Muffler #17233 and a custom 3" tailpipe. The setup flows and sounds nice.
 
Reply With Quote
  #9  
Old 01-18-2018, 11:56 AM
true blue
true blue is offline
Amateur
Thread Starter
Join Date: Nov 2017
Location: Texas
Posts: 36
Default

Ramman, I'm lookin' into some 1.7 rockers (found some in a bone yard corpse but they wouldn't lemme strip the engine, ah well). I looked at getting a new F150, but when I saw the price, I said to meself..."self, I can add lotsa cool stuff to 'ol blue and gas 'er up a whole bunch ta boot for that kinda money"...not to mention, I just haven't been able to kill this beast with neglect. Recently resealed the tranny cause just about every oil seal had crapped out. I was pleasantly supersized to learn the synchro's, bearings n gears still seemed to be in petty fine condition. Well, 'cept for the 1st upshift of the day when it's REALLY cold (she clunks into gear 1,2 n 3). My few "repairs" to get her up to std's for another 20 years has turned into a restoration n the cat n exhaust is my last treatment of the drivetrain. I was also surprised to find that all the u-joints are still good after 22 years n 220K+ miles...wish I could say the same for the paint...gggrrrrr! Still gathering up the parts for 4wheel ABS...I've been told that's a big mistake, time will tell.
 
Reply With Quote
  #10  
Old 01-18-2018, 12:04 PM
true blue
true blue is offline
Amateur
Thread Starter
Join Date: Nov 2017
Location: Texas
Posts: 36
Default

AtomicD...has the 3" pipe set off your money light? I've read that the lack of heat due to better flow can hurt the feelings of these old computers. I have the factory pipes still n some in the mad monk squadron says otherwise...any thoughts or advice?
 
Reply With Quote
 
 
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
1998 Ram Sport
2nd Gen Ram Tech
6
10-04-2007 06:59 PM
pcman
2nd Gen Neon
1
04-10-2007 09:15 PM
KGT
1st Gen Neon
20
09-25-2006 12:43 PM
ChrisTX
2nd Gen Ram Tech
3
10-31-2005 09:05 PM
Gadv
Dodge Ram
0
02-29-2004 02:49 PM

Thread Tools
Search this Thread
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Featured Sponsors

All times are GMT -4. The time now is 07:24 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: