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alienshadow
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May 20, 2010, 3:11 PM
Post #1 of 18
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93 chevy 1500 4x4
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Just wondering here.. What can I check on my truck to see what is causing my exhaust fumes to be so strong? Smells like gas not burned oil.. If that makes since.. In school line to pick kids up someone knocked on my window and asked could I cut my truck off the fumes were killing them.. They where parked behind me... Anyway crazy question I know..It does have duel exhaust and no converter.. exhaust is new except for left side of manifold...Thanks
If you cant fix it then dont mess with it...
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re-tired
Veteran
/ Moderator
May 21, 2010, 8:20 AM
Post #2 of 18
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Re: 93 chevy 1500 4x4
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If you have removed your cat and prob one or all 02 sensors, then your truck has gone into a fail safe mode >>fixed timing and full rich.
LIFE'S SHORT GO FISH
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Tom Greenleaf
Ultimate Carjunky
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May 21, 2010, 9:26 AM
Post #3 of 18
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Re: 93 chevy 1500 4x4
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Alien,
Wanted some others to chime in on this first. RT - we've had some off open forum communication on this but the first I've heard of the dual exhaust and now no converter!
How long has the exhaust been this way? I didn't think it would work properly without carefully putting in the sensors either. I would have advised go ahead if you want and get duals but it should have been with convert(s) and the sensors. Of course it adds tons to the costs.
Can't do that and be street legal where I am. Was behind a truck with the 18 wheeler stacks advertising custom exhaust all over the thing so things can be done but need to be engineered to meet local rules anyway.
TMK even the year 93 the pre converter O2 sensor can alter fuel delivered based on it's input. The one(s) after are checking that all went well before exhaust got that far but don't change adjustments. Not sure for the year.
I have no direct know how on this custom job and whether it can run well and stay that way?? As said, I can't be part here of removing any emission related device for street use. So far nobody I know is doing unregistered off road only with vehicles even up to 1993. Some much older stuff tolerated about anything. This needs to be just right and dang near OE to run properly.
Was there an attempt to put sensors in this exhaust?
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alienshadow
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May 21, 2010, 4:24 PM
Post #4 of 18
(3383 views)
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Re: 93 chevy 1500 4x4
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Okay guys the sensors are there none are missing and truck runs perfect.. When I bought truck it already had duels on it it was just rusted out I posted way back on a quick fix but decided to get it done the right way...I thought at least no rust now... The conv was already missing I didnt see a need to add one and the guy at the exhaust place said no need he just put a dummy in its place looks like one but pipe runs straight through with welds on each side...He has been in buisness for 20 plus yrs so I trusted his judgement he has always done right by me on other deals... If sensors where an issue wouldnt check engine light be on??
Only thing I notice is when truck is cranked up on cold start it sputters but not bad give it some gas and I am good for the rest of the day no sputter would like to figure out what that is.. I had a Sea Foam treatment done and I have picked up 5 miles to the gallon which is great.. Any advice is always great...
If you cant fix it then dont mess with it...
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alienshadow
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May 21, 2010, 5:07 PM
Post #6 of 18
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Re: 93 chevy 1500 4x4
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LOL Hammer no way.. The way the economy is shoot.. Besides why dont they FINE BP for all their mess? Thats bigger than some emissions if you ask me..Years and Years of rebuild coming up...
Well anyway thanks for the help guys didnt really come here to put someone out of buisness..
If you cant fix it then dont mess with it...
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Hammer Time
Ultimate Carjunky
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May 21, 2010, 5:22 PM
Post #7 of 18
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Re: 93 chevy 1500 4x4
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Most exhaust shops are very strict about not doing things like that. It's very surprising that this one would even consider that. Their lively hood is at stake. Most owners would fire an employee for doing that in a heartbeat.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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alienshadow
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May 21, 2010, 5:25 PM
Post #8 of 18
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Re: 93 chevy 1500 4x4
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It was the owner himself who done it...I am shocked to learn this tonight if I had known it was illegal it would of never been done... But being it isnt done what do I do now? I mean the truck runs fine.. Thanks Hammer
If you cant fix it then dont mess with it...
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alienshadow
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May 21, 2010, 5:30 PM
Post #9 of 18
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Re: 93 chevy 1500 4x4
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Also meant to add its a 93 during inspection they dont even do an emissions test?????
If you cant fix it then dont mess with it...
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Hammer Time
Ultimate Carjunky
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May 21, 2010, 5:37 PM
Post #10 of 18
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Re: 93 chevy 1500 4x4
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Tampering with emission controls in any way by anyone is against Federal law and punishable by a big fine but for an exhaust shop to eliminate a Converter is like a pharmacist dealing drugs.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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alienshadow
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May 21, 2010, 6:05 PM
Post #11 of 18
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Re: 93 chevy 1500 4x4
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It can stay like it is... I am glad to know the law however... I guess this is why I smell the gas smell because of no converter?
If you cant fix it then dont mess with it...
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Tom Greenleaf
Ultimate Carjunky
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May 22, 2010, 1:38 AM
Post #12 of 18
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Re: 93 chevy 1500 4x4
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Everyone please calm down. It just may be legal for the year to delete converters depending on where you live. The rules/laws change by the month. It was just recent that new cars sold had two different rules. You would need to meet California emissions and identical to Massachusetts and the other 48 states were lesser regulated on that. Read a new car sticker on the window.
The issue is with a 93 gas engined 1500 Chev truck is that all were sold new with converter and sensors were designed for that. The sensors can fail converts or not and cause over fueling problems which should set off a check engine light.
Long before converters cars and trucks didn't pour raw fuel out if running well. Some passed as clean as properly burned real gasoline should only emit CO2 and water. Trouble is no gas or engine is that perfect for tight specs now.
If the exhaust shop that does this work doesn't know local rules then they really could be in trouble. If legal it still has to be done such that it runs properly and doesn't make a raw odor of fuel. That was never a plan for vehicles long before any emission controls.
Side and shocking topic: There's a place or many in the USA that you don't need to so much as register a vehicle and I've been there. There were states that allowed drinking while driving (bet that's done by now) and didn't require inspections at all. BUT - you were not allowed to be intoxicated at all or drive a vehicle that couldn't pass safety regulations/laws and would be pulled off the road right then if not up to specs for safety items.
Laws and legalities aside the engine wants things right. Not sure if this is malengineered exhaust or a fuel system fault right now,
T
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Hammer Time
Ultimate Carjunky
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May 22, 2010, 2:43 AM
Post #13 of 18
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Re: 93 chevy 1500 4x4
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Nobody is excited or upset Tom. It's just a discussion.
There are only 2 sets of standards. There is Federal and there is California. What other states do in their inspections doesn't change Federal law but it's not legal to remove a Converter anywhere in the US.
I'm sure not having a cat is having some effect on what's coming out of the tailpipe. The age and mileage of the vehicle probably has a lot to contribute to it also.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
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May 22, 2010, 6:07 AM
Post #14 of 18
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Re: 93 chevy 1500 4x4
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I believe you are right HT - there are two standards for brand new. California and a few years back Massachusetts joined them with the same standards. TMK all other states are on the Federal standard for new. CA once stood alone as the different one and back when if your car was new you couldn't register and inspect it there without the alterations that state required.
I can barely keep up with the changes of just MA. Once, 10 years and over there was no emission testing. Then went retro to model year 1984 and up forever. Well, forever didn't seem to last so they changed again to now 1996 and newer forever and older exempt from testing - BUT no visual alterations, no smoke seen and no CEL on the older vehicles that had them at all.
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I haven't found a site that keeps current data and requirements by location/state. MA regulated that fuel sold for Winter have additives to make it more volatile. You want better MPGs buy your gas in any of the other New England states.
Here and I think CA too, you can't sell a lawn mower, weed whacker, chainsaw or other fueled device that isn't up to state codes for emissions! You cannot use less than 89 octane fuel in those either. Not sure of exact regulation but wood stoves sold new I believe have to have a catalytic converter. Yikes!
Big Brother is Watching.
Check out a real sign with a turkey on it!
T
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alienshadow
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May 22, 2010, 10:07 AM
Post #15 of 18
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Re: 93 chevy 1500 4x4
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Gobble gobble Tom lol.. Yeah as you know me and Hammer get along fine.. He tells it like it is and I always comment back to him.. I respect him and I hope I havent ruffled his feathers lol... As far as the convert goes I am going to leave it like it is sure enough if I replace it then I will have to buy all new sensors and who knows what else...Sorry about that guys I really dont think the fumes are bad just some idiot who cant probably smell her own poots who knows..
Side note A/C is doing well cools better than a new car to me.. I know I have a 2010 Dodge Grand Caravan.....
Still wonder why the guy didnt tell me its the law lets put one on.. He knows how picky I can be with my stuff.. I would of paid him to do it at the moment but now he would have to cut all that out and replace so I would have double in it.. I cant help if he isnt following the regulations set by the state its his fine not mine...
If you cant fix it then dont mess with it...
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Hammer Time
Ultimate Carjunky
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May 22, 2010, 10:58 AM
Post #16 of 18
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Re: 93 chevy 1500 4x4
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I certainly don't have a problem with alienshadow but I'd love to choke that shop owner that did that. There are people all over that will do just about anything for a dollar.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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alienshadow
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May 22, 2010, 11:49 AM
Post #17 of 18
(3310 views)
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Re: 93 chevy 1500 4x4
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True Hammer makes me wonder how much I overpaid for the job... Well I hate a corner cutter...And the fact he knows I want my stuff right makes me even madder..Thats the OCD in me..
If you cant fix it then dont mess with it...
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Tom Greenleaf
Ultimate Carjunky
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May 22, 2010, 12:54 PM
Post #18 of 18
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Re: 93 chevy 1500 4x4
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Gotta agree with Hammer - the guy needs to be choked! It isn't fair to do that when you know it's a requirement either to undercut the price or fool you and charge what it would be if done properly. Converts are expensive just because of the metals used in them. You can make an exhaust with them that doesn't hurt performance at all.
Jeez the fastest car street legal I think is a Bugatti Veyron and they can be sold to the US as far as I know. Have all the safety and emissions but does have a top speed of 407kmh or 257(?) MPH which is a bit silly as there's nowhere you can realistically drive that fast even where there are no speed limits if still so like the German "Autobahn" or Italy's "Autostrasse" it would be a bit much.
It stinks what he did and damn well should be in the know!
T
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