ok i new to this sight and new to my 91 camaro.been trying to figger out exactly what kind i have. from ever were iv looked and on this sight there were no i-roc z28 made in 91 except the convertables..it has a 5.7 tpi.no powere windows or doorlocks..but does have ac..no t tops.ect...crazzy thing is on my dash it has an emblem of Z28 I-ROCK..some one was telling me it is fake but from the way it looks it does not look fake..but any ways..when i first boaght the car it ran great except the fack when u stopped at a read light it would die..i had the intanke manifoled gaskit replased..after that car ran great with no problems..but two weeks later..now i have a starting problem..and from what iv seen on the forms.this guy said it was his fuel injectors..so really not sheer..the only code that pops up is a 99..also now my car back fires. but this is what dont make sence..to me its an exost leak..most likelly..but when im exceleratin it dont back fire. it only does it when i slow down..like when i take my foot off the gas in 4th gear at 45 to 55 miles an hour.but if i push in the cluch it dont back fire..so now hears one more thing..when i start the car its a hit or miss..some times it takes a copel crakes and it will start..or some times it starts fine..but when it takes a copel cranks.when it starts i get whight smoke out of my exost..car starts to idel like crap..then it go to idel fine and smoke goes away..sorry i need some help..fustrating..and need help figering this stuff out..so if there is any one out there that has delt with theez problems hit me up and tell me if im on the right track..thank you

 

First off, welcome to TGO, secon, use spell check! There is no such thing as an I-ROCK. The car is an IROC-Z. It stands for International Race Of Champions, Z28. Also, there was no IROC-Z in 1991. The dash badge did not come on that car. It was replaced somewhere along the way. The smoke when the car starts is the valve guide seals. This is very common. It's just a little oil burning off at startup.

 

It sounds like the backfiring could very well be the fuel injectors - not an exhaust leak. If the injectors are the originals they are probably not flowing well and could be causing raw fuel to pass through into your exhaust where it ignites and causes the backfiring without throwing any codes. Same thing was happening on my '91 and disappeared when I put in new injectors. I used reman Bosch III units from fuelinjectorconnection.com but there are several companies selling them - some are sponsors on this site.

 

Thanks for the heads up on using spell check..lol..anyways....and I do now what IROC means..if you go to the Camaro facts there were IROC-Z made that year...there were 3,203 of them made but they were convertibles..so if there were nun made that year then that's a lie to. It says that right here on this web sight..and as for my dash its not fake..and not replaced..but if you say so

 

You are reading something wrong somewhere concerning the IROC designation. Post up a link to these "Camaro Facts" you are reading so we can see - maybe there's a typo on the website that was never caught by the admins.

To have IROC on a car, GM had to PAY for the licensing of it to the IROC association. GM stopped paying for the IROC name - last legal use of IROC by GM was 12/31/1989. This fact is listed in the first line of the 1990 Camaro History:

1991 Chevrolet Camaro History

The 1990 model year was only a half year of production due to Chevrolet not renewing the IROC contract, no IROC-Z's were produced after 12/31/1989. Instead, the 1991 Camaros were introduced early during last half of the 1990 model year.

So, in 1991 the IROC name was dropped from all badges on ALL cars, and just Z-28 was used (Z-28 is a trademark designation of GM, comes from the Z28 RPO code). This is stated in the first line of the 1991 Camaro History:

1991 Chevrolet Camaro History

The regular Z28 name returns since GM was now unable to make IROC-Z's....

What we are trying to tell you, is that the badge on your dash has been replaced - we're not saying it's a "fake" - we're saying it's been replaced with an original IROC-Z badge if in fact your car is a 1991 car. Anyone can get badges on ebay - search "82 92 camaro" on ebay and you'll get 70,000 hits any day of the week for all kinds of stuff.

Look at your VIN, and run it through the VIN decoder - that will tell you the real year of your car. If it's a 1990 car, then it could be an IROC car. It could very well be a 1990 car with the 1991 ground effects added, and thus it could be an IROC car. Or it could be a 1991 car with an IROC badge added. Hell, it could be a 1982 car with badges and ground effects added. There's literally hundreds (maybe thousands) of folks here at TGO that have changed ground effects, badges, hoods, almost everything from different years. That's hot-rodding ... we make our cars our own. I myself have a 1992 RS car, but I have glass T-tops from a 1986 car (no glass tops offered in 1992), and I have the louvered hood from a 1985 car (no louvered hoods in 1992 either).

Unless you are the original owner of the car, it's 100% guaranteed that something has been changed.

 

OK - I see where you are looking at the 3203 number. Yes, it appears to be a typo - I'll make admin aware of it.

 

Go to the home page then click on Camaro tech data. Then click on 91 Camaro scrole down and it will
Tell u how manny cars were made that year...its right there for the convertibles..I know they had to pay for the that name..I know that it could b and aftermarkit dash badge but the thing is that it doesn't..and as for my vin it don't come up on this web sight.I have someone trying to figger this out for me..thank you guys for your help. I know people change and make cares there own but there is just somthing differnt about this car that don't make sence..as soon as I figger this out ill let u know...

 

It's really not a typo... That chart used to go from 1982-1992 all in one chart. It's another casualty of splitting up every year of the tech data into it's own page.

Just looking at the pic, that's not an Iroc, it's a 91 or 92 Z28. The difference is mostly the name, the only standard equipment difference on a late Z28 vs earlier Irocz is the suspension. F41 was standard on the Z28, with FE2 optional. FE2 was standard on the Irocz.

 

Well, now that the chart has been split up, and thus the info taken out of context, it now presents confusion for folks. I sent PM to JT, maybe he can modify or correct to maintain consistency with the fact that there were no IROC F-bodies after 12/31/1989.

 

For sure it represents a problem... They could just change the wording, but the point is that the entire article doesn't make as much sense as it did before it was split up. To be separate pages like it is now, the whole thing really needed to be rewritten. It never should have been split up in the first place, if someone wasn't going to take the time to make it comprehensible.

 

Thanks for bringing the issue with IROC-Z being used in the data. I've made the correction. As far as splitting the tech data, the person responsbile for that is no longer involved with the site as it was part of a "flip".

I would still be very interested in correcting any of the issues there.

 

Thank you...just lost on what I have..so now I know...but still trying to figure out what im having this ishu with my car starts fine one day and then the next it takes to or three time to start and when it does it ideals hard and whight smoke comes out of exost..then after a few seconds it goes to ideals fine..driving me nuts so check my valve guide seals..sorry just got the car a month ago and already had the intanke mainfolde gasket replased because car was during at every red light...it was sucking in to much air from what I was told...so trying to figure out this proble that happened a week after that gasket was replased..

 

My honest opinion, is that the Tech Data should be presented as it was originally. It was written so that each new year builds upon the previous year. In most cases, skipping ahead to a specific year, without reading at least the previous year, is going to lead to context errors. The chart issue is just one example. In it's original context it didn't really imply that Iroc convertibles were made after 1990.

Up until a few weeks ago, I had the HTML file of the old Tech Data article, from my last re-write, archived on a hard drive. Unfortunately the document was lost in a crash. But my opinion is that the article should go back to a 1982-1992 document. As it is now, a person has to click on several pages to read it and comprehend it as it was originally written. Even then it doesn't always fit together right. I've looked over the current Tech Data several times, and I don't see a way to make it work as it's currently formatted.