Guest RON JONES Posted May 11, 2001 Share Posted May 11, 2001 Well guys I put a can of that STUFF in and retarded the timeing as much as I could,new plugs and took the air cleaner out.It failed?I really thought the timeing thing was goimg to work,but the #'s were better the first time? Any ideas?The car runs great,doesn't smoke and has power.How Can I get this thing to pass? Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted May 11, 2001 Share Posted May 11, 2001 Post your before/after numbers and limits you have to meet if you can......sorry it didn't work this time. If you failed the idle test I guess 5psi in Mickey Thompson ET's couldnt' explain that Were you running premium gas? I toss in 1/2 litre methyl hydrate per half tank with highest octane gas (ie. most crap/least gas). Simply put the less 'real gas' in their the less emissions. Although I'm leary of the methyl hydrate's effects I've no known problems from it to date. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted May 11, 2001 Share Posted May 11, 2001 Theres always the last resort... the crapalytic converter! Quote Link to comment Share on other sites More sharing options...
DavyZ Posted May 11, 2001 Share Posted May 11, 2001 It really bothers me that the car will still not pass emissions. There must be something really wrong somewhere to have that happen. This forum is very good at making emissions but not very good at eliminating them?? Sorry to bail on you, but I'm out of ideas. There has to be something very wrong somewhere, though, for that car not to pass. I'm very puzzled. Sorry, Bub. David Quote Link to comment Share on other sites More sharing options...
SpeedRacer Posted May 11, 2001 Share Posted May 11, 2001 Ron, If the NOx numbers still aren't very high try advancing the timing. Advancing the timing causes the combustion temp. to go up which lowers both HC and CO. Just don't run it up to high so it fails on the NOx level. The problem is that it's like a see saw. HC & CO on one side and NOx on the other. BTW, preventing the EGR valve from opening will drastically lower both HC and CO but watch out for the NOx level. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 12, 2001 Share Posted May 12, 2001 I could be wrong, but I thought it was the other way around, retarding the timing will raise engine temp. They used to sell a simple nox kit that was just a rubber cap to put on the vacuum advance port (disconnecting it from the distributor) ad you'd set the static timing 1/2 of what it was originally. This presumably would lower Nox emissions. I could be wrong though, I never was one to know much about smog controls outside of how the heck to get them off the engine. Lone Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted May 13, 2001 Share Posted May 13, 2001 quote: Originally posted by lonehdrider: They used to sell a simple nox kit that was just a rubber cap to put on the vacuum advance port (disconnecting it from the distributor) ad you'd set the static timing 1/2 of what it was originally. I forgot to mention that I think. I yank my vac. advance hose from my dizzy and put the tube on a T bolt for my valve cover in my smog 'tune' Timing in any way just seems bad for me and from my memory on smog tests. Previous shop puts ball bearing in the hose to be stealthy but I don't care about that Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 14, 2001 Share Posted May 14, 2001 Heh, funny you mention that. I had a old ranger with a 2.3l in it, it starting idling really crappy and I couldn't figure it out. Finally, took it to Ford and they replaced the EGR valve which worked for all of two weeks. I found if I unhooked the EGR and plugged it, it would run smoothly. I eventually just cut off a small machine screw and pushed it inside the hose and hooked it back up. Idled great then, didn't smog it again as it was a lease vehicle and turned it in. Lone Quote Link to comment Share on other sites More sharing options...
DavyZ Posted May 14, 2001 Share Posted May 14, 2001 Ron, what is the make and model of car, and what is the engine size & type we are dealing with here? If I know that, I'll do some asking around and find out what I can. More info please... Quote Link to comment Share on other sites More sharing options...
Guest RON JONES Posted May 14, 2001 Share Posted May 14, 2001 Its a bone stock 77 280z.FI L6. Quote Link to comment Share on other sites More sharing options...
Guest RON JONES Posted May 15, 2001 Share Posted May 15, 2001 The NO #'s are fine,lots of room there.Its the CO #'s that are the problem.The frist test was 5.27% and the second test(with the timing retarded)was 5.44%.I was talking to a guy at the track who told me to run some alcohol mixed in with the gas.He did this twice and it worked.I'm not talking about a coulple of those little fuel line anti-freeze cans,He's talking about a few gallons of race fuel!Also when I retarded the timing the Engine temp did go up a good 30 degrees. [ May 14, 2001: Message edited by: RON JONES ] Quote Link to comment Share on other sites More sharing options...
DavyZ Posted May 16, 2001 Share Posted May 16, 2001 Ron sorry about the delay, but my mechanic friend has been too busy to talk with me. Maybe Randy from Modesto can chime in, he may have some good ideas. You could try to email him too. He's a Ford tech, but has a FI turbo'd 280Z. Quote Link to comment Share on other sites More sharing options...
SpeedRacer Posted May 17, 2001 Share Posted May 17, 2001 Ron, The new "Clean Air" fuel has alcohol in it. You didn't hear it from me but I'd plug the vacuum line going to the EGR valve, run the timing up to about 14-16 degrees, run it hard and take it back through. I think it will make it. Sounds like the converter is a bit weak but you should still be able to make it. Quote Link to comment Share on other sites More sharing options...
Guest RON JONES Posted May 18, 2001 Share Posted May 18, 2001 Yea,I'm thinking the converter is not doing its job as well.I'm not as worried as I was before about it.It passed inspection(not emissions) and I got My hard plates for it.I'll get it figured out one way or another. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.