Failed CO E-check, need some ideas to pass, 76 D-jet, high HCs and COs |
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Failed CO E-check, need some ideas to pass, 76 D-jet, high HCs and COs |
newto914s |
Dec 2 2008, 08:47 PM
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#1
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Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
I'm thinking of registering my 914 in Colorado, cars been running better than I ever remember, but I failed my e-check today. Visual inspection was fine, needless to say they couldn't fine anything on the car, but that also means they didn't see I have no smog pump or catalytic converter. I even passed on CO2.
But my HCs were 1825 at 2500rpms and 1047 at idle, 600 is the limit. And my COs were 11.7 at 2500rpms and 8.19 at idle, 3.5 is the limit. About the car. It's a 2056 running D-jet. I turned up the fuel pressure to compensate for the extra displacement, but I think that's how I shot myself in the foot. I'm also using SirAndy's old MPS. It's a 1.7 that he tweeked to run his old 1.8. My car loves it though. My car ran like shit with the 2L MPS, and it held vacuum and everything. I think that covers it. I'm thinking of turning down the Fuel pressure, leaning out the idle on the ECU and crossing my fingers. Any other ideas? Do those numbers seem way to far off to be cause by fuel pressure? Thanks guys. Samson |
JeffBowlsby |
Dec 2 2008, 09:59 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,501 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
Put a cat on it if needed.
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Zundfolge |
Dec 2 2008, 11:25 PM
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#3
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Senior Member Group: Members Posts: 847 Joined: 12-August 07 From: Colorado Springs Member No.: 7,994 Region Association: Rocky Mountains |
Once you do get it to pass, make sure you get the classic car plates so you don't have to go through this again.
Back when El Paso county was still in the e-testing program there was just no way I could get mine to pass (carbs, cam, headers ... my HCs read out at 10,000 ... but that's as high as the machine goes) So I sold the car to my brother in Kansas (where there is no emissions testing), then we got out of the e-testing program and so I bought the car back. |
orange914 |
Dec 2 2008, 11:34 PM
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#4
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
I'm thinking of registering my 914 in Colorado, cars been running better than I ever remember, but I failed my e-check today. Visual inspection was fine, needless to say they couldn't fine anything on the car, but that also means they didn't see I have no smog pump or catalytic converter. as a rule I even passed on CO2. But my HCs were 1825 at 2500rpms and 1047 at idle, 600 is the limit. And my COs were 11.7 at 2500rpms and 8.19 at idle, 3.5 is the limit. About the car. It's a 2056 running D-jet. I turned up the fuel pressure to compensate for the extra displacement, i would lean out the fuel pressure to 29 lb.s, set the lean ecu screw back (if it's been fully fattened). this will most likely drive h.c.'s way up but bring c,o. to limits. then retarding timing from stock setting (allowed in ca. testing), this will reduce h.c.'s... if it's still not within spec.s but fairly close a cat will definately clean the rest up. the cars going to run like shit but like i said these motors where NOT designed to run well with in these spec.'s... definately reset it all after the smog test! I think Do those numbers seem way to far off to be cause by fuel pressure Thanks guys. Samson i've heard these injectors dont atomaize well over 30 psi, that could be a huge contributing factor of not only to rich but globs of unburnt fuel do you have a sniffer avalible for use will you tweak these settings? mike |
Cap'n Krusty |
Dec 3 2008, 12:06 AM
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#5
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Adjusting the timing to anything other than dead nuts on spec is NOT allowed in CA. Confirming the timing is but one of the mandatory steps in a smog check (along with visual, tail pipe, and evap tests).
Now, on to the problem car. First you have to get the CO right. Sounds like a bad MPS or REALLY out-of-whack vacuum. Is the cam stock? Not "stockish", STOCK. A non stock cam significantly changes the vacuum and throws everything out the window. (However, Jake assures me his profile works as well as stock.) Once the vacuum is assured, then the fuel pressure. If those don't do it, you need to verify the operating voltage. Too high or too low will affect the CO. If you still need lower CO, you may have to make the air injection, the EGR, and the catalyst work, although the cat is mostly for HCs. Setting the valves to .016" does wonders for high HCs, but only after the CO is fixed. Run the lowest grade fuel you can find, as that will promote more complete combustion, further lowering the HCs. I suggest you avoid ethanol mixtures, but I'm not that familiar how they work. The Cap'n |
zonedoubt |
Dec 3 2008, 12:10 AM
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#6
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Canadian Member Group: Members Posts: 668 Joined: 14-May 03 From: Vancouver, BC Member No.: 696 Region Association: Canada |
If you plan on dialing in your CO%, get your hands on one of these: http://www.gunson.co.uk/item.aspx?cat=698&item=1835
I got one cheap off the internet and it works like a charm. |
Gint |
Dec 3 2008, 07:54 AM
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#7
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Mike Ginter Group: Admin Posts: 16,071 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
Samson, you're 914 will easily pass Colorado emissions for the year of manufacture if you re-adjust your fuel pressure to stock and do a full tune up on the car to include stock timing settings, a valve adjustment and oil change. Trust me... BTDT. Let me know if you need any help.
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newto914s |
Dec 3 2008, 08:54 AM
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#8
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Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
That's what I'm hoping Mike. I'm going to pick-up a fuel pressure gauge from Harbor Frieght today and put back on the original 2L MPS. The plugs are fairly new as well as valve adjustment.
Captin, I did forget the mention the cam. It is stockish. The short block is 40k mile old GEX rebuild, so it should be a reground stock 2L cam. I have a vacuum gauge, how would I check the engines vacuum, and what numbers should I be looking for? would I just attach it to the plenum and rev the engine a bit? Timing should be nuts, but they didn't check that, if I retarded it a couple degrees would that help, or just send other reading through the roof? |
Gint |
Dec 3 2008, 10:49 AM
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#9
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Mike Ginter Group: Admin Posts: 16,071 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains |
Colorado isn't quite as anal as CA... yet. They don't check timing here. They only check the CO and HC with a tail pipe sniff test (standing, no dyno). They don't even do as thorough an inspection for smog equipment as they do in CA. They're supposed to though, so beware.
And generally speaking, retarded a few degrees will help a little in an idle sniff test, but stock should be more than adequate. |
racunniff |
Dec 3 2008, 10:55 AM
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#10
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volt914 Group: Members Posts: 172 Joined: 21-August 06 From: Fort Collins, CO Member No.: 6,705 Region Association: Rocky Mountains |
Colorado isn't quite as anal as CA... yet. They don't check timing here. They only check the CO and HC with a tail pipe sniff test (standing, no dyno). They don't even do as thorough an inspection for smog equipment as they do in CA. They're supposed to though, so beware. And generally speaking, retarded a few degrees will help a little in an idle sniff test, but stock should be more than adequate. It's not exactly *good* news, but Colorado has a cap on how much you are required to pay in attempting to meet emissions requirements. After that, you can get a waiver: http://www.aircarecolorado.com/vfails.htm QUOTE The limit is $75 for 1967 and older vehicles and $715 for 1968 and newer vehicles. Cost limits apply to all vehicles regardless of whether they failed the idle test or the I/M 240 test. However, these limits do not apply if the vehicle failed for visible smoke or missing emissions control equipment. You may be eligible for a waiver if you have reached the spending limit and your vehicle still won't pass the emissions test. Hardship waivers are also available. Call the Division of Motor Vehicles Emissions Office, 303-205-5603, to inquire about waivers. |
newto914s |
Dec 3 2008, 11:50 AM
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#11
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Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
$715 goes a long way tords a subbie swap, megasquirts, or SDS. all things I would rather do than bring down the HCs on a car I drive 2000 miles a year. If it doesn't pass or is not close this next time I'm just going to re-register it again in Ohio. No e-check out there. I'll have to wait a couple weeks to do that though.
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Mikey914 |
Dec 3 2008, 01:56 PM
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#12
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The rubber man Group: Members Posts: 12,660 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
If you just want to pass, run the gas down till the light comes on, add in a quart of denatured alcohol. Denatured alcohol is what is used in marine stoves as it has no CO emissions when burnt.
The downside is that the alcohol can mess with the seals and hoses if left in for any amount of time, so drive it home, drian the tank, fill it up and and go for a 30-40 min drive. I've never done this, but I've been told it works (IMG:style_emoticons/default/happy11.gif) |
newto914s |
Dec 3 2008, 09:00 PM
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#13
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Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
fuel pressure is now set to 29 psi. I was off on the fuel pressure by about 4 psi. Would that give me those numbers?
I tried the original 2L MPS but the car runs like absolute (IMG:style_emoticons/default/stromberg.gif) with it. I'm not sure what to do about that. |
shelby/914 |
Dec 3 2008, 10:18 PM
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#14
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Senior Member Group: Members Posts: 804 Joined: 24-August 05 From: Foxfield, Co Member No.: 4,655 Region Association: Rocky Mountains |
I took my '76 to a combination emission test and smoke shop on East Colfax that still does the older cars that don't have to be done on the dyno rather than one of the state places. The guy did look in the engine compartment but didn't notice that the air pump was gone.
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