If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
In article
ich.edu>, "Daniel J. Stern" > wrote: > HC: 504ppm (limit 300ppm) FAIL > CO: 6.76% (limit 1.5%) FAIL > NO: N/A > > Still looks like lean misfire under load, possibly inoperative or clogged > EGR system, possibly dead catalytic converter(s), possibly inoperative > Oxygen sensor, possibly malfunctioning carburetor, possibly malfunctioning > Lean Burn computer... Lean misfire with 6.7% CO and attendant 504 ppm HC? I don't think so... > ...answer's still the same: Proper and skillful diagnosis. Yup, the rest of the gas readings would be a big help also. |
Ads |
#12
|
|||
|
|||
Daniel J. Stern wrote: > Those are ASM2525 (acceleration simulation). OK, the limits seemed pretty tight for an idle test - that explains things! > HC: 504ppm (limit 300ppm) FAIL > CO: 6.76% (limit 1.5%) FAIL > Those are pretty standard state limits for an '87 car, and he's flunking > them very, very badly. No doubt. I'd go after rich-running culprits first; gross causes like air bleed blockage in the carb, choke closed, etc... > If he's running lean enough to cause those readings, there won't be much > CO off the manifold in the first place, so the catcon won't have a big job > getting rid of it. The converter may be toast already having to deal with this kind of overload (at idle). > He might be on the phone awhile. There weren't all that many techs who > could do a good job with these Lean Burn systems when they were current > and new! That's a challenge I like, but the work would be "by the hour" for sure. Toyota MDT in MO |
#13
|
|||
|
|||
On Sat, 28 May 2005, aarcuda69062 wrote:
> > HC: 504ppm (limit 300ppm) FAIL > > CO: 6.76% (limit 1.5%) FAIL > > NO: N/A > > > > Still looks like lean misfire under load, possibly inoperative or clogged > > EGR system, possibly dead catalytic converter(s), possibly inoperative > > Oxygen sensor, possibly malfunctioning carburetor, possibly malfunctioning > > Lean Burn computer... > > Lean misfire with 6.7% CO and attendant 504 ppm HC? Lean misfire *under load*. The 6.7% CO and 504ppm HC are idle readings. |
#14
|
|||
|
|||
On Sat, 28 May 2005, Comboverfish wrote:
> > Those are pretty standard state limits for an '87 car, and he's > > flunking them very, very badly. > > No doubt. I'd go after rich-running culprits first; gross causes like > air bleed blockage in the carb, choke closed, etc... Air bleed, perhaps, but a stuck-closed choke doesn't jive with 0.16% CO and 1220ppm NOx under load. > The converter may be toast already having to deal with this kind of > overload (at idle). Very possibly so. I can't remember if they were still farting around with multiple converters in '87. > > He might be on the phone awhile. There weren't all that many techs who > > could do a good job with these Lean Burn systems when they were > > current and new! > > That's a challenge I like, but the work would be "by the hour" for sure. Well, that's part of the challenge: matching a tech able *and* willing to put in the time with an owner able *and* willing to pay him to do so! |
#15
|
|||
|
|||
In article
ich.edu>, "Daniel J. Stern" > wrote: > On Sat, 28 May 2005, aarcuda69062 wrote: > > > > HC: 504ppm (limit 300ppm) FAIL > > > CO: 6.76% (limit 1.5%) FAIL > > > NO: N/A > > > > > > Still looks like lean misfire under load, possibly inoperative or clogged > > > EGR system, possibly dead catalytic converter(s), possibly inoperative > > > Oxygen sensor, possibly malfunctioning carburetor, possibly malfunctioning > > > Lean Burn computer... > > > > Lean misfire with 6.7% CO and attendant 504 ppm HC? > > Lean misfire *under load*. The 6.7% CO and 504ppm HC are idle readings. True enough... your text reply followed the idle reading though. |
#16
|
|||
|
|||
Daniel J. Stern wrote: > Air bleed, perhaps, but a stuck-closed choke doesn't jive with 0.16% CO > and 1220ppm NOx under load. That's the problem here... there are surely multiple problems which will all need to be corrected before all three gasses are within the allowable limits. We're theory ****ing without hands-on testing. Great, now I just typed '****ing' and 'hands-on' in the same sentence. Toyota MDT in MO |
#17
|
|||
|
|||
I'm From Canada (ONT.) And I forgot to mention a stubborn oil leak from your
guess is as good as mine(I just can't pin point it.) I know it's not the EGR or Cat Con (Replaced in '01 car drove it to Nov 2002 then it sat for 2003 & 2004). I don't know if the oxygen sensor was replaced but more than likely it was. Thanks Mr. Minnow |
#18
|
|||
|
|||
On Sat, 28 May 2005, Mr. Minnow wrote:
> I'm From Canada (ONT.) And I forgot to mention a stubborn oil leak from > your guess is as good as mine(I just can't pin point it.) I know it's > not the EGR or Cat Con (Replaced in '01 car drove it to Nov 2002 then it > sat for 2003 & 2004). I don't know if the oxygen sensor was replaced but > more than likely it was. You really can't say the EGR and catcon are good just because they were replaced. With your HC as high as it is, the catcon could easily be cooked. And the EGR valve is only one part of the system; the crossover passage and ports (in the intake manifold and the heads, respectively) could well be clogged with carbon. Don't know where in Ontario you are, but I can recommend a couple of good shops in the Toronto area. Canadian Tire does not count as a good shop. |
#19
|
|||
|
|||
On Sat, 28 May 2005 20:15:16 -0400, "Mr. Minnow"
> wrote: >I'm From Canada (ONT.) And I forgot to mention a stubborn oil leak from your >guess is as good as mine(I just can't pin point it.) I know it's not the EGR >or Cat Con (Replaced in '01 car drove it to Nov 2002 then it sat for 2003 & >2004). I don't know if the oxygen sensor was replaced but more than likely >it was. > >Thanks Mr. Minnow > Where in Ontario? I'm in Waterloo. |
#20
|
|||
|
|||
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
2005 Accord LX, fluttering sound while idle (and various other problems) | elmo | Honda | 1 | April 23rd 05 05:01 PM |
Minivans models and known problems | Frank | Technology | 6 | April 2nd 05 05:30 AM |
VW Problems website | [email protected] | VW air cooled | 5 | March 13th 05 09:31 PM |
various problems with my MX | nytrex | Mazda | 6 | February 7th 05 07:08 PM |
These problems normal for a 5-year-old Saturn? | Philip Nasadowski | Saturn | 7 | August 30th 04 03:55 AM |