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Old 10-04-2003, 01:06 PM
Registered User
Join Date: Aug 2002
Posts: 179
data retrieval

Okay, here's the scoop. I've got an 88 Volvo 740 that refuses to pass the local environmental gas tests. From the start it originally read lean, then switched to rich once I replaced the o2 and thermosat (cooler). Very frustrating!

But that's not the question, that's the problem. The question has to do with constantly being charged to test the results. Getting expensive as its been in for 5 tests without success. So, I'm looking for a cheap testing kit for NOx and CO. Ideally something that can be attached to a VOM or laptop. There must be somebody that manufactures these things at a reasonable price suitable for a shadetree mechanic. I'm dreading the results of testing the 95E320 (is coming up next year). I would love to be ahead of the crowd.

So..does anybody out there know of some solutions?
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Old 10-04-2003, 02:48 PM
bjcsc's Avatar
Registered User
Join Date: Nov 2002
Location: Charleston, SC
Posts: 672
They're out there...

Exhaust Gas Tester
1982 Mercedes-Benz 300CD
1982 Mercedes-Benz 240D - stick
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Old 10-04-2003, 02:50 PM
TX76513's Avatar
Platinum Member
Join Date: Apr 2003
Location: Brandon, Mississippi
Posts: 4,940
Testing Equip

Here is a link to a site that may have what you want
15 VW Passat TDI
97 S500
86 Holden Jackaroo Turbo D
86 300SDL
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Old 10-04-2003, 03:54 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
Have you tried the turbobrick forum?

Sounds to me like you have to become more familiar with the fuel system in your car. An exhaust gas analyzer won't tell you more than emissions test results tell you. It certainly won't spell out in black and white what component isn't functioning. Don't let the cost of equipment and parts you're throwing at your car exceed what a professional would charge to fix it.

I don't mean to come across as condescending but all sorts of folks have sorted out emissions problems without an exhaust gas analyzer.

95 S420
91 300SE
87 300SDL
83 300SD
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Old 10-04-2003, 05:37 PM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
All feedback control systems are best adjusted electronically. There is a value like duty cycle that can be monitored like a MB to calibrate that year Volvo.

The e320 automatically adapts so there is no adjustment. As was mentioned, it really doesn't do much good to know the exhaust is wrong, unless prepared to diagnose it.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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