Recommendation for Code Reader/Scanner - PeachParts Mercedes-Benz Forum

JimFreeh · #22 05-19-2008, 06:14 AM

Quote:

Originally Posted by TimFreeh

Correct, but the current SDS has all the functionality of the older HHT built in - two different scan tools are not required.

AFAIK none of them will. I do have an MT-2500 with the latest 2003 software but I haven't used it on a LH hot-wire system era car. My cousin has and I just called him to see if he recalls what sort of error codes the Snap-on scanner reported - he wasn't home. I'll email him a link to this thread and see if he remembers how the scanner reported codes.

Tim

I used the Snap-On 2500 to try and diagnose a run rich problem on a 93 400E.

It's been a few years, and I can still clearly recall what it did NOT observe.

Ultimate problem turned out to be a failed fuel pressure regulator. IIRC, pressure was supposed to be around 52 lbs, with a vacuum port that would allow some float to the cut off pressure. Actual measured pressure was off scale at 110 lbs. The scanner had no parameter that would clue you into this information.

The scanner looked at the O2 sensor duty cycle, fuel trim, checked ignition for each cylinder, rpm, and gave some data on the ETA, such as % open. there were several other items, cannot recall anymore.

Initially, we were suspicious of the ETA, but the scanner returned nothing that would conclusively prove or disprove if that were the cause.

Jim