weak connection with temp sensor II ; lean or rich?

Carbs & F.I.

Moderators: Amskeptic, Sluggo

Post Reply
TrollFromDownBelow
IAC Addict!
Location: Metro Detroit
Status: Offline

weak connection with temp sensor II ; lean or rich?

Post by TrollFromDownBelow » Thu Nov 03, 2016 7:00 pm

I had a temp sensor II that had worked it's way loose (threads are partially stripped). So late this summer, I reinstalled with just a dab of blue loctite (same as I did before). Me thinks I may not have had it all the way screwed in the last time I did this....seemed I was able to turn it in farther.

My question is, after I did this, it appears to be running leaner. I richened the static setting out two notches (which, interestingly, put it back to the original, presumably stock setting (I bought a rebuilt AFM about 8 years ago) and this seemed to help.

So my question is, if I didn't have a solid ground with the TS II would it make it think it was running rich, or lean?
1976 VW Bus aka tripod
FI ...8 completely solid lifters.... now it's both kinda noisy and leaky, but she sure runs good!
hambone wrote: There are those out there with no other aim but to bunch panties. It's like arguing with a pretzel.
::troll2::

User avatar
airkooledchris
IAC Addict!
Location: Eureka, California
Contact:
Status: Offline

Re: weak connection with temp sensor II ; lean or rich?

Post by airkooledchris » Thu Nov 03, 2016 9:52 pm

not based on any known facts, but I thought id heard or read that it defaults fairly rich without a TSII signal.....
1979 California Transporter

User avatar
Bleyseng
IAC Addict!
Location: Seattle again
Contact:
Status: Offline

Re: weak connection with temp sensor II ; lean or rich?

Post by Bleyseng » Fri Nov 04, 2016 7:07 am

Rich....as the engine warms up the ECU leans out the AFR. You need a richer mix when the engine is starting and cold to run.
Geoff
77 Sage Green Westy- CS 2.0L-160,000 miles
70 Ghia vert, black, stock 1600SP,- 139,000 miles,
76 914 2.1L-Nepal Orange- 160,000+ miles
http://bleysengaway.blogspot.com/

User avatar
asiab3
IAC Addict!
Location: San Diego, CA
Contact:
Status: Offline

Re: weak connection with temp sensor II ; lean or rich?

Post by asiab3 » Fri Nov 04, 2016 10:24 am

Yes to the above answers. Careful with the thread locker, if the application of it is comprehensive enough, the ground path for the sensor might be compromised, resulting in a rich condition. Testing it with an ohmmeter would give answers.

Robbie
1969 bus, "Buddy."
100k miles with me.
279k miles on Earth.

Post Reply