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 Post subject: Runs doggy when warm outside
PostPosted: Tue May 19, 2009 8:55 pm 
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Newly Aquired
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Joined: Sun Apr 05, 2009 3:08 pm
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Location: Wisconsin
When the temps outside get to about 80 degree F the car starts to runs doggy. It runs great when it is cooler outside. What should I look to adjust?


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PostPosted: Wed May 20, 2009 8:33 am 
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EMI
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Location: Manassas, VA
Probably MAT enrichment/timing. You're seeing higher inlet temps so it's probably making the computer do something to the fuel and/or timing that's causing the poor running.

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Jon
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Electromotive, Inc
jon at emi.cc
www.distributorless.com


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 Post subject:
PostPosted: Wed May 20, 2009 11:51 am 
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Yes it appears to have been the MAT. It was set to retard the advance 2 degrees when the temp go over 25 celsius. I set it to zero for now and wil see this afternoon if that makes a difference as it is supposed to get to 27 celsius (over 80 deg F). It is amazing that smal amount made a difference. I also took the liberty this morning to bump the advance up by 2 degrees in certain areas (Mostly crusing) as based on yesterday I must be right on the border line of enough advance. I was careful not to get to extreme as to cause knocking or pinging. Thanks for your help.


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 Post subject:
PostPosted: Wed May 20, 2009 10:11 pm 
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Location: Wisconsin
I set the DR0 for MAT Density Advance/Retard to zero and the problem went away. I took the opportunity to increase y advance at my crusing low load conditions to improve my response and better economy at crusing speeds. The outside temps got 88 degrees. According to the TEC 2 the MAT was 33 celsius (93 deg F). The car behaved much better with these simple changes. I think I might be able to squeak out a few more degrees of advance in my lower areas. Thanks for your confirmations Jon, it helpd me to narrow down the cause.


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