Oldsmobile/Buick Repair: Cutlass Running Rough, vacuum hoses, coolant temp

Question
Good Morning!

Thanks for the reply..that is something I did not ask him...will check on that.

Thank you!!

Larry Mishoe
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Followup To
Question -
Good Afternoon!

I'm trying to help my dad with his 1986 Cutlass supreme.  When he starts it in the morning, or anytime after a good cool down, it will run rough for several minutes.  Usuall;y by the time he gets out of his subdivision it has smoothed out.

He has the 5 litre engine.  He has replaced the choke, and the secondary choke pull down.  Verified the vacuum hoses are OK; done a tuneup.  He doesn't know where to turn next...Any thoughts?

Thanks!
Larry Mishoe
Answer -
Are you positive that the choke closes all the way ?>

As soon as he starts it, the choke should pull open about approx 1/4 inch.

Does it ?.




autohelp

Answer
Also have your mechanic OHM out the coolant sensor located just in front of the carb and has a BLACK and YELLOW wire attached to it.

It should ohm out at:

Coolant temp @ 210 degrees    approx 185 Ohms.
   "     "  " 160   "          "   450   "
   "     "  " 100   "          "   1600  "
   "     "  " 70    "          "   3400  "
   "     "  " 40    "          "   7500  "
   "     "  " 20    "          "   13500 "
   "     "  " 0     "          "   25000 "
   "     "  " -40   "          "   100700 "  




autohelp