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Cold idle RPM question


Moto51

Member
Joined
Mar 30, 2019
Messages
6
City
CT
Vehicle Year
1988
Transmission
Automatic
88 2.9 FI auto. What should the cold start rpm be and for how long. When I start it. The RPM is 1800 for about 5sec. Then drops to 1600 and maybe starts creeping lower a bit. Doesn't get to 8-900 untill it's at normal temp.
Just seems like a long time to me. The only sensor I changed is the coolant sensor, 2wire. No change, just $40
wasted.
 

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