won't idle when cold

mjc8bal

Buick Newbie
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Buick Ownership
Buick
Thread starter #1
When I start my car it will surge and slowly die. When it warms up there is no problem at all. Already changed the iac
 

HotZ28

Full Member
6,249
58
48
Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
#2
It would be a good idea to mention the year, body & engine of your car. Is your car a GN, or GNX?
 

HotZ28

Full Member
6,249
58
48
Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
#4
Do you have a scanner that you can check the Engine Coolant Temp (ECT) when cold and before starting the engine? The ECT sensor may be sending the wrong info to the ECM to enrich the fuel injectors when cold. When cold, the ECT temp should be reading about ambient temp. This process works like a choke on a carb engine.
______________________________
 

92sub

Full Member
997
8
0
Location
Motor City
Buick Ownership
87GN (gone), 2011 CXS (gone), 98 Regal GS
#5
How long have you owned the car and how many miles are on it?
The 87's had a stalling problem from the factory (mine used to stall cold all the time).
I installed a performance PROM (factory Thermostat, minimum HP gain) that eliminated the stall and overall just ran a lot better.
 
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