won't idle when cold

HotZ28

Full Member
6,409
105
63
Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
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
6,409
105
63
Buick Ownership
1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
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.
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92sub

Full Member
997
8
0
Motor City
Buick Ownership
87GN (gone), 2011 CXS (gone), 98 Regal GS
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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