The truck listed above acts like it is running on two cylinders when cold. Runs fine when it's good and hot.
Dec 18, 2023 at 3:35 PM
Runs rough when cold?
1991 NISSAN HARDBODY
HOWARD JOHNSTON
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Hi,
When was the last tune-up? When it gets colder outside, the fuel mixture is much richer when it's first started. If you have old spark plugs, that can cause it.
Also, take a look through this link. It explains how to retrieve diagnostic trouble codes on this model-year vehicle without a scan tool. Try doing this to see if there are any diagnostic codes that may point us in the right direction.
https://www.2carpros.com/articles/nissan-obd1-diagnostic-trouble-codes-and-retrieval-procedure-1984-to-1994
Let me know.
Joe
When was the last tune-up? When it gets colder outside, the fuel mixture is much richer when it's first started. If you have old spark plugs, that can cause it.
Also, take a look through this link. It explains how to retrieve diagnostic trouble codes on this model-year vehicle without a scan tool. Try doing this to see if there are any diagnostic codes that may point us in the right direction.
https://www.2carpros.com/articles/nissan-obd1-diagnostic-trouble-codes-and-retrieval-procedure-1984-to-1994
Let me know.
Joe
Dec 18, 2023 at 8:17 PM