1992 Q45 idle rough

[trev240]

Just bought an 1992 q45 Infiniti with 150,000. Looks it good condition but lately it idles rough, no check engine light at all but when moving at about 2000 rpm is bucks as well. what do you think might be the cause and how do diagnose this symptom?

[Jesda]

zeroforum?id=177

Take your car to T3. Post in the Q section.

[maxnix]

T-3 on South Cobb. Read the teiming chain guide article also. Now!

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[pouncer11]

there is a tech manual page on this site that tells you probable causes for rough idle. my car does the exact same thing. the woman i purchased it from had it looked at and one of my injectors is bad. its hard to tell for sure, you might try running some injector cleaner with a few tanks of gas and see how it runs after that. if it turns out to be a bad, not dirty injector, itl run you between 125(autozone) and 200(new/dealer) and that doesnt include install provided you know how to diy