RPM fluctuating and stalling

[shadowx]

I got FBO gt 19 with 50k miles, sometimes in idle when the radiator fan starts running, the RPM fluctuates and sometimes it leads to stalling. Voltage is fine and have a new battery. Also, car starts fine.

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[17MagMetal]

Any codes?

Vacuum leaks, take a gander at air filter, verify fuel is correct, pull and look at plugs is where I’d start.

If it occurs exclusively when your electric fan kicks on I may also suggest you look at your alternator.

I’ve never been great at diag’ing that (electrical) stuff, but it might be your start.

 

[shadowx]

Any codes?

Vacuum leaks, take a gander at air filter, verify fuel is correct, pull and look at plugs is where I’d start.

If it occurs exclusively when your electric fan kicks on I may also suggest you look at your alternator.

I’ve never been great at diag’ing that (electrical) stuff, but it might be your start.

No codes is my problem. I just changed spark plugs and O2 sensors and nothing changed.

 

[17MagMetal]

No codes is my problem. I just changed spark plugs and O2 sensors and nothing changed.

I’d pull the plugs and take a gander at the gaps if this occurred with the change of them.

Otherwise, fancy scan tools with live data from a professional could help you out.

You could also pull the battery for 15 minutes and see what happens lol.

 

[shadowx]

I’d pull the plugs and take a gander at the gaps if this occurred with the change of them.

Otherwise, fancy scan tools with live data from a professional could help you out.

You could also pull the battery for 15 minutes and see what happens lol.

I changed and gapped them while having the issue. Thx tho

 

[17MagMetal]

I changed and gapped them while having the issue. Thx tho

No worries, best of luck to you. Maybe your tuner could help you out as well.

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