KA24DET tuneup

[SolTNutz]

My 240sx ( KA-24-DET ) is all the sudden running wayyyyyy too rich, starts up well when cold but once it warms up it sucks.
I was going to bring it in for a tuneup but if a sensor/maf is gone it is an expensive waste of time ( $500.00 per hr ), if he can not do the work.
This happened overnight, ran well before and then Kaput.
Any ideas of how to trouble shoot this before I send it in ( needs to be towed Drummondville to Montreal ).
Thanks in advance.

[JSEF]

500$ de l'heure?

[goshko]

Check engine ?

Have you ever cleaned the MAF before ?

Is the car still running an o2 sensor ?

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[SolTNutz]

500$ de l'heure?

Proper dyno tune, yes.

[SolTNutz]

Check engine ?

Have you ever cleaned the MAF before ?

Is the car still running an o2 sensor ?

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Check engine is good, MAF has not been cleaned, it is newish but I will check, O2 sensor yes.

Thanks

[labatt50]

fuel pressure regulator?

[goshko]

fuel pressure regulator?

il serait riche 24/7 si le FPR serait chier

[SolTNutz]

Update, it was the knock sensor, runs fine now.