240sx acura tech

I have a customers car in the shop. its been to three other shops in the pass month. Brought its here as a last effort. Unfortunately in the 9 years of being a master tech ive only work on a couple of these and never have seen this issue.

car starts and runs fine. Bring it to op temp. no problems. turn it off. let sit 5 mins. start it up. it will run fine for about a minute then start to idle low and lope and will eventually die...

ive done the usually stuff. replaced rear o2, egr port clean, plugs, cleaned the iac and throttle, coolant temp switch, swap coils, checked cold valve, checked for intake leaks and checked fuel pressure.

no check engine light. any help would be a greatly appreciated

240sx acura tech

I think I figured out the problem. found the front o2 sensor reading high after warming up. replaced front o2 and has not done it since.

main70072

That should do it. Front o2 sensors can can be a headache on these cars.

240sx acura tech

yeah it never thru a light. rear o2 was stuck lean. both were ntk brand.