Ok so I have a 94 integra b18c1 boosted 750cc injectors walbro 450 on a ebay 57 trim tuned on chrome by p/o. When I cold start the car in the morning afrs are 14.7~15.0 cruising 11.5~12.0 wot in boost. But as soon as it warms to operating temp afrs cruising are anywhere from 15.0-18.5. Wot boost jumps to 12.5-13.5. Car does have a civic half rad with fresh coolant. Im stumped and have researched can't find a answer anywhere. Please help

 

Forgot to mention I'm on e85 also

 

The cooling system has nothing to do with AFRs.

Sounds like you need to get the car tuned.

 

car has been tuned, and this just recently started happening, i should say i swapped the turbo motor in from a coupe. and in it it never has this problem this bad. when i got it it would move around a bit but never go above 15.5 or so.

 

YOU NEED TO GET THE CAR TUNED!

Change the hardware, change the tune. You have zero clue what kind of tune is on there since it was done by the PO. You can't change the turbo and use the same map. It doesnt work like that.

Get the car tuned.

 

I didn't swap turbos. Motor came out of a coupe just like it is and went into integra. Nothing changed at all

 

Okay, good luck with it.

 

Make sure there are no exhaust leaks before the wideband sensor. It may be a false lean condition due to exhaust leak that shows itself after the engine warms up.

 

Get it tuned.

Crome sux

 

What injectors are you running? I notice your are on E85. If you are running older injectors that are not E85 compatible, you could run into an issue where heat and E85 closes up the injectors causing a lean condition.

 

Thassa smart one.

 

See links below.

ATTENTION: FIC 1680 & ID 1600cc injector owners - EvoXForums.com - Mitsubishi Lancer Evolution X Forums
https://honda-tech.com/forums/engine...ecall-3006186/
Problem with Id 1600 ! - Engine - GT-R Life