rotaryallday

Hey i Have a 90 gtu with a tii swap. I have a bad hot start problem or flooding. It starts no problem when cold. But once the engine is warmed up it floods everytime but if i wait til it cools down again it will start..? any suggestions?

under_water_diver

Are you turning the car off before it gets up to normal operating temp?

satch

iTrader: (1)

One thing you need to do is check the Water thermosensor reading at the ECU. This sensor detects the coolant temp at start up and then decides how much fuel is used depending on the reading of the temp. On a cold start if the sensor reads correctly the ECU elects to inject more fuel than normal because a cold engine is harder to start then a warm one. Normally a warm engine would require less fuel but if the sensor is reading the coolant temp incorrectly then too much fuel "might" be injected upon a warm start.

Pin 2E, Green/White wire, is the Thermosensor at the ECU. Generally the reading will be about 2 to 3 volts on a cold start (low coolant temp) and about .5 volts on a warm start (hot coolant temp). See what yours reads.

D. Gomes

Maybe this link will help...http://rx7.com/techarticles_floodprev.html

Sgtblue

iTrader: (16)

https://www.rx7club.com/showthread.p...ow+compression
Post #3 in particular.

rotaryallday

Hey satch im gonna try the volt test and see what i come up with. To clear things up im gonna pull the ecu plug out and find that pin and turn ignition on and see what it reads when hot and when its cold? im not to sure how to do this test so i wanna clear things up thanks.