I have a '92 vx hatch that I just swapped a boosted z6 into and after initial start up I had cel for a code 6 which is coolant temp sensor. one day after puttin' it up and down the street I now have a code 4 (crank pos. sensor) and a code 5 (manifold absolute pressure). and still the code 6. I've gone over all of wires, the dizzy is relatively fresh, and its on a z6 boost basemap. any ideas?!?!?

 

Stock ecu?

 

no its a socketed p28 on a z6 boost basemap. another thing is that its not in limp mode which normally it would be with a code 4.

 

Map and tp plug mixed up? ect and vtec pressure sometimes get mixed? The 4 is either the distributor open or shorted wire or bad ecu. If that ecu and harness where working before..............

 

ya the ecu and dizzy were fine 2 days ago.. and I'm 90% sure I got the plugs right. I looked up the wire colors and pins on the ecu and they were correct.

 

Well after snugging up some wires to the ecu I got rid of the code 4 and 5.. I still have a code 6 for ect sensor. I tried a different sensor and checked the wire at the ecu. I'm stumped. has ANYONE else had this issue??

 

got a basemap from phearable.. open to any ideas on why this ect sensor code is still here. do i need to get the vehicle up to operating temperature after i try a new sensor? does my fan need to be hooked up?

 

I know there's somebody on this website who has the answer...

 

check thermostat ground...

 

checked that.. its fine.