tnbigdawg

97 EK w/JDM GSR engine w/OBD1 P72 ECU.

Problems: Fluctuating idle, temperature drop, car studders.
Recent Code 43 - Fuel Supply, but no longer lighting up.

We are still using the stock CX radiator and stock CX wiring harness that we rewired. We can't figure this out. The temperature drops while driving and sometimes fluctuates from warm to cold.

Can anybody HELP!!!!!!!

2oh6ek-r

no check engine light.......

Andy M

If the temperature drops suddenly, your thermostat is probably shot. When they go bad, they usually are stuck open, which means that at idle, the motor will warm up, and when you rev it, it pumps more water and cools down.

Thermostats are cheap.

tnbigdawg

Thanks a lot, I think that's the problem.

2oh6ek-r

what would cause it to studder in the mid range tho?? it doent do it all the time it does happen time to time...

VTECVillain

Possible solutions

Vacuum Leak

Thermostat

Timing