Honda Prelude Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1 (Edited)
Hello,

I've got a 97 Honda Prelude, with a H22A4 motor (AUDM)

Since purchasing the car the temperature gauge will often go right up to the 'h' only after a drive. If the car is started cold and left to idle for 30 mins plus, it doesn't happen. I'm assuming the car isn't actually overheating, as the temps under the bonnet are between 70 degrees (158F) and 90 degrees (194). When idling the both fans do operate as usual.

So far I've changed/tested the following
  • Replaced ECT
  • Replaced Fan Switch (also confirmed wiring okay by shorting fans)
  • Replaced Temperature Sender (shorted wiring and ensured gauge in cluster rises)
  • Replaced Thermostat (including new seal)
  • Flushed rad, bled coolant - confirmed no coolant loss
  • Cleaned all grounds, changed location of ground on thermostat housing
  • Check CEL codes - code 3 for MAP sensor (cleaned and code is gone)
  • Changed oil and filter (for good measure) - confirmed no coolant in oil.
  • Confirmed heater core is ok - Heat coming through to cabin ok

I'm really at a loss here. Everything is working as it should, yet the gauge will slowly rise to 'h' as the car is driven.

Any advice would be greatly appreciated

28638

28639

28640
 

·
I lub Denny one tiem
Joined
·
2,406 Posts
if you cant figure it out glowshift makes a coolant temp gauge with its own sensor.
 

·
Registered
Joined
·
380 Posts
Have you used an OBD2 interface to check and see what the actual data is showing? If it reads okay there, the problem must be in the gauge.
 
1 - 3 of 3 Posts
Top