engine lost power
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Junior Member
Joined: Jan 2016
Posts: 16
From: California
The engine performs normally when under load when coolant temps are low?
The computer shifts the engine between operational modes at a certain coolant temp.
Did you try operating on the road engine warm with the O2 sensor disconnected and then coolant sensor. O2 sensor is locked out coolant cold.
When cold the computer may not use input from all sensors. If the engine performs normally when under load and coolant cold and has problems coolant hot. It could be a bad sensor.
An engine under load also exposes marginal parts. If compression, etc is OK, these tend to be ign or fuel related. Unless bad fuel a plugged fuel filter is rare on this year/model.
If EGR works, try disconnecting the vacuum hose going the modular, plugging the hose and driving when engine hot.
Suggest trying the above then go through ign system with new parts. This is a hit or miss approach but without a diagnostic machine or code output it tends to come down to an educated guess.
The computer shifts the engine between operational modes at a certain coolant temp.
Did you try operating on the road engine warm with the O2 sensor disconnected and then coolant sensor. O2 sensor is locked out coolant cold.
When cold the computer may not use input from all sensors. If the engine performs normally when under load and coolant cold and has problems coolant hot. It could be a bad sensor.
An engine under load also exposes marginal parts. If compression, etc is OK, these tend to be ign or fuel related. Unless bad fuel a plugged fuel filter is rare on this year/model.
If EGR works, try disconnecting the vacuum hose going the modular, plugging the hose and driving when engine hot.
Suggest trying the above then go through ign system with new parts. This is a hit or miss approach but without a diagnostic machine or code output it tends to come down to an educated guess.
I'm going to replace the temp sensor, it's 5 yrs old and I notice while testing it that I could spin the plug but it doesn't leak. I agree and going to pull and replace sensors.
Thank you for your advise.
Thread Starter
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Junior Member
Joined: Jan 2016
Posts: 16
From: California
Thanks!
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