Car is a 1994 E420, can't seem to track down this issue.
When the car is at any temp below full OT it will not rev above 1500 rpm. It acts almost like when you hit the rev limiter at the redline kind of goes up to 1500 then drops to 1000, then goes back up etc. Once the car hits OT it abruptly stops having the issue and drives completely normally until it cools down again.
This car loves to get water in it's distributor caps so thats the first thing I checked. They were dry, but I cleaned them out anyways.
Other things I've tried:
Also this car had the engine wiring replaced by the factory under recall, I took a peek at them and they don't appear to be cracked in any way.
I'm not entirely sure if I'm describing what its doing right, so I made a video of it. Maybe that will help:
Video
I'm going to try pulling some codes as well, I made one of the DTC readers but I have yet to actually use it.
When the car is at any temp below full OT it will not rev above 1500 rpm. It acts almost like when you hit the rev limiter at the redline kind of goes up to 1500 then drops to 1000, then goes back up etc. Once the car hits OT it abruptly stops having the issue and drives completely normally until it cools down again.
This car loves to get water in it's distributor caps so thats the first thing I checked. They were dry, but I cleaned them out anyways.
Other things I've tried:
- Unplugged o2 sensor, ran more rich but didnt change the issue.
- Unplugged MAF, car didnt like that started stumbling but stayed on.
- Hooked my Vacuum Gauge up, read normal timing and went to 0 when revved.
- Metered the ecu coolant temp sensor, ohms checked out.
- Did a smoke test on the vacuum system and didnt see any smoke come out anywhere
Also this car had the engine wiring replaced by the factory under recall, I took a peek at them and they don't appear to be cracked in any way.
I'm not entirely sure if I'm describing what its doing right, so I made a video of it. Maybe that will help:
Video
I'm going to try pulling some codes as well, I made one of the DTC readers but I have yet to actually use it.