F-127
Probationary Member
- 2
- 0
- Mar 20, 2011
-
WestCentral,
Minnesota
New DSM owner here. I recently purchased a 91 Eclipse GSX with about 142k, basically stock from my brother. I'm primarily a Ford diesel truck guy but the fuel prices have pushed me a bit to a little more fuel economy friendly, but yet fun to drive DSM as a commuter. My first work involved some Redline fluids for the Trans, T-case, and rear diff. I'm a college student and took the car to class this week.
Just the past few days the car has been having a progressively higher idle when warm, and a dropping max boost. Initially I had thought that I was having a vacuum/boost leak so I made up a boost leak tester today and gave it a whirl. The TB shaft seals are definitely out, that seemed to be the only leak I found. I capped off the emissions lines off of the TB at the same time. I can't imagine the TB shaft leak is enough to cause my high idle, since when cold it seems fine. I also started looking at other possibilities since I'd have to wait for seals to show up anyway. Of the list of possibilites, I thought coolant temperature sensor would be a likely culprit, but one additional bit of info from someone might help. Does anyone know if the computer limits max power output on a cold engine? It might explain my lower than normal boost as well. Either way, I'll probably pick up the sensor and give it a try tomorrow.
Side note: I do some of my own tuning for 7.3L diesels, I know fuel can be added only at certain engine temps if desired on that engine, so that's how I came up with that idea.
Glad to be here!
Just the past few days the car has been having a progressively higher idle when warm, and a dropping max boost. Initially I had thought that I was having a vacuum/boost leak so I made up a boost leak tester today and gave it a whirl. The TB shaft seals are definitely out, that seemed to be the only leak I found. I capped off the emissions lines off of the TB at the same time. I can't imagine the TB shaft leak is enough to cause my high idle, since when cold it seems fine. I also started looking at other possibilities since I'd have to wait for seals to show up anyway. Of the list of possibilites, I thought coolant temperature sensor would be a likely culprit, but one additional bit of info from someone might help. Does anyone know if the computer limits max power output on a cold engine? It might explain my lower than normal boost as well. Either way, I'll probably pick up the sensor and give it a try tomorrow.
Side note: I do some of my own tuning for 7.3L diesels, I know fuel can be added only at certain engine temps if desired on that engine, so that's how I came up with that idea.
Glad to be here!
