SickNasty99GST
10+ Year Contributor
- 33
- 0
- Sep 24, 2009
-
Pearl Harbor,
Hawaii
So, I made a post a while back about the problems I was having with my '99 GST. A few good ideas were suggested, but nothing has panned out.
I tuned my GST the first week of January, before I left on deployment. It was tuned at 14psi, and put down 285whp on a Dynopac setup in Honolulu, tuned by Shawn at Munky Wurks. I'm running stock sidemount, crushed 1G BOV, Evo III 16G, and RC 750's. About a month later, my wife emailed me and said the Eclipse died on her on the freeway. No apparent problems or anything sudden, it just died while driving. She got it to fire back up eventually, and limped it home, staying out of boost. I know she wasn't beating on it, my wife babies the Eclipse.
The car builds about 5psi, then bucks uncontrollably, and won't rev any higher. Typically, RPM's make it to about 3200 or so, and then get restricted. Also, cold starting, especially in the morning before work, took about 4-5 key turns to get it to fire up. My AEM UEGO read anywhere between 14.0-17.0 A/F once warmed up. The car is no longer driven.
Fast forward to May:
I was back on Oahu for 2 weeks due to a death in the family, and in my spare time, I started troubleshooting. I got under the car, and the first thing I noticed was that my pullies were loose as all hell. I pulled off and replaced my crank pulley, A/C pulley, and power steering pulley, along with all the belts. Obviously, that didn't fix anything related to the boost problems.
I then decided to replace all the injectors. The car runs a little smoother, but still gets "stuck" around 5psi. I did a boost leak test...no boost leaks. I was baffled, and very frustrated.
I had to fly back to the Middle East after my 2 weeks home was up, with the Eclipse still not running. I've finally come to the conclusion that it may be my fuel pump?
What do you guys think?? The car has 86,500 miles on it. Stock fuel pump... I started thinking about it, and I do remember hearing a high-pitched whine coming from the rear hatch area. I bought a Walbro 255lph pump, but it's waiting until I get home to install it. I also plan on picking up an Aeromotive AFPR...and I'm hoping and praying these parts fix my issue. Does it sound like I'm on the right track?
Any feedback is greatly appreciated!
I tuned my GST the first week of January, before I left on deployment. It was tuned at 14psi, and put down 285whp on a Dynopac setup in Honolulu, tuned by Shawn at Munky Wurks. I'm running stock sidemount, crushed 1G BOV, Evo III 16G, and RC 750's. About a month later, my wife emailed me and said the Eclipse died on her on the freeway. No apparent problems or anything sudden, it just died while driving. She got it to fire back up eventually, and limped it home, staying out of boost. I know she wasn't beating on it, my wife babies the Eclipse.
The car builds about 5psi, then bucks uncontrollably, and won't rev any higher. Typically, RPM's make it to about 3200 or so, and then get restricted. Also, cold starting, especially in the morning before work, took about 4-5 key turns to get it to fire up. My AEM UEGO read anywhere between 14.0-17.0 A/F once warmed up. The car is no longer driven.
Fast forward to May:
I was back on Oahu for 2 weeks due to a death in the family, and in my spare time, I started troubleshooting. I got under the car, and the first thing I noticed was that my pullies were loose as all hell. I pulled off and replaced my crank pulley, A/C pulley, and power steering pulley, along with all the belts. Obviously, that didn't fix anything related to the boost problems.
I then decided to replace all the injectors. The car runs a little smoother, but still gets "stuck" around 5psi. I did a boost leak test...no boost leaks. I was baffled, and very frustrated.
I had to fly back to the Middle East after my 2 weeks home was up, with the Eclipse still not running. I've finally come to the conclusion that it may be my fuel pump?
What do you guys think?? The car has 86,500 miles on it. Stock fuel pump... I started thinking about it, and I do remember hearing a high-pitched whine coming from the rear hatch area. I bought a Walbro 255lph pump, but it's waiting until I get home to install it. I also plan on picking up an Aeromotive AFPR...and I'm hoping and praying these parts fix my issue. Does it sound like I'm on the right track? Any feedback is greatly appreciated!
. I dont think I'm hitting the limits of the pump. I'm pretty sure its just done. When the car was tuned (on an Apexi NEO with AEM UEGO wideband) it ran great. It ran very well for a little more than a month, than randomly just went kaput. I didn't mess with the MAS air sensor at all...
