Losing boost

[ThatGuy4883]

Ok so I just bought a 2g 98 Eclipse with a 4g63t it was holding boost for a little bit maybe a week and it had a misfire. We fixed the misfire and it still isnt holding boost past 5psi if that. I have replaced plugs, wires, and soon the tps. I can not think of anything else I could use some help this is my daily driver.

 

[liquidsilver]

First step to any boost issue is a boost leak test: http://www.dsmtuners.com/forums/art...-boost-leak-test-how-boostpro-net-tester.html

 

[402tuner]

I would go through and check all your vacuum lines. There is quite a few of them that could leaking air and giving you that boost leak. There are threads on here that can teach you how to make boost leak tester as well! Good luck

 

[gofast63]

Ok so I just bought a 2g 98 Eclipse with a 4g63t it was holding boost for a little bit maybe a week and it had a misfire. We fixed the misfire and it still isnt holding boost past 5psi if that. I have replaced plugs, wires, and soon the tps. I can not think of anything else I could use some help this is my daily driver.

If Yur not holding boost then its for sure a boost leak. You can make your own tester for about five bucks.

 

[ThatGuy4883]

Thanks for the suggestions im going to try it this weekend and see if i can find the problem. Cross my fingers I just want to get this problem fixed

 

[AllShallPerish]

Sometimes boost leaks can be very hard to find. So you need to look carefully and take your time, dont pass over any areas.

Trouble spots can be, TB shaft seals, BISS, Injector seals, couplers, vacuum lines, blow off valve, ect.

 

[eli96talon]

A lose wastegate flap would also cause you not to boost very much at all.

 

[ThatGuy4883]

I want to buy a FP exhaust manifold for my 6 bolt 4g63. and I was wondering if anyone knows if it fits on a t3/t4 .50mm turbo. here is the link and if someone can help find if this fits the aftermarket turbo.


http://store.forcedperformance.net/...reen=PROD&Store_Code=FP&Product_Code=EMFPRace

 

[evileagleawd]

No that will not work on your T3/T4 turbo. The FP manifold is designed for factory turbo housings.

 

[bettfootball]

Check your wastegate actuator!

 

[ThatGuy4883]

so i would have to get a all new turbo or go to a stock