[RESOLVED] Losing power

[BlackDSMCR]

I'm having a really strange problem with my 96 GSX, when I am driving it sometimes it feels like is loosing power, and a small bumping starts on the back of the car, when I shift to the next gear the problem stops. It happens with all the gears... does anyone knows what can be causing this problem???

 

[Boost92awd]

The small bumping sound you hear from the back can you pin point where its coming from? Have you tried a boost leak test?

 

[BlackDSMCR]

Yeah, I have made a leak test and everything seems to be working fine, and about the sound, I don't really know where it is coming...

 

[MY1GDSM]

My transfer case started go last summer And before I could swap it it started to make the Rearend lock up everonce in a While ... At First it sounded kind of like that
I would check the Fluid in the the Rear end and T-Case just to be on the Safe Side

 

[chevykevy19]

Check your carrier bearing too

 

[BlackDSMCR]

Cool!!!, thanks, I'll check that and let you know how it went..... thanks!!!!

 

[BlackDSMCR]

I am still having this problem, the problem is that if I go to 3000rpms for some reason the car starts loosing power and backfiring a lot, is like it is running on three pistons..... any idea what could it be?

I've change the spark plugs into (BPR6ES) but the problem remains...... Its driving me crazy....

 

[t25fury]

I had a very similar problem,it ended up being a torn fuel pump oring,I forgot to change it when I changed the fuel pump. Although you may not have the exact culprit you are having the exact symptons I had,wich was caused by not having enough fuel pressure(caused by a torn oring for me).

 

[BlackDSMCR]

HOw can I test that, is there a way??

 

[jawar666]

Hey Black! How you doing???

Maybe a little more info can help us to help you...

Do you get a CEL when the bumping starts??? If so, what's the code number???

I had a similar problem with my car some time ago...

 

[BlackDSMCR]

After a really long time with this issue i still don't have the solution... its driving me crazy....

The problem is that when i am driving in any gear at 3000rpms the car for some reason feels like it lose a piston...like i was driving with 3 pistons... I can drive faster or slower than 3000rpms no problem...

I've changed sparks, spark wires, and problem solved a little bit... now i have to stay around 10 segs at 3000 rpms for it to happen... I 've check the fuel proressure, fuel injectors, boost leaks and everything seems to be fine...

Does anyone has an idea what else can i check???

 

[Dsmj89]

Have you checked compression ?

 

[BlackDSMCR]

No, I haven't checked compression, I should be getting 170, right?

 

[BlackDSMCR]

Heey... good news.... after checking again and again for boost leaks...I found one yesterday... on my j-pipe.... and guess what... this problem got fixed.... awesome!!!