Just bought a 99 GSX, some problems

[ryanx99GS]

Okay well I just picked up a 99 GSX with 69,000 miles. 1 owner. Has been sitting since it was last serviced at 60,000 miles (timing belt, etc). When I bought it I noticed it was only getting 15-16 MPG, quickly to notice the CEL came on and I needed a new MAF. Replaced that today as well as changing the oil to Mobil 1 Synthetic, putting brand new Denso Platinum plugs in (old plugs pulled had no sign of coolant being mixed in) and checking all the hoses, bolts etc. All 4 cylinders read 150 for the compression test. Quicky noticed that my gas mileage is back to normal, but the smoking while stopped at a stop light/sign etc is still there. Turbo has no shaft play what so ever. Is this due to a failing/leaking head gasket? Thanks

 

[snowborder714]

I'm not sure about the smoking, but I'd recommend getting rid of the platinum plugs and getting some NGK BPR6ES copper plugs. They are what works best in our turbo DSM's. Then once you start turning the boost up, you can get 1 range colder plugs, which are BPR7ES.

Here's some info on the platinum plugs:
http://www.dsmtuners.com/forums/newbie-forum/9213-platinum-plugs-merged-6-7-a.html

 

[ryanx99GS]

Okay thanks, I will head to napa tomorrow and pick those up.

 

[turbobird14]

the NGK BPR6ES plugs are the best for every situation. i was using them even at 21 lbs of boost and they were holding up great!!! if you get those i wouldnt even worry about changing them colder unless its about time for new plugs

 

[brandonzero0]

The compression in a2g engine shold be around 170-190.

 

[vinnio]

The compression in a2g engine should be around 170-190.

Yea, your right... if the engine is brand new. But with 70k on it is going to have lower compression.

As long as they are within 10% of each other and are all above 135 (I believe) your fine.

What color is the smoke? Also remember its winter time, so the cold will cause a lot more condensation to appear as smoke. This is perfectly normal. Does the "smoke" go away or become less apparent after more than a half hour of driving?

As far as the plugs go... NGK or denso will work. Obviously ngk is preferred, but I’ve never had a problem with denso!

Good luck! Sounds like you got a nice car.

 

[brandonzero0]

Yea, your right... if the engine is brand new. But with 70k on it is going to have lower compression.

As long as they are within 10% of each other and are all above 135 (I believe) your fine.

What color is the smoke? Also remember its winter time, so the cold will cause a lot more condensation to appear as smoke. This is perfectly normal. Does the "smoke" go away or become less apparent after more than a half hour of driving?

As far as the plugs go... NGK or denso will work. Obviously ngk is preferred, but I’ve never had a problem with denso!

Good luck! Sounds like you got a nice car.

MEH I had a 95 fwd until last march with 131 on orignal motor 2nd owner and had 173,180,180,170. then again it wasn't driven the way it was supposed to.